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< symbol id = "ui-radios" viewBox = "0 0 16 16" >
< path d = "M7 2.5a.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 .5.5v1a.5.5 0 0 1-.5.5h-7a.5.5 0 0 1-.5-.5v-1zM0 12a3 3 0 1 1 6 0 3 3 0 0 1-6 0zm7-1.5a.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 .5.5v1a.5.5 0 0 1-.5.5h-7a.5.5 0 0 1-.5-.5v-1zm0-5a.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 0 1h-5a.5.5 0 0 1-.5-.5zm0 8a.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 0 1h-5a.5.5 0 0 1-.5-.5zM3 1a3 3 0 1 0 0 6 3 3 0 0 0 0-6zm0 4.5a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3z" / >
< / symbol >
< / svg >
< header class = "navbar navbar-expand-lg bd-navbar sticky-top" >
< nav class = "container-xxl bd-gutter flex-wrap flex-lg-nowrap" aria-label = "Main navigation" >
< div class = "bd-navbar-toggle" >
< button class = "navbar-toggler p-2" type = "button" data-bs-toggle = "offcanvas" data-bs-target = "#bdSidebar" aria-controls = "bdSidebar" aria-label = "Toggle docs navigation" >
< svg xmlns = "http://www.w3.org/2000/svg" width = "24" height = "24" class = "bi" fill = "currentColor" viewBox = "0 0 16 16" >
< path fill-rule = "evenodd" d = "M2.5 11.5A.5.5 0 0 1 3 11h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4A.5.5 0 0 1 3 7h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4A.5.5 0 0 1 3 3h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5z" / >
< / svg >
< span class = "d-none fs-6 pe-1" > Browse< / span >
< / button >
< / div >
< a class = "navbar-brand p-0 me-0 me-lg-2" href = "/" aria-label = "Bootstrap" >
< svg xmlns = "http://www.w3.org/2000/svg" width = "40" height = "32" class = "d-block my-1" viewBox = "0 0 118 94" role = "img" > < title > Bootstrap< / title > < path fill-rule = "evenodd" clip-rule = "evenodd" d = "M24.509 0c-6.733 0-11.715 5.893-11.492 12.284.214 6.14-.064 14.092-2.066 20.577C8.943 39.365 5.547 43.485 0 44.014v5.972c5.547.529 8.943 4.649 10.951 11.153 2.002 6.485 2.28 14.437 2.066 20.577C12.794 88.106 17.776 94 24.51 94H93.5c6.733 0 11.714-5.893 11.491-12.284-.214-6.14.064-14.092 2.066-20.577 2.009-6.504 5.396-10.624 10.943-11.153v-5.972c-5.547-.529-8.934-4.649-10.943-11.153-2.002-6.484-2.28-14.437-2.066-20.577C105.214 5.894 100.233 0 93.5 0H24.508zM80 57.863C80 66.663 73.436 72 62.543 72H44a2 2 0 01-2-2V24a2 2 0 012-2h18.437c9.083 0 15.044 4.92 15.044 12.474 0 5.302-4.01 10.049-9.119 10.88v.277C75.317 46.394 80 51.21 80 57.863zM60.521 28.34H49.948v14.934h8.905c6.884 0 10.68-2.772 10.68-7.727 0-4.643-3.264-7.207-9.012-7.207zM49.948 49.2v16.458H60.91c7.167 0 10.964-2.876 10.964-8.281 0-5.406-3.903-8.178-11.425-8.178H49.948z" fill = "currentColor" / > < / svg >
< / a >
< div class = "d-flex" >
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< div class = "bd-search" id = "docsearch" data-bd-docs-version = "5.3" > < / div >
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< button class = "navbar-toggler d-flex d-lg-none order-3 p-2" type = "button" data-bs-toggle = "offcanvas" data-bs-target = "#bdNavbar" aria-controls = "bdNavbar" aria-label = "Toggle navigation" >
< svg class = "bi" aria-hidden = "true" > < use xlink:href = "#three-dots" > < / use > < / svg >
< / button >
< / div >
< div class = "offcanvas-lg offcanvas-end flex-grow-1" tabindex = "-1" id = "bdNavbar" aria-labelledby = "bdNavbarOffcanvasLabel" data-bs-scroll = "true" >
< div class = "offcanvas-header px-4 pb-0" >
< h5 class = "offcanvas-title text-white" id = "bdNavbarOffcanvasLabel" > Bootstrap< / h5 >
< button type = "button" class = "btn-close btn-close-white" data-bs-dismiss = "offcanvas" aria-label = "Close" data-bs-target = "#bdNavbar" > < / button >
< / div >
< div class = "offcanvas-body p-4 pt-0 p-lg-0" >
< hr class = "d-lg-none text-white-50" >
< ul class = "navbar-nav flex-row flex-wrap bd-navbar-nav" >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2 active" aria-current = "true" href = "/docs/5.3/getting-started/introduction/" onclick = "ga('send', 'event', 'Navbar', 'Community links', 'Docs');" > Docs< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "/docs/5.3/examples/" onclick = "ga('send', 'event', 'Navbar', 'Community links', 'Examples');" > Examples< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://icons.getbootstrap.com/" onclick = "ga('send', 'event', 'Navbar', 'Community links', 'Icons');" target = "_blank" rel = "noopener" > Icons< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://themes.getbootstrap.com/" onclick = "ga('send', 'event', 'Navbar', 'Community links', 'Themes');" target = "_blank" rel = "noopener" > Themes< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://blog.getbootstrap.com/" onclick = "ga('send', 'event', 'Navbar', 'Community links', 'Blog');" target = "_blank" rel = "noopener" > Blog< / a >
< / li >
< / ul >
< hr class = "d-lg-none text-white-50" >
< ul class = "navbar-nav flex-row flex-wrap ms-md-auto" >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://github.com/twbs" target = "_blank" rel = "noopener" >
< svg xmlns = "http://www.w3.org/2000/svg" width = "16" height = "16" class = "navbar-nav-svg" viewBox = "0 0 512 499.36" role = "img" > < title > GitHub< / title > < path fill = "currentColor" fill-rule = "evenodd" d = "M256 0C114.64 0 0 114.61 0 256c0 113.09 73.34 209 175.08 242.9 12.8 2.35 17.47-5.56 17.47-12.34 0-6.08-.22-22.18-.35-43.54-71.2 15.49-86.2-34.34-86.2-34.34-11.64-29.57-28.42-37.45-28.42-37.45-23.27-15.84 1.73-15.55 1.73-15.55 25.69 1.81 39.21 26.38 39.21 26.38 22.84 39.12 59.92 27.82 74.5 21.27 2.33-16.54 8.94-27.82 16.25-34.22-56.84-6.43-116.6-28.43-116.6-126.49 0-27.95 10-50.8 26.35-68.69-2.63-6.48-11.42-32.5 2.51-67.75 0 0 21.49-6.88 70.4 26.24a242.65 242.65 0 0 1 128.18 0c48.87-33.13 70.33-26.24 70.33-26.24 14 35.25 5.18 61.27 2.55 67.75 16.41 17.9 26.31 40.75 26.31 68.69 0 98.35-59.85 120-116.88 126.32 9.19 7.9 17.38 23.53 17.38 47.41 0 34.22-.31 61.83-.31 70.23 0 6.85 4.61 14.81 17.6 12.31C438.72 464.97 512 369.08 512 256.02 512 114.62 397.37 0 256 0z" / > < / svg >
< small class = "d-lg-none ms-2" > GitHub< / small >
< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://twitter.com/getbootstrap" target = "_blank" rel = "noopener" >
< svg xmlns = "http://www.w3.org/2000/svg" width = "16" height = "16" class = "navbar-nav-svg" viewBox = "0 0 512 416.32" role = "img" > < title > Twitter< / title > < path fill = "currentColor" d = "M160.83 416.32c193.2 0 298.92-160.22 298.92-298.92 0-4.51 0-9-.2-13.52A214 214 0 0 0 512 49.38a212.93 212.93 0 0 1-60.44 16.6 105.7 105.7 0 0 0 46.3-58.19 209 209 0 0 1-66.79 25.37 105.09 105.09 0 0 0-181.73 71.91 116.12 116.12 0 0 0 2.66 24c-87.28-4.3-164.73-46.3-216.56-109.82A105.48 105.48 0 0 0 68 159.6a106.27 106.27 0 0 1-47.53-13.11v1.43a105.28 105.28 0 0 0 84.21 103.06 105.67 105.67 0 0 1-47.33 1.84 105.06 105.06 0 0 0 98.14 72.94A210.72 210.72 0 0 1 25 370.84a202.17 202.17 0 0 1-25-1.43 298.85 298.85 0 0 0 160.83 46.92" / > < / svg >
< small class = "d-lg-none ms-2" > Twitter< / small >
< / a >
< / li >
< li class = "nav-item col-6 col-lg-auto" >
< a class = "nav-link py-2 px-0 px-lg-2" href = "https://opencollective.com/bootstrap" target = "_blank" rel = "noopener" >
< svg xmlns = "http://www.w3.org/2000/svg" width = "16" height = "16" fill = "currentColor" fill-rule = "evenodd" class = "navbar-nav-svg" viewBox = "0 0 40 41" role = "img" > < title > Open Collective< / title > < path fill-opacity = ".4" d = "M32.8 21c0 2.4-.8 4.9-2 6.9l5.1 5.1c2.5-3.4 4.1-7.6 4.1-12 0-4.6-1.6-8.8-4-12.2L30.7 14c1.2 2 2 4.3 2 7z" / > < path d = "M20 33.7a12.8 12.8 0 0 1 0-25.6c2.6 0 5 .7 7 2.1L32 5a20 20 0 1 0 .1 31.9l-5-5.2a13 13 0 0 1-7 2z" / > < / svg >
< small class = "d-lg-none ms-2" > Open Collective< / small >
< / a >
< / li >
< li class = "nav-item py-2 py-lg-1 col-12 col-lg-auto" >
< div class = "vr d-none d-lg-flex h-100 mx-lg-2 text-white" > < / div >
< hr class = "d-lg-none my-2 text-white-50" >
< / li >
< li class = "nav-item dropdown" >
< button type = "button" class = "btn btn-link nav-link py-2 px-0 px-lg-2 dropdown-toggle" data-bs-toggle = "dropdown" aria-expanded = "false" data-bs-display = "static" >
< span class = "d-lg-none" aria-hidden = "true" > Bootstrap< / span > < span class = "visually-hidden" > Bootstrap < / span > v5.3 < span class = "visually-hidden" > (switch to other versions)< / span >
< / button >
< ul class = "dropdown-menu dropdown-menu-end" >
< li > < h6 class = "dropdown-header" > v5 releases< / h6 > < / li >
< li >
< a class = "dropdown-item d-flex align-items-center justify-content-between active" aria-current = "true" href = "/docs/5.3/customize/optimize/" >
Latest (5.3.x)
< svg class = "bi" > < use xlink:href = "#check2" > < / use > < / svg >
< / a >
< / li >
< li >
< a class = "dropdown-item" href = "https://getbootstrap.com/docs/5.2/customize/optimize/" > v5.2.3< / a >
< / li >
< li >
< a class = "dropdown-item" href = "https://getbootstrap.com/docs/5.1/customize/optimize/" > v5.1.3< / a >
< / li >
< li >
< a class = "dropdown-item" href = "https://getbootstrap.com/docs/5.0/customize/optimize/" > v5.0.2< / a >
< / li >
< li > < hr class = "dropdown-divider" > < / li >
< li > < h6 class = "dropdown-header" > Previous releases< / h6 > < / li >
< li > < a class = "dropdown-item" href = "https://getbootstrap.com/docs/4.6/" > v4.6.x< / a > < / li >
< li > < a class = "dropdown-item" href = "https://getbootstrap.com/docs/3.4/" > v3.4.1< / a > < / li >
< li > < a class = "dropdown-item" href = "https://getbootstrap.com/2.3.2/" > v2.3.2< / a > < / li >
< li > < hr class = "dropdown-divider" > < / li >
< li > < a class = "dropdown-item" href = "/docs/versions/" > All versions< / a > < / li >
< / ul >
< / li >
< li class = "nav-item py-2 py-lg-1 col-12 col-lg-auto" >
< div class = "vr d-none d-lg-flex h-100 mx-lg-2 text-white" > < / div >
< hr class = "d-lg-none my-2 text-white-50" >
< / li >
< li class = "nav-item dropdown" >
< button class = "btn btn-link nav-link py-2 px-0 px-lg-2 dropdown-toggle d-flex align-items-center"
id="bd-theme"
type="button"
aria-expanded="false"
data-bs-toggle="dropdown"
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data-bs-display="static"
aria-label="Toggle theme (auto)">
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< svg class = "bi my-1 theme-icon-active" > < use href = "#circle-half" > < / use > < / svg >
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< span class = "d-lg-none ms-2" id = "bd-theme-text" > Toggle theme< / span >
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< / button >
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< ul class = "dropdown-menu dropdown-menu-end" aria-labelledby = "bd-theme-text" >
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< li >
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< button type = "button" class = "dropdown-item d-flex align-items-center" data-bs-theme-value = "light" aria-pressed = "false" >
2024-02-20 17:22:07 +02:00
< svg class = "bi me-2 opacity-50" > < use href = "#sun-fill" > < / use > < / svg >
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Light
< svg class = "bi ms-auto d-none" > < use href = "#check2" > < / use > < / svg >
< / button >
< / li >
< li >
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< button type = "button" class = "dropdown-item d-flex align-items-center" data-bs-theme-value = "dark" aria-pressed = "false" >
2024-02-20 17:22:07 +02:00
< svg class = "bi me-2 opacity-50" > < use href = "#moon-stars-fill" > < / use > < / svg >
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Dark
< svg class = "bi ms-auto d-none" > < use href = "#check2" > < / use > < / svg >
< / button >
< / li >
< li >
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< button type = "button" class = "dropdown-item d-flex align-items-center active" data-bs-theme-value = "auto" aria-pressed = "true" >
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< svg class = "bi me-2 opacity-50" > < use href = "#circle-half" > < / use > < / svg >
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Auto
< svg class = "bi ms-auto d-none" > < use href = "#check2" > < / use > < / svg >
< / button >
< / li >
< / ul >
< / li >
< / ul >
< / div >
< / div >
< / nav >
< / header >
< div class = "container-xxl bd-gutter mt-3 my-md-4 bd-layout" >
< aside class = "bd-sidebar" >
< div class = "offcanvas-lg offcanvas-start" tabindex = "-1" id = "bdSidebar" aria-labelledby = "bdSidebarOffcanvasLabel" >
< div class = "offcanvas-header border-bottom" >
< h5 class = "offcanvas-title" id = "bdSidebarOffcanvasLabel" > Browse docs< / h5 >
< button type = "button" class = "btn-close" data-bs-dismiss = "offcanvas" aria-label = "Close" data-bs-target = "#bdSidebar" > < / button >
< / div >
< div class = "offcanvas-body" >
< nav class = "bd-links w-100" id = "bd-docs-nav" aria-label = "Docs navigation" > < ul class = "bd-links-nav list-unstyled mb-0 pb-3 pb-md-2 pe-lg-2" >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-indigo);" aria-hidden = "true" > < use xlink:href = "#book-half" > < / use > < / svg >
Getting started
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/getting-started/introduction/" class = "bd-links-link d-inline-block rounded" > Introduction< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/download/" class = "bd-links-link d-inline-block rounded" > Download< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/contents/" class = "bd-links-link d-inline-block rounded" > Contents< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/browsers-devices/" class = "bd-links-link d-inline-block rounded" > Browsers & devices< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/javascript/" class = "bd-links-link d-inline-block rounded" > JavaScript< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/webpack/" class = "bd-links-link d-inline-block rounded" > Webpack< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/parcel/" class = "bd-links-link d-inline-block rounded" > Parcel< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/vite/" class = "bd-links-link d-inline-block rounded" > Vite< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/accessibility/" class = "bd-links-link d-inline-block rounded" > Accessibility< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/rfs/" class = "bd-links-link d-inline-block rounded" > RFS< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/rtl/" class = "bd-links-link d-inline-block rounded" > RTL< / a > < / li >
< li > < a href = "/docs/5.3/getting-started/contribute/" class = "bd-links-link d-inline-block rounded" > Contribute< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-pink);" aria-hidden = "true" > < use xlink:href = "#palette2" > < / use > < / svg >
Customize
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/customize/overview/" class = "bd-links-link d-inline-block rounded" > Overview< / a > < / li >
< li > < a href = "/docs/5.3/customize/sass/" class = "bd-links-link d-inline-block rounded" > Sass< / a > < / li >
< li > < a href = "/docs/5.3/customize/options/" class = "bd-links-link d-inline-block rounded" > Options< / a > < / li >
< li > < a href = "/docs/5.3/customize/color/" class = "bd-links-link d-inline-block rounded" > Color< / a > < / li >
< li > < a href = "/docs/5.3/customize/color-modes/" class = "bd-links-link d-inline-block rounded" > Color modes< / a > < / li >
< li > < a href = "/docs/5.3/customize/components/" class = "bd-links-link d-inline-block rounded" > Components< / a > < / li >
< li > < a href = "/docs/5.3/customize/css-variables/" class = "bd-links-link d-inline-block rounded" > CSS variables< / a > < / li >
< li > < a href = "/docs/5.3/customize/optimize/" class = "bd-links-link d-inline-block rounded active" aria-current = "page" > Optimize< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-teal);" aria-hidden = "true" > < use xlink:href = "#grid-fill" > < / use > < / svg >
Layout
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/layout/breakpoints/" class = "bd-links-link d-inline-block rounded" > Breakpoints< / a > < / li >
< li > < a href = "/docs/5.3/layout/containers/" class = "bd-links-link d-inline-block rounded" > Containers< / a > < / li >
< li > < a href = "/docs/5.3/layout/grid/" class = "bd-links-link d-inline-block rounded" > Grid< / a > < / li >
< li > < a href = "/docs/5.3/layout/columns/" class = "bd-links-link d-inline-block rounded" > Columns< / a > < / li >
< li > < a href = "/docs/5.3/layout/gutters/" class = "bd-links-link d-inline-block rounded" > Gutters< / a > < / li >
< li > < a href = "/docs/5.3/layout/utilities/" class = "bd-links-link d-inline-block rounded" > Utilities< / a > < / li >
< li > < a href = "/docs/5.3/layout/z-index/" class = "bd-links-link d-inline-block rounded" > Z-index< / a > < / li >
< li > < a href = "/docs/5.3/layout/css-grid/" class = "bd-links-link d-inline-block rounded" > CSS Grid< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-gray);" aria-hidden = "true" > < use xlink:href = "#file-earmark-richtext" > < / use > < / svg >
Content
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/content/reboot/" class = "bd-links-link d-inline-block rounded" > Reboot< / a > < / li >
< li > < a href = "/docs/5.3/content/typography/" class = "bd-links-link d-inline-block rounded" > Typography< / a > < / li >
< li > < a href = "/docs/5.3/content/images/" class = "bd-links-link d-inline-block rounded" > Images< / a > < / li >
< li > < a href = "/docs/5.3/content/tables/" class = "bd-links-link d-inline-block rounded" > Tables< / a > < / li >
< li > < a href = "/docs/5.3/content/figures/" class = "bd-links-link d-inline-block rounded" > Figures< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-blue);" aria-hidden = "true" > < use xlink:href = "#ui-radios" > < / use > < / svg >
Forms
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/forms/overview/" class = "bd-links-link d-inline-block rounded" > Overview< / a > < / li >
< li > < a href = "/docs/5.3/forms/form-control/" class = "bd-links-link d-inline-block rounded" > Form control< / a > < / li >
< li > < a href = "/docs/5.3/forms/select/" class = "bd-links-link d-inline-block rounded" > Select< / a > < / li >
< li > < a href = "/docs/5.3/forms/checks-radios/" class = "bd-links-link d-inline-block rounded" > Checks & radios< / a > < / li >
< li > < a href = "/docs/5.3/forms/range/" class = "bd-links-link d-inline-block rounded" > Range< / a > < / li >
< li > < a href = "/docs/5.3/forms/input-group/" class = "bd-links-link d-inline-block rounded" > Input group< / a > < / li >
< li > < a href = "/docs/5.3/forms/floating-labels/" class = "bd-links-link d-inline-block rounded" > Floating labels< / a > < / li >
< li > < a href = "/docs/5.3/forms/layout/" class = "bd-links-link d-inline-block rounded" > Layout< / a > < / li >
< li > < a href = "/docs/5.3/forms/validation/" class = "bd-links-link d-inline-block rounded" > Validation< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-cyan);" aria-hidden = "true" > < use xlink:href = "#menu-button-wide-fill" > < / use > < / svg >
Components
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/components/accordion/" class = "bd-links-link d-inline-block rounded" > Accordion< / a > < / li >
< li > < a href = "/docs/5.3/components/alerts/" class = "bd-links-link d-inline-block rounded" > Alerts< / a > < / li >
< li > < a href = "/docs/5.3/components/badge/" class = "bd-links-link d-inline-block rounded" > Badge< / a > < / li >
< li > < a href = "/docs/5.3/components/breadcrumb/" class = "bd-links-link d-inline-block rounded" > Breadcrumb< / a > < / li >
< li > < a href = "/docs/5.3/components/buttons/" class = "bd-links-link d-inline-block rounded" > Buttons< / a > < / li >
< li > < a href = "/docs/5.3/components/button-group/" class = "bd-links-link d-inline-block rounded" > Button group< / a > < / li >
< li > < a href = "/docs/5.3/components/card/" class = "bd-links-link d-inline-block rounded" > Card< / a > < / li >
< li > < a href = "/docs/5.3/components/carousel/" class = "bd-links-link d-inline-block rounded" > Carousel< / a > < / li >
< li > < a href = "/docs/5.3/components/close-button/" class = "bd-links-link d-inline-block rounded" > Close button< / a > < / li >
< li > < a href = "/docs/5.3/components/collapse/" class = "bd-links-link d-inline-block rounded" > Collapse< / a > < / li >
< li > < a href = "/docs/5.3/components/dropdowns/" class = "bd-links-link d-inline-block rounded" > Dropdowns< / a > < / li >
< li > < a href = "/docs/5.3/components/list-group/" class = "bd-links-link d-inline-block rounded" > List group< / a > < / li >
< li > < a href = "/docs/5.3/components/modal/" class = "bd-links-link d-inline-block rounded" > Modal< / a > < / li >
< li > < a href = "/docs/5.3/components/navbar/" class = "bd-links-link d-inline-block rounded" > Navbar< / a > < / li >
< li > < a href = "/docs/5.3/components/navs-tabs/" class = "bd-links-link d-inline-block rounded" > Navs & tabs< / a > < / li >
< li > < a href = "/docs/5.3/components/offcanvas/" class = "bd-links-link d-inline-block rounded" > Offcanvas< / a > < / li >
< li > < a href = "/docs/5.3/components/pagination/" class = "bd-links-link d-inline-block rounded" > Pagination< / a > < / li >
< li > < a href = "/docs/5.3/components/placeholders/" class = "bd-links-link d-inline-block rounded" > Placeholders< / a > < / li >
< li > < a href = "/docs/5.3/components/popovers/" class = "bd-links-link d-inline-block rounded" > Popovers< / a > < / li >
< li > < a href = "/docs/5.3/components/progress/" class = "bd-links-link d-inline-block rounded" > Progress< / a > < / li >
< li > < a href = "/docs/5.3/components/scrollspy/" class = "bd-links-link d-inline-block rounded" > Scrollspy< / a > < / li >
< li > < a href = "/docs/5.3/components/spinners/" class = "bd-links-link d-inline-block rounded" > Spinners< / a > < / li >
< li > < a href = "/docs/5.3/components/toasts/" class = "bd-links-link d-inline-block rounded" > Toasts< / a > < / li >
< li > < a href = "/docs/5.3/components/tooltips/" class = "bd-links-link d-inline-block rounded" > Tooltips< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-orange);" aria-hidden = "true" > < use xlink:href = "#magic" > < / use > < / svg >
Helpers
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/helpers/clearfix/" class = "bd-links-link d-inline-block rounded" > Clearfix< / a > < / li >
< li > < a href = "/docs/5.3/helpers/color-background/" class = "bd-links-link d-inline-block rounded" > Color & background< / a > < / li >
< li > < a href = "/docs/5.3/helpers/colored-links/" class = "bd-links-link d-inline-block rounded" > Colored links< / a > < / li >
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< li > < a href = "/docs/5.3/helpers/focus-ring/" class = "bd-links-link d-inline-block rounded" > Focus ring< / a > < / li >
< li > < a href = "/docs/5.3/helpers/icon-link/" class = "bd-links-link d-inline-block rounded" > Icon link< / a > < / li >
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< li > < a href = "/docs/5.3/helpers/position/" class = "bd-links-link d-inline-block rounded" > Position< / a > < / li >
< li > < a href = "/docs/5.3/helpers/ratio/" class = "bd-links-link d-inline-block rounded" > Ratio< / a > < / li >
< li > < a href = "/docs/5.3/helpers/stacks/" class = "bd-links-link d-inline-block rounded" > Stacks< / a > < / li >
< li > < a href = "/docs/5.3/helpers/stretched-link/" class = "bd-links-link d-inline-block rounded" > Stretched link< / a > < / li >
< li > < a href = "/docs/5.3/helpers/text-truncation/" class = "bd-links-link d-inline-block rounded" > Text truncation< / a > < / li >
< li > < a href = "/docs/5.3/helpers/vertical-rule/" class = "bd-links-link d-inline-block rounded" > Vertical rule< / a > < / li >
< li > < a href = "/docs/5.3/helpers/visually-hidden/" class = "bd-links-link d-inline-block rounded" > Visually hidden< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-red);" aria-hidden = "true" > < use xlink:href = "#braces-asterisk" > < / use > < / svg >
Utilities
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/utilities/api/" class = "bd-links-link d-inline-block rounded" > API< / a > < / li >
< li > < a href = "/docs/5.3/utilities/background/" class = "bd-links-link d-inline-block rounded" > Background< / a > < / li >
< li > < a href = "/docs/5.3/utilities/borders/" class = "bd-links-link d-inline-block rounded" > Borders< / a > < / li >
< li > < a href = "/docs/5.3/utilities/colors/" class = "bd-links-link d-inline-block rounded" > Colors< / a > < / li >
< li > < a href = "/docs/5.3/utilities/display/" class = "bd-links-link d-inline-block rounded" > Display< / a > < / li >
< li > < a href = "/docs/5.3/utilities/flex/" class = "bd-links-link d-inline-block rounded" > Flex< / a > < / li >
< li > < a href = "/docs/5.3/utilities/float/" class = "bd-links-link d-inline-block rounded" > Float< / a > < / li >
< li > < a href = "/docs/5.3/utilities/interactions/" class = "bd-links-link d-inline-block rounded" > Interactions< / a > < / li >
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< li > < a href = "/docs/5.3/utilities/link/" class = "bd-links-link d-inline-block rounded" > Link< / a > < / li >
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< li > < a href = "/docs/5.3/utilities/object-fit/" class = "bd-links-link d-inline-block rounded" > Object fit< / a > < / li >
< li > < a href = "/docs/5.3/utilities/opacity/" class = "bd-links-link d-inline-block rounded" > Opacity< / a > < / li >
< li > < a href = "/docs/5.3/utilities/overflow/" class = "bd-links-link d-inline-block rounded" > Overflow< / a > < / li >
< li > < a href = "/docs/5.3/utilities/position/" class = "bd-links-link d-inline-block rounded" > Position< / a > < / li >
< li > < a href = "/docs/5.3/utilities/shadows/" class = "bd-links-link d-inline-block rounded" > Shadows< / a > < / li >
< li > < a href = "/docs/5.3/utilities/sizing/" class = "bd-links-link d-inline-block rounded" > Sizing< / a > < / li >
< li > < a href = "/docs/5.3/utilities/spacing/" class = "bd-links-link d-inline-block rounded" > Spacing< / a > < / li >
< li > < a href = "/docs/5.3/utilities/text/" class = "bd-links-link d-inline-block rounded" > Text< / a > < / li >
< li > < a href = "/docs/5.3/utilities/vertical-align/" class = "bd-links-link d-inline-block rounded" > Vertical align< / a > < / li >
< li > < a href = "/docs/5.3/utilities/visibility/" class = "bd-links-link d-inline-block rounded" > Visibility< / a > < / li >
< li > < a href = "/docs/5.3/utilities/z-index/" class = "bd-links-link d-inline-block rounded" > Z-index< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-blue);" aria-hidden = "true" > < use xlink:href = "#tools" > < / use > < / svg >
Extend
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/extend/approach/" class = "bd-links-link d-inline-block rounded" > Approach< / a > < / li >
< li > < a href = "/docs/5.3/extend/icons/" class = "bd-links-link d-inline-block rounded" > Icons< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-group py-2" >
< strong class = "bd-links-heading d-flex w-100 align-items-center fw-semibold" >
< svg class = "bi me-2" style = "color: var(--bs-indigo);" aria-hidden = "true" > < use xlink:href = "#globe2" > < / use > < / svg >
About
< / strong >
< ul class = "list-unstyled fw-normal pb-2 small" >
< li > < a href = "/docs/5.3/about/overview/" class = "bd-links-link d-inline-block rounded" > Overview< / a > < / li >
< li > < a href = "/docs/5.3/about/team/" class = "bd-links-link d-inline-block rounded" > Team< / a > < / li >
< li > < a href = "/docs/5.3/about/brand/" class = "bd-links-link d-inline-block rounded" > Brand< / a > < / li >
< li > < a href = "/docs/5.3/about/license/" class = "bd-links-link d-inline-block rounded" > License< / a > < / li >
< li > < a href = "/docs/5.3/about/translations/" class = "bd-links-link d-inline-block rounded" > Translations< / a > < / li >
< / ul >
< / li >
< li class = "bd-links-span-all mt-1 mb-3 mx-4 border-top" > < / li >
< li class = "bd-links-span-all" >
< a href = "/docs/5.3/migration/" class = "bd-links-link d-inline-block rounded small " >
Migration
< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / aside >
< main class = "bd-main order-1" >
< div class = "bd-intro pt-2 ps-lg-2" >
< div class = "d-md-flex flex-md-row-reverse align-items-center justify-content-between" >
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< div class = "mb-3 mb-md-0 d-flex text-nowrap" > < a class = "btn btn-sm btn-bd-light rounded-2" href = "https://github.com/twbs/bootstrap/blob/v5.3.3/site/content/docs/5.3/customize/optimize.md" title = "View and edit this file on GitHub" target = "_blank" rel = "noopener" >
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View on GitHub
< / a >
< / div >
< h1 class = "bd-title mb-0" id = "content" > Optimize< / h1 >
< / div >
< p class = "bd-lead" > Keep your projects lean, responsive, and maintainable so you can deliver the best experience and focus on more important jobs.< / p >
< script async src = "https://cdn.carbonads.com/carbon.js?serve=CKYIKKJL&placement=getbootstrapcom" id = "_carbonads_js" > < / script >
< / div >
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< div class = "bd-toc mt-3 mb-5 my-lg-0 mb-lg-5 px-sm-1 text-body-secondary" >
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< button class = "btn btn-link p-md-0 mb-2 mb-md-0 text-decoration-none bd-toc-toggle d-md-none" type = "button" data-bs-toggle = "collapse" data-bs-target = "#tocContents" aria-expanded = "false" aria-controls = "tocContents" >
On this page
< svg class = "bi d-md-none ms-2" aria-hidden = "true" > < use xlink:href = "#chevron-expand" > < / use > < / svg >
< / button >
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< strong class = "d-none d-md-block h6 my-2 ms-3" > On this page< / strong >
< hr class = "d-none d-md-block my-2 ms-3" >
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< div class = "collapse bd-toc-collapse" id = "tocContents" >
< nav id = "TableOfContents" >
< ul >
< li > < a href = "#lean-sass-imports" > Lean Sass imports< / a > < / li >
< li > < a href = "#lean-javascript" > Lean JavaScript< / a > < / li >
< li > < a href = "#autoprefixer-browserslistrc" > Autoprefixer .browserslistrc< / a > < / li >
< li > < a href = "#unused-css" > Unused CSS< / a > < / li >
< li > < a href = "#minify-and-gzip" > Minify and gzip< / a > < / li >
< li > < a href = "#non-blocking-files" > Non-blocking files< / a > < / li >
< li > < a href = "#always-use-https" > Always use HTTPS< / a > < / li >
< / ul >
< / nav >
< / div >
< / div >
< div class = "bd-content ps-lg-2" >
< h2 id = "lean-sass-imports" > Lean Sass imports < a class = "anchor-link" href = "#lean-sass-imports" aria-label = "Link to this section: Lean Sass imports" > < / a > < / h2 >
< p > When using Sass in your asset pipeline, make sure you optimize Bootstrap by only < code > @import< / code > ing the components you need. Your largest optimizations will likely come from the < code > Layout & Components< / code > section of our < code > bootstrap.scss< / code > .< / p >
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< div class = "bd-example-snippet bd-code-snippet bd-file-ref" >
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< div class = "d-flex align-items-center highlight-toolbar ps-3 pe-2 py-1 border-bottom" >
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< a class = "font-monospace link-secondary link-underline-secondary link-underline-opacity-0 link-underline-opacity-100-hover small" href = "https://github.com/twbs/bootstrap/blob/v5.3.3/scss/bootstrap.scss" > scss/bootstrap.scss< / a >
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< div class = "d-flex ms-auto" >
< button type = "button" class = "btn-clipboard mt-0 me-0" title = "Copy to clipboard" >
< svg class = "bi" aria-hidden = "true" > < use xlink:href = "#clipboard" / > < / svg >
< / button >
< / div >
< / div > < div class = "highlight" > < pre tabindex = "0" class = "chroma" > < code class = "language-scss" data-lang = "scss" > < span class = "line" > < span class = "cl" > < span class = "c1" > // Configuration
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< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span > < span class = "k" > @import< / span > < span class = "s2" > " functions" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " variables" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " variables-dark" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " maps" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " mixins" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " utilities" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // Layout & components
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span > < span class = "k" > @import< / span > < span class = "s2" > " root" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " reboot" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " type" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " images" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " containers" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " grid" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " tables" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " forms" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " buttons" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " transitions" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " dropdown" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " button-group" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " nav" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " navbar" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " card" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " accordion" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " breadcrumb" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " pagination" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " badge" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " alert" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " progress" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " list-group" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " close" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " toasts" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " modal" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " tooltip" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " popover" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " carousel" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " spinners" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " offcanvas" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "k" > @import< / span > < span class = "s2" > " placeholders" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // Helpers
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span > < span class = "k" > @import< / span > < span class = "s2" > " helpers" < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // Utilities
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span > < span class = "k" > @import< / span > < span class = "s2" > " utilities/api" < / span > < span class = "p" > ;< / span >
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< / span > < / span > < / code > < / pre > < / div > < / div >
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< p > If you’ re not using a component, comment it out or delete it entirely. For example, if you’ re not using the carousel, remove that import to save some file size in your compiled CSS. Keep in mind there are some dependencies across Sass imports that may make it more difficult to omit a file.< / p >
< h2 id = "lean-javascript" > Lean JavaScript < a class = "anchor-link" href = "#lean-javascript" aria-label = "Link to this section: Lean JavaScript" > < / a > < / h2 >
< p > Bootstrap’ s JavaScript includes every component in our primary dist files (< code > bootstrap.js< / code > and < code > bootstrap.min.js< / code > ), and even our primary dependency (Popper) with our bundle files (< code > bootstrap.bundle.js< / code > and < code > bootstrap.bundle.min.js< / code > ). While you’ re customizing via Sass, be sure to remove related JavaScript.< / p >
< p > For instance, assuming you’ re using your own JavaScript bundler like Webpack, Parcel, or Vite, you’ d only import the JavaScript you plan on using. In the example below, we show how to just include our modal JavaScript:< / p >
<!-- eslint - skip -->
< div class = "highlight" > < pre tabindex = "0" class = "chroma" > < code class = "language-js" data-lang = "js" > < span class = "line" > < span class = "cl" > < span class = "c1" > // Import just what we need
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/alert' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/button' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/carousel' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/collapse' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/dropdown' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > < / span > < span class = "kr" > import< / span > < span class = "s1" > ' bootstrap/js/dist/modal' < / span > < span class = "p" > ;< / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/offcanvas' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/popover' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/scrollspy' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/tab' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/toast' ;
< / span > < / span > < / span > < span class = "line" > < span class = "cl" > < span class = "c1" > // import ' bootstrap/js/dist/tooltip' ;
< / span > < / span > < / span > < / code > < / pre > < / div > < p > This way, you’ re not including any JavaScript you don’ t intend to use for components like buttons, carousels, and tooltips. If you’ re importing dropdowns, tooltips or popovers, be sure to list the Popper dependency in your < code > package.json< / code > file.< / p >
< div class = "bd-callout bd-callout-info" >
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< p > < strong > Heads up!< / strong > Files in < code > bootstrap/js/dist< / code > use the < strong > default export< / strong > . To use them, do the following:< / p >
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<!-- eslint - skip -->
< div class = "highlight" > < pre tabindex = "0" class = "chroma" > < code class = "language-js" data-lang = "js" > < span class = "line" > < span class = "cl" > < span class = "kr" > import< / span > < span class = "nx" > Modal< / span > < span class = "nx" > from< / span > < span class = "s1" > ' bootstrap/js/dist/modal' < / span >
< / span > < / span > < span class = "line" > < span class = "cl" > < span class = "kr" > const< / span > < span class = "nx" > modal< / span > < span class = "o" > =< / span > < span class = "k" > new< / span > < span class = "nx" > Modal< / span > < span class = "p" > (< / span > < span class = "nb" > document< / span > < span class = "p" > .< / span > < span class = "nx" > getElementById< / span > < span class = "p" > (< / span > < span class = "s1" > ' myModal' < / span > < span class = "p" > ))< / span >
< / span > < / span > < / code > < / pre > < / div >
< / div >
< h2 id = "autoprefixer-browserslistrc" > Autoprefixer .browserslistrc < a class = "anchor-link" href = "#autoprefixer-browserslistrc" aria-label = "Link to this section: Autoprefixer .browserslistrc" > < / a > < / h2 >
< p > Bootstrap depends on Autoprefixer to automatically add browser prefixes to certain CSS properties. Prefixes are dictated by our < code > .browserslistrc< / code > file, found in the root of the Bootstrap repo. Customizing this list of browsers and recompiling the Sass will automatically remove some CSS from your compiled CSS, if there are vendor prefixes unique to that browser or version.< / p >
< h2 id = "unused-css" > Unused CSS < a class = "anchor-link" href = "#unused-css" aria-label = "Link to this section: Unused CSS" > < / a > < / h2 >
< p > < em > Help wanted with this section, please consider opening a PR. Thanks!< / em > < / p >
< p > While we don’ t have a prebuilt example for using < a href = "https://github.com/FullHuman/purgecss" > PurgeCSS< / a > with Bootstrap, there are some helpful articles and walkthroughs that the community has written. Here are some options:< / p >
< ul >
< li > < a href = "https://medium.com/dwarves-foundation/remove-unused-css-styles-from-bootstrap-using-purgecss-88395a2c5772" > https://medium.com/dwarves-foundation/remove-unused-css-styles-from-bootstrap-using-purgecss-88395a2c5772< / a > < / li >
< li > < a href = "https://lukelowrey.com/automatically-removeunused-css-from-bootstrap-or-other-frameworks/" > https://lukelowrey.com/automatically-removeunused-css-from-bootstrap-or-other-frameworks/< / a > < / li >
< / ul >
< p > Lastly, this < a href = "https://css-tricks.com/how-do-you-remove-unused-css-from-a-site/" > CSS Tricks article on unused CSS< / a > shows how to use PurgeCSS and other similar tools.< / p >
< h2 id = "minify-and-gzip" > Minify and gzip < a class = "anchor-link" href = "#minify-and-gzip" aria-label = "Link to this section: Minify and gzip" > < / a > < / h2 >
< p > Whenever possible, be sure to compress all the code you serve to your visitors. If you’ re using Bootstrap dist files, try to stick to the minified versions (indicated by the < code > .min.css< / code > and < code > .min.js< / code > extensions). If you’ re building Bootstrap from the source with your own build system, be sure to implement your own minifiers for HTML, CSS, and JS.< / p >
< h2 id = "non-blocking-files" > Non-blocking files < a class = "anchor-link" href = "#non-blocking-files" aria-label = "Link to this section: Non-blocking files" > < / a > < / h2 >
< p > While minifying and using compression might seem like enough, making your files non-blocking ones is also a big step in making your site well-optimized and fast enough.< / p >
< p > If you are using a < a href = "https://developer.chrome.com/docs/lighthouse/overview/" > Lighthouse< / a > plugin in Google Chrome, you may have stumbled over FCP. < a href = "https://web.dev/fcp/" > The First Contentful Paint< / a > metric measures the time from when the page starts loading to when any part of the page’ s content is rendered on the screen.< / p >
< p > You can improve FCP by deferring non-critical JavaScript or CSS. What does that mean? Simply, JavaScript or stylesheets that don’ t need to be present on the first paint of your page should be marked with < code > async< / code > or < code > defer< / code > attributes.< / p >
< p > This ensures that the less important resources are loaded later and not blocking the first paint. On the other hand, critical resources can be included as inline scripts or styles.< / p >
< p > If you want to learn more about this, there are already a lot of great articles about it:< / p >
< ul >
< li > < a href = "https://web.dev/render-blocking-resources/" > https://web.dev/render-blocking-resources/< / a > < / li >
< li > < a href = "https://web.dev/defer-non-critical-css/" > https://web.dev/defer-non-critical-css/< / a > < / li >
< / ul >
< h2 id = "always-use-https" > Always use HTTPS < a class = "anchor-link" href = "#always-use-https" aria-label = "Link to this section: Always use HTTPS" > < / a > < / h2 >
< p > Your website should only be available over HTTPS connections in production. HTTPS improves the security, privacy, and availability of all sites, and < a href = "https://https.cio.gov/everything/" > there is no such thing as non-sensitive web traffic< / a > . The steps to configure your website to be served exclusively over HTTPS vary widely depending on your architecture and web hosting provider, and thus are beyond the scope of these docs.< / p >
< p > Sites served over HTTPS should also access all stylesheets, scripts, and other assets over HTTPS connections. Otherwise, you’ ll be sending users < a href = "https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content" > mixed active content< / a > , leading to potential vulnerabilities where a site can be compromised by altering a dependency. This can lead to security issues and in-browser warnings displayed to users. Whether you’ re getting Bootstrap from a CDN or serving it yourself, ensure that you only access it over HTTPS connections.< / p >
< / div >
< / main >
< / div >
< footer class = "bd-footer py-4 py-md-5 mt-5 bg-body-tertiary" >
< div class = "container py-4 py-md-5 px-4 px-md-3 text-body-secondary" >
< div class = "row" >
< div class = "col-lg-3 mb-3" >
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< a class = "d-inline-flex align-items-center mb-2 text-body-emphasis text-decoration-none" href = "/" aria-label = "Bootstrap" >
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< svg xmlns = "http://www.w3.org/2000/svg" width = "40" height = "32" class = "d-block me-2" viewBox = "0 0 118 94" role = "img" > < title > Bootstrap< / title > < path fill-rule = "evenodd" clip-rule = "evenodd" d = "M24.509 0c-6.733 0-11.715 5.893-11.492 12.284.214 6.14-.064 14.092-2.066 20.577C8.943 39.365 5.547 43.485 0 44.014v5.972c5.547.529 8.943 4.649 10.951 11.153 2.002 6.485 2.28 14.437 2.066 20.577C12.794 88.106 17.776 94 24.51 94H93.5c6.733 0 11.714-5.893 11.491-12.284-.214-6.14.064-14.092 2.066-20.577 2.009-6.504 5.396-10.624 10.943-11.153v-5.972c-5.547-.529-8.934-4.649-10.943-11.153-2.002-6.484-2.28-14.437-2.066-20.577C105.214 5.894 100.233 0 93.5 0H24.508zM80 57.863C80 66.663 73.436 72 62.543 72H44a2 2 0 01-2-2V24a2 2 0 012-2h18.437c9.083 0 15.044 4.92 15.044 12.474 0 5.302-4.01 10.049-9.119 10.88v.277C75.317 46.394 80 51.21 80 57.863zM60.521 28.34H49.948v14.934h8.905c6.884 0 10.68-2.772 10.68-7.727 0-4.643-3.264-7.207-9.012-7.207zM49.948 49.2v16.458H60.91c7.167 0 10.964-2.876 10.964-8.281 0-5.406-3.903-8.178-11.425-8.178H49.948z" fill = "currentColor" / > < / svg >
< span class = "fs-5" > Bootstrap< / span >
< / a >
< ul class = "list-unstyled small" >
< li class = "mb-2" > Designed and built with all the love in the world by the < a href = "/docs/5.3/about/team/" > Bootstrap team< / a > with the help of < a href = "https://github.com/twbs/bootstrap/graphs/contributors" > our contributors< / a > .< / li >
< li class = "mb-2" > Code licensed < a href = "https://github.com/twbs/bootstrap/blob/main/LICENSE" target = "_blank" rel = "license noopener" > MIT< / a > , docs < a href = "https://creativecommons.org/licenses/by/3.0/" target = "_blank" rel = "license noopener" > CC BY 3.0< / a > .< / li >
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< li class = "mb-2" > Currently v5.3.3.< / li >
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< / ul >
< / div >
< div class = "col-6 col-lg-2 offset-lg-1 mb-3" >
< h5 > Links< / h5 >
< ul class = "list-unstyled" >
< li class = "mb-2" > < a href = "/" > Home< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/" > Docs< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/examples/" > Examples< / a > < / li >
< li class = "mb-2" > < a href = "https://icons.getbootstrap.com/" > Icons< / a > < / li >
< li class = "mb-2" > < a href = "https://themes.getbootstrap.com/" > Themes< / a > < / li >
< li class = "mb-2" > < a href = "https://blog.getbootstrap.com/" > Blog< / a > < / li >
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< li class = "mb-2" > < a href = "https://cottonbureau.com/people/bootstrap" target = "_blank" rel = "noopener" > Swag Store< / a > < / li >
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< / ul >
< / div >
< div class = "col-6 col-lg-2 mb-3" >
< h5 > Guides< / h5 >
< ul class = "list-unstyled" >
< li class = "mb-2" > < a href = "/docs/5.3/getting-started/" > Getting started< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/examples/starter-template/" > Starter template< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/getting-started/webpack/" > Webpack< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/getting-started/parcel/" > Parcel< / a > < / li >
< li class = "mb-2" > < a href = "/docs/5.3/getting-started/vite/" > Vite< / a > < / li >
< / ul >
< / div >
< div class = "col-6 col-lg-2 mb-3" >
< h5 > Projects< / h5 >
< ul class = "list-unstyled" >
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< li class = "mb-2" > < a href = "https://github.com/twbs/bootstrap" target = "_blank" rel = "noopener" > Bootstrap 5< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/twbs/bootstrap/tree/v4-dev" target = "_blank" rel = "noopener" > Bootstrap 4< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/twbs/icons" target = "_blank" rel = "noopener" > Icons< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/twbs/rfs" target = "_blank" rel = "noopener" > RFS< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/twbs/examples/" target = "_blank" rel = "noopener" > Examples repo< / a > < / li >
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< / ul >
< / div >
< div class = "col-6 col-lg-2 mb-3" >
< h5 > Community< / h5 >
< ul class = "list-unstyled" >
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< li class = "mb-2" > < a href = "https://github.com/twbs/bootstrap/issues" target = "_blank" rel = "noopener" > Issues< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/twbs/bootstrap/discussions" target = "_blank" rel = "noopener" > Discussions< / a > < / li >
< li class = "mb-2" > < a href = "https://github.com/sponsors/twbs" target = "_blank" rel = "noopener" > Corporate sponsors< / a > < / li >
< li class = "mb-2" > < a href = "https://opencollective.com/bootstrap" target = "_blank" rel = "noopener" > Open Collective< / a > < / li >
< li class = "mb-2" > < a href = "https://stackoverflow.com/questions/tagged/bootstrap-5" target = "_blank" rel = "noopener" > Stack Overflow< / a > < / li >
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< / ul >
< / div >
< / div >
< / div >
< / footer >
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< script src = "/docs/5.3/dist/js/bootstrap.bundle.min.js" integrity = "sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin = "anonymous" > < / script >
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< script src = "https://cdn.jsdelivr.net/npm/@docsearch/js@3" > < / script >
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< script src = "https://cdn.jsdelivr.net/npm/@stackblitz/sdk@1/bundles/sdk.umd.js" > < / script >
< script src = "/docs/5.3/assets/js/docs.min.js" > < / script >
< script >
document.querySelectorAll('.btn-edit').forEach(btn => {
btn.addEventListener('click', event => {
const htmlSnippet = event.target.closest('.bd-code-snippet').querySelector('.bd-example').innerHTML
const classes = Array.from(event.target.closest('.bd-code-snippet').querySelector('.bd-example').classList).join(' ')
const jsSnippet = event.target.closest('.bd-code-snippet').querySelector('.btn-edit').getAttribute('data-sb-js-snippet')
StackBlitzSDK.openBootstrapSnippet(htmlSnippet, jsSnippet, classes)
})
})
StackBlitzSDK.openBootstrapSnippet = (htmlSnippet, jsSnippet, classes) => {
const markup = `<!doctype html>
< html lang = "en" >
< head >
< meta charset = "utf-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1" >
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< link href = "https:\/\/cdn.jsdelivr.net\/npm\/bootstrap@5.3.3\/dist\/css\/bootstrap.min.css" rel = "stylesheet" >
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< link href = "https://getbootstrap.com/docs/5.3/assets/css/docs.css" rel = "stylesheet" >
< title > Bootstrap Example< / title >
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< ${'script'} src="https:\/\/cdn.jsdelivr.net\/npm\/bootstrap@5.3.3\/dist\/js\/bootstrap.bundle.min.js">< /${'script'}>
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< / head >
< body class = "p-3 m-0 border-0 ${classes}" >
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\x3C!-- Example Code -->
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${htmlSnippet.replace(/^/gm, ' ')}
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\x3C!-- End Example Code -->
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< / body >
< / html > `
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const jsSnippetContent = jsSnippet ? '\/\/ NOTICE!!! Initially embedded in our docs this JavaScript\n\/\/ file contains elements that can help you create reproducible\n\/\/ use cases in StackBlitz for instance.\n\/\/ In a real project please adapt this content to your needs.\n\/\/ \u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\u002b\n\n\/*!\n * JavaScript for Bootstrap\u0027s docs (https:\/\/getbootstrap.com\/)\n * Copyright 2011-2024 The Bootstrap Authors\n * Licensed under the Creative Commons Attribution 3.0 Unported License.\n * For details, see https:\/\/creativecommons.org\/licenses\/by\/3.0\/.\n *\/\n\n\/* global bootstrap: false *\/\n\n(() =\u003e {\n \u0027use strict\u0027\n\n \/\/ --------\n \/\/ Tooltips\n \/\/ --------\n \/\/ Instantiate all tooltips in a docs or StackBlitz\n document.querySelectorAll(\u0027[data-bs-toggle=\u0022tooltip\u0022]\u0027)\n .forEach(tooltip =\u003e {\n new bootstrap.Tooltip(tooltip)\n })\n\n \/\/ --------\n \/\/ Popovers\n \/\/ --------\n \/\/ Instantiate all popovers in docs or StackBlitz\n document.querySelectorAll(\u0027[data-bs-toggle=\u0022popover\u0022]\u0027)\n .forEach(popover =\u003e {\n new bootstrap.Popover(popover)\n })\n\n \/\/ -------------------------------\n \/\/ Toasts\n \/\/ -------------------------------\n \/\/ Used by \u0027Placement\u0027 example in docs or StackBlitz\n const toastPlacement = document.getElementById(\u0027toastPlacement\u0027)\n if (toastPlacement) {\n document.getElementById(\u0027selectToastPlacement\u0027).addEventListener(\u0027change\u0027, function () {\n if (!toastPlacement.dataset.originalClass) {\n toastPlacement.dataset.originalClass = toastPlacement.className\n }\n\n toastPlacement.className = \u0060${toastPlacement.dataset.originalClass} ${this.value}\u0060\n })\n }\n\n \/\/ Instantiate all toasts in docs pages only\n document.querySelectorAll(\u0027.bd-example .toast\u0027)\n .forEach(toastNode =\u003e {\n const toast = new bootstrap.Toast(toastNode, {\n autohide: false\n })\n\n toast.show()\n })\n\n \/\/ Instantiate all toasts in docs pages only\n \/\/ js-docs-start live-toast\n const toastTrigger = document.getElementById(\u0027liveToastBtn\u0027)\n const toastLiveExample = document.getElementById(\u0027liveToast\u0027)\n\n if (toastTrigger) {\n const toastBootstrap = bootstrap.Toast.getOrCreateInstance(toastLiveExample)\n toastTrigger.addEventListener(\u0027click\u0027, () =\u003e {\n toastBootstrap.show()\n })\n }\n \/\/ js-docs-end live-toast\n\n \/\/ -------------------------------\n \/\/ Alerts\n \/\/ -------------------------------\n \/\/ Used in \u0027Show live alert\u0027 example in docs or StackBlitz\n\n \/\/ js-docs-start live-alert\n const alertPlaceholder = document.getElementById(\u0027liveAlertPlaceholder\u0027)\n const appendAlert = (message, type) =\u003e {\n const wrapper = document.createElement(\u0027div\u0027)\n wrapper.innerHTML = [\n \u0060\u003cdiv class=\u0022alert alert-${type} alert-dismissible\u0022 role=\u0022alert\u0022\u003e\u0060,\n \u0060 \u003cdiv\u003e${message}\u003c\/div\u003e\u0060,\n \u0027 \u003cbutton type=\u0022button\u0022 class=\u0022btn-close\u0022 data-bs-dismiss=\u0022alert\u0022 aria-label=\u0022Close\u0022\u003e\u003c\/button\u003e\u0027,\n \u0027\u003c\/div\u003e\u0027\n ].join(\u0027\u0027)\n\n alertPlaceholder.append(wrapper)\n }\n\n const alertTrigger = document.getElementById(\u0027liveAlertBtn\u0027)\n if (alertTrigger) {\n alertTrigger.addEventListener(\u0027click\u0027, () =\u003e {\n appendAlert(\u0027Nice, you triggered this alert message!\u0027, \u0027success\u0027)\n })\n }\n \/\/ js-docs-end live-alert\n\n \/\/ --------\n \/\/ Carousels\n \/\/ --------\n \/\/ Instantiate all non-autoplayi
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const project = {
files: {
'index.html': markup,
'index.js': jsSnippetContent
},
title: 'Bootstrap Example',
description: `Official example from ${window.location.href}`,
template: jsSnippet ? 'javascript' : 'html',
tags: ['bootstrap']
}
StackBlitzSDK.openProject(project, { openFile: 'index.html' })
}
< / script >
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< div class = "position-fixed" aria-hidden = "true" > < input type = "text" tabindex = "-1" > < / div >
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< / body >
< / html >
