mirror of
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531 lines
40 KiB
HTML
531 lines
40 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="description" content="Keep your projects lean, responsive, and maintainable so you can deliver the best experience and focus on more important jobs.">
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<meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
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<meta name="generator" content="Hugo 0.79.0">
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<meta name="docsearch:language" content="en">
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<meta name="docsearch:version" content="5.0">
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<title>Optimize · Bootstrap v5.0</title>
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<link rel="canonical" href="https://getbootstrap.com/docs/5.0/customize/optimize/">
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<!-- Bootstrap core CSS -->
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<link href="/docs/5.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
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<link href="/docs/5.0/assets/css/docs.css" rel="stylesheet">
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<!-- Favicons -->
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<link rel="apple-touch-icon" href="/docs/5.0/assets/img/favicons/apple-touch-icon.png" sizes="180x180">
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<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon-32x32.png" sizes="32x32" type="image/png">
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<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon-16x16.png" sizes="16x16" type="image/png">
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<link rel="manifest" href="/docs/5.0/assets/img/favicons/manifest.json">
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<link rel="mask-icon" href="/docs/5.0/assets/img/favicons/safari-pinned-tab.svg" color="#7952b3">
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<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon.ico">
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<meta name="theme-color" content="#7952b3">
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<!-- Twitter -->
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<meta name="twitter:card" content="summary">
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<meta name="twitter:site" content="@getbootstrap">
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<meta name="twitter:creator" content="@getbootstrap">
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<meta name="twitter:title" content="Optimize">
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<meta name="twitter:description" content="Keep your projects lean, responsive, and maintainable so you can deliver the best experience and focus on more important jobs.">
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<meta name="twitter:image" content="https://getbootstrap.com/docs/5.0/assets/brand/bootstrap-social.png">
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<!-- Facebook -->
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<meta property="og:url" content="https://getbootstrap.com/docs/5.0/customize/optimize/">
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<meta property="og:title" content="Optimize">
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<meta property="og:description" content="Keep your projects lean, responsive, and maintainable so you can deliver the best experience and focus on more important jobs.">
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<meta property="og:type" content="article">
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<meta property="og:image" content="https://getbootstrap.com/docs/5.0/assets/brand/bootstrap-social.png">
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<meta property="og:image:type" content="image/png">
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<meta property="og:image:width" content="1000">
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<meta property="og:image:height" content="500">
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<script>
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window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
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ga('create', 'UA-146052-10', 'getbootstrap.com');
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ga('set', 'anonymizeIp', true);
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ga('send', 'pageview');
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</script>
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<script async src="https://www.google-analytics.com/analytics.js"></script>
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</head>
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<body>
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<div class="skippy overflow-hidden">
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<div class="container-xl">
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<a class="visually-hidden-focusable d-inline-flex p-2 m-1" href="#content">Skip to main content</a>
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<a class="visually-hidden-focusable d-none d-md-inline-flex p-2 m-1" href="#bd-docs-nav">Skip to docs navigation</a>
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</div>
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</div>
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<header class="navbar navbar-expand-md navbar-dark bd-navbar">
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<nav class="container-xxl flex-wrap flex-md-nowrap" aria-label="Main navigation">
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<a class="navbar-brand p-0 me-2" href="/" aria-label="Bootstrap">
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<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>
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</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#bdNavbar" aria-controls="bdNavbar" aria-expanded="false" aria-label="Toggle navigation">
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<svg class="bi" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
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<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"/>
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</svg>
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</button>
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<div class="collapse navbar-collapse" id="bdNavbar">
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<ul class="navbar-nav flex-row flex-wrap bd-navbar-nav pt-2 py-md-0">
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Bootstrap');">Home</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2 active" aria-current="true" href="/docs/5.0/getting-started/introduction/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Docs');">Docs</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="/docs/5.0/examples/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Examples');">Examples</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://icons.getbootstrap.com/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Icons');" target="_blank" rel="noopener">Icons</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://themes.getbootstrap.com/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Themes');" target="_blank" rel="noopener">Themes</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://blog.getbootstrap.com/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Blog');" target="_blank" rel="noopener">Blog</a>
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</li>
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</ul>
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<hr class="d-md-none text-white-50">
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<ul class="navbar-nav flex-row flex-wrap ms-md-auto">
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://github.com/twbs" target="_blank" rel="noopener">
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<svg xmlns="http://www.w3.org/2000/svg" width="36" height="36" class="navbar-nav-svg d-inline-block align-text-top" 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>
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<small class="d-md-none ms-2">GitHub</small>
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</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://twitter.com/getbootstrap" target="_blank" rel="noopener">
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<svg xmlns="http://www.w3.org/2000/svg" width="36" height="36" class="navbar-nav-svg d-inline-block align-text-top" 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>
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<small class="d-md-none ms-2">Twitter</small>
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</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://bootstrap-slack.herokuapp.com/" target="_blank" rel="noopener">
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<svg xmlns="http://www.w3.org/2000/svg" width="36" height="36" class="navbar-nav-svg d-inline-block align-text-top" viewBox="0 0 512 512" role="img"><title>Slack</title><path fill="currentColor" d="M210.787 234.832l68.31-22.883 22.1 65.977-68.309 22.882z"/><path fill="currentColor" d="M490.54 185.6C437.7 9.59 361.6-31.34 185.6 21.46S-31.3 150.4 21.46 326.4 150.4 543.3 326.4 490.54 543.34 361.6 490.54 185.6zM401.7 299.8l-33.15 11.05 11.46 34.38c4.5 13.92-2.87 29.06-16.78 33.56-2.87.82-6.14 1.64-9 1.23a27.32 27.32 0 0 1-24.56-18l-11.46-34.38-68.36 22.92 11.46 34.38c4.5 13.92-2.87 29.06-16.78 33.56-2.87.82-6.14 1.64-9 1.23a27.32 27.32 0 0 1-24.56-18l-11.46-34.43-33.15 11.05c-2.87.82-6.14 1.64-9 1.23a27.32 27.32 0 0 1-24.56-18c-4.5-13.92 2.87-29.06 16.78-33.56l33.12-11.03-22.1-65.9-33.15 11.05c-2.87.82-6.14 1.64-9 1.23a27.32 27.32 0 0 1-24.56-18c-4.48-13.93 2.89-29.07 16.81-33.58l33.15-11.05-11.46-34.38c-4.5-13.92 2.87-29.06 16.78-33.56s29.06 2.87 33.56 16.78l11.46 34.38 68.36-22.92-11.46-34.38c-4.5-13.92 2.87-29.06 16.78-33.56s29.06 2.87 33.56 16.78l11.47 34.42 33.15-11.05c13.92-4.5 29.06 2.87 33.56 16.78s-2.87 29.06-16.78 33.56L329.7 194.6l22.1 65.9 33.15-11.05c13.92-4.5 29.06 2.87 33.56 16.78s-2.88 29.07-16.81 33.57z"/></svg>
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<small class="d-md-none ms-2">Slack</small>
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</a>
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</li>
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<li class="nav-item col-6 col-md-auto">
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<a class="nav-link p-2" href="https://opencollective.com/bootstrap" target="_blank" rel="noopener">
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<svg xmlns="http://www.w3.org/2000/svg" width="36" height="36" fill="currentColor" fill-rule="evenodd" class="navbar-nav-svg d-inline-block align-text-top" 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>
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<small class="d-md-none ms-2">Open Collective</small>
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</a>
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</li>
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</ul>
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<a class="btn btn-bd-download d-lg-inline-block my-2 my-md-0 ms-md-3" href="/docs/5.0/getting-started/download/">Download</a>
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</div>
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</nav>
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</header>
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<nav class="bd-subnavbar py-2" aria-label="Secondary navigation">
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<div class="container-xxl d-flex align-items-md-center">
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<form class="bd-search position-relative me-auto">
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<input type="search" class="form-control" id="search-input" placeholder="Search docs..." aria-label="Search docs for..." autocomplete="off" data-bd-docs-version="5.0">
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</form>
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<div class="dropdown ms-3">
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<button class="btn btn-bd-light dropdown-toggle" id="bd-versions" data-bs-toggle="dropdown" aria-expanded="false" data-bs-display="static">
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<span class="d-none d-lg-inline">Bootstrap</span> v5.0
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</button>
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<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="bd-versions">
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<li><a class="dropdown-item current" aria-current="true" href="/docs/5.0/">Latest (5.0.x)</a></li>
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<li><hr class="dropdown-divider"></li>
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<li><a class="dropdown-item" href="https://getbootstrap.com/docs/4.5/">v4.5.x</a></li>
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<li><a class="dropdown-item" href="https://getbootstrap.com/docs/3.4/">v3.4.1</a></li>
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<li><a class="dropdown-item" href="https://getbootstrap.com/2.3.2/">v2.3.2</a></li>
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<li><hr class="dropdown-divider"></li>
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<li><a class="dropdown-item" href="/docs/versions/">All versions</a></li>
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</ul>
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</div>
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<button class="btn bd-sidebar-toggle d-md-none py-0 px-1 ms-3 order-3 collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#bd-docs-nav" aria-controls="bd-docs-nav" aria-expanded="false" aria-label="Toggle docs navigation">
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<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" class="bi bi-expand" viewBox="0 0 16 16">
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<title>Expand</title>
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<path fill-rule="evenodd" d="M1 8a.5.5 0 0 1 .5-.5h13a.5.5 0 0 1 0 1h-13A.5.5 0 0 1 1 8zM7.646.146a.5.5 0 0 1 .708 0l2 2a.5.5 0 0 1-.708.708L8.5 1.707V5.5a.5.5 0 0 1-1 0V1.707L6.354 2.854a.5.5 0 1 1-.708-.708l2-2zM8 10a.5.5 0 0 1 .5.5v3.793l1.146-1.147a.5.5 0 0 1 .708.708l-2 2a.5.5 0 0 1-.708 0l-2-2a.5.5 0 0 1 .708-.708L7.5 14.293V10.5A.5.5 0 0 1 8 10z"/>
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</svg>
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<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" class="bi bi-collapse" viewBox="0 0 16 16">
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<title>Collapse</title>
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<path fill-rule="evenodd" d="M1 8a.5.5 0 0 1 .5-.5h13a.5.5 0 0 1 0 1h-13A.5.5 0 0 1 1 8zm7-8a.5.5 0 0 1 .5.5v3.793l1.146-1.147a.5.5 0 0 1 .708.708l-2 2a.5.5 0 0 1-.708 0l-2-2a.5.5 0 1 1 .708-.708L7.5 4.293V.5A.5.5 0 0 1 8 0zm-.5 11.707l-1.146 1.147a.5.5 0 0 1-.708-.708l2-2a.5.5 0 0 1 .708 0l2 2a.5.5 0 0 1-.708.708L8.5 11.707V15.5a.5.5 0 0 1-1 0v-3.793z"/>
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</svg>
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</button>
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</div>
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</nav>
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<div class="container-xxl my-md-4 bd-layout">
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<aside class="bd-sidebar">
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<nav class="collapse bd-links" id="bd-docs-nav" aria-label="Docs navigation"><ul class="list-unstyled mb-0 py-3 pt-md-1">
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<li class="mb-1">
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<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#getting-started-collapse" aria-expanded="false">
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Getting started
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</button>
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<div class="collapse" id="getting-started-collapse">
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<ul class="list-unstyled fw-normal pb-1 small">
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<li><a href="/docs/5.0/getting-started/introduction/" class="d-inline-flex align-items-center rounded">Introduction</a></li>
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<li><a href="/docs/5.0/getting-started/download/" class="d-inline-flex align-items-center rounded">Download</a></li>
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<li><a href="/docs/5.0/getting-started/contents/" class="d-inline-flex align-items-center rounded">Contents</a></li>
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<li><a href="/docs/5.0/getting-started/browsers-devices/" class="d-inline-flex align-items-center rounded">Browsers & devices</a></li>
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<li><a href="/docs/5.0/getting-started/javascript/" class="d-inline-flex align-items-center rounded">JavaScript</a></li>
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<li><a href="/docs/5.0/getting-started/build-tools/" class="d-inline-flex align-items-center rounded">Build tools</a></li>
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<li><a href="/docs/5.0/getting-started/webpack/" class="d-inline-flex align-items-center rounded">Webpack</a></li>
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<li><a href="/docs/5.0/getting-started/accessibility/" class="d-inline-flex align-items-center rounded">Accessibility</a></li>
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<li><a href="/docs/5.0/getting-started/rfs/" class="d-inline-flex align-items-center rounded">RFS</a></li>
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<li><a href="/docs/5.0/getting-started/rtl/" class="d-inline-flex align-items-center rounded">RTL</a></li>
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</ul>
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</div>
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</li>
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<li class="mb-1 active">
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<button class="btn d-inline-flex align-items-center rounded" data-bs-toggle="collapse" data-bs-target="#customize-collapse" aria-expanded="true" aria-current="true">
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Customize
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</button>
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<div class="collapse show" id="customize-collapse">
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<ul class="list-unstyled fw-normal pb-1 small">
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<li><a href="/docs/5.0/customize/overview/" class="d-inline-flex align-items-center rounded">Overview</a></li>
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<li><a href="/docs/5.0/customize/sass/" class="d-inline-flex align-items-center rounded">Sass</a></li>
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<li><a href="/docs/5.0/customize/options/" class="d-inline-flex align-items-center rounded">Options</a></li>
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<li><a href="/docs/5.0/customize/color/" class="d-inline-flex align-items-center rounded">Color</a></li>
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<li><a href="/docs/5.0/customize/components/" class="d-inline-flex align-items-center rounded">Components</a></li>
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<li><a href="/docs/5.0/customize/css-variables/" class="d-inline-flex align-items-center rounded">CSS variables</a></li>
|
|
<li><a href="/docs/5.0/customize/optimize/" class="d-inline-flex align-items-center rounded active" aria-current="page">Optimize</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#layout-collapse" aria-expanded="false">
|
|
Layout
|
|
</button>
|
|
<div class="collapse" id="layout-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/layout/breakpoints/" class="d-inline-flex align-items-center rounded">Breakpoints</a></li>
|
|
<li><a href="/docs/5.0/layout/containers/" class="d-inline-flex align-items-center rounded">Containers</a></li>
|
|
<li><a href="/docs/5.0/layout/grid/" class="d-inline-flex align-items-center rounded">Grid</a></li>
|
|
<li><a href="/docs/5.0/layout/columns/" class="d-inline-flex align-items-center rounded">Columns</a></li>
|
|
<li><a href="/docs/5.0/layout/gutters/" class="d-inline-flex align-items-center rounded">Gutters</a></li>
|
|
<li><a href="/docs/5.0/layout/utilities/" class="d-inline-flex align-items-center rounded">Utilities</a></li>
|
|
<li><a href="/docs/5.0/layout/z-index/" class="d-inline-flex align-items-center rounded">Z-index</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#content-collapse" aria-expanded="false">
|
|
Content
|
|
</button>
|
|
<div class="collapse" id="content-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/content/reboot/" class="d-inline-flex align-items-center rounded">Reboot</a></li>
|
|
<li><a href="/docs/5.0/content/typography/" class="d-inline-flex align-items-center rounded">Typography</a></li>
|
|
<li><a href="/docs/5.0/content/images/" class="d-inline-flex align-items-center rounded">Images</a></li>
|
|
<li><a href="/docs/5.0/content/tables/" class="d-inline-flex align-items-center rounded">Tables</a></li>
|
|
<li><a href="/docs/5.0/content/figures/" class="d-inline-flex align-items-center rounded">Figures</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#forms-collapse" aria-expanded="false">
|
|
Forms
|
|
</button>
|
|
<div class="collapse" id="forms-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/forms/overview/" class="d-inline-flex align-items-center rounded">Overview</a></li>
|
|
<li><a href="/docs/5.0/forms/form-control/" class="d-inline-flex align-items-center rounded">Form control</a></li>
|
|
<li><a href="/docs/5.0/forms/select/" class="d-inline-flex align-items-center rounded">Select</a></li>
|
|
<li><a href="/docs/5.0/forms/checks-radios/" class="d-inline-flex align-items-center rounded">Checks & radios</a></li>
|
|
<li><a href="/docs/5.0/forms/range/" class="d-inline-flex align-items-center rounded">Range</a></li>
|
|
<li><a href="/docs/5.0/forms/input-group/" class="d-inline-flex align-items-center rounded">Input group</a></li>
|
|
<li><a href="/docs/5.0/forms/floating-labels/" class="d-inline-flex align-items-center rounded">Floating labels</a></li>
|
|
<li><a href="/docs/5.0/forms/layout/" class="d-inline-flex align-items-center rounded">Layout</a></li>
|
|
<li><a href="/docs/5.0/forms/validation/" class="d-inline-flex align-items-center rounded">Validation</a></li>
|
|
</ul>
|
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</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#components-collapse" aria-expanded="false">
|
|
Components
|
|
</button>
|
|
<div class="collapse" id="components-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/components/accordion/" class="d-inline-flex align-items-center rounded">Accordion</a></li>
|
|
<li><a href="/docs/5.0/components/alerts/" class="d-inline-flex align-items-center rounded">Alerts</a></li>
|
|
<li><a href="/docs/5.0/components/badge/" class="d-inline-flex align-items-center rounded">Badge</a></li>
|
|
<li><a href="/docs/5.0/components/breadcrumb/" class="d-inline-flex align-items-center rounded">Breadcrumb</a></li>
|
|
<li><a href="/docs/5.0/components/buttons/" class="d-inline-flex align-items-center rounded">Buttons</a></li>
|
|
<li><a href="/docs/5.0/components/button-group/" class="d-inline-flex align-items-center rounded">Button group</a></li>
|
|
<li><a href="/docs/5.0/components/card/" class="d-inline-flex align-items-center rounded">Card</a></li>
|
|
<li><a href="/docs/5.0/components/carousel/" class="d-inline-flex align-items-center rounded">Carousel</a></li>
|
|
<li><a href="/docs/5.0/components/close-button/" class="d-inline-flex align-items-center rounded">Close button</a></li>
|
|
<li><a href="/docs/5.0/components/collapse/" class="d-inline-flex align-items-center rounded">Collapse</a></li>
|
|
<li><a href="/docs/5.0/components/dropdowns/" class="d-inline-flex align-items-center rounded">Dropdowns</a></li>
|
|
<li><a href="/docs/5.0/components/list-group/" class="d-inline-flex align-items-center rounded">List group</a></li>
|
|
<li><a href="/docs/5.0/components/modal/" class="d-inline-flex align-items-center rounded">Modal</a></li>
|
|
<li><a href="/docs/5.0/components/navs-tabs/" class="d-inline-flex align-items-center rounded">Navs & tabs</a></li>
|
|
<li><a href="/docs/5.0/components/navbar/" class="d-inline-flex align-items-center rounded">Navbar</a></li>
|
|
<li><a href="/docs/5.0/components/pagination/" class="d-inline-flex align-items-center rounded">Pagination</a></li>
|
|
<li><a href="/docs/5.0/components/popovers/" class="d-inline-flex align-items-center rounded">Popovers</a></li>
|
|
<li><a href="/docs/5.0/components/progress/" class="d-inline-flex align-items-center rounded">Progress</a></li>
|
|
<li><a href="/docs/5.0/components/scrollspy/" class="d-inline-flex align-items-center rounded">Scrollspy</a></li>
|
|
<li><a href="/docs/5.0/components/spinners/" class="d-inline-flex align-items-center rounded">Spinners</a></li>
|
|
<li><a href="/docs/5.0/components/toasts/" class="d-inline-flex align-items-center rounded">Toasts</a></li>
|
|
<li><a href="/docs/5.0/components/tooltips/" class="d-inline-flex align-items-center rounded">Tooltips</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#helpers-collapse" aria-expanded="false">
|
|
Helpers
|
|
</button>
|
|
<div class="collapse" id="helpers-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/helpers/clearfix/" class="d-inline-flex align-items-center rounded">Clearfix</a></li>
|
|
<li><a href="/docs/5.0/helpers/colored-links/" class="d-inline-flex align-items-center rounded">Colored links</a></li>
|
|
<li><a href="/docs/5.0/helpers/ratio/" class="d-inline-flex align-items-center rounded">Ratio</a></li>
|
|
<li><a href="/docs/5.0/helpers/position/" class="d-inline-flex align-items-center rounded">Position</a></li>
|
|
<li><a href="/docs/5.0/helpers/visually-hidden/" class="d-inline-flex align-items-center rounded">Visually hidden</a></li>
|
|
<li><a href="/docs/5.0/helpers/stretched-link/" class="d-inline-flex align-items-center rounded">Stretched link</a></li>
|
|
<li><a href="/docs/5.0/helpers/text-truncation/" class="d-inline-flex align-items-center rounded">Text truncation</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#utilities-collapse" aria-expanded="false">
|
|
Utilities
|
|
</button>
|
|
<div class="collapse" id="utilities-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/utilities/api/" class="d-inline-flex align-items-center rounded">API</a></li>
|
|
<li><a href="/docs/5.0/utilities/borders/" class="d-inline-flex align-items-center rounded">Borders</a></li>
|
|
<li><a href="/docs/5.0/utilities/colors/" class="d-inline-flex align-items-center rounded">Colors</a></li>
|
|
<li><a href="/docs/5.0/utilities/display/" class="d-inline-flex align-items-center rounded">Display</a></li>
|
|
<li><a href="/docs/5.0/utilities/flex/" class="d-inline-flex align-items-center rounded">Flex</a></li>
|
|
<li><a href="/docs/5.0/utilities/float/" class="d-inline-flex align-items-center rounded">Float</a></li>
|
|
<li><a href="/docs/5.0/utilities/interactions/" class="d-inline-flex align-items-center rounded">Interactions</a></li>
|
|
<li><a href="/docs/5.0/utilities/overflow/" class="d-inline-flex align-items-center rounded">Overflow</a></li>
|
|
<li><a href="/docs/5.0/utilities/position/" class="d-inline-flex align-items-center rounded">Position</a></li>
|
|
<li><a href="/docs/5.0/utilities/shadows/" class="d-inline-flex align-items-center rounded">Shadows</a></li>
|
|
<li><a href="/docs/5.0/utilities/sizing/" class="d-inline-flex align-items-center rounded">Sizing</a></li>
|
|
<li><a href="/docs/5.0/utilities/spacing/" class="d-inline-flex align-items-center rounded">Spacing</a></li>
|
|
<li><a href="/docs/5.0/utilities/text/" class="d-inline-flex align-items-center rounded">Text</a></li>
|
|
<li><a href="/docs/5.0/utilities/vertical-align/" class="d-inline-flex align-items-center rounded">Vertical align</a></li>
|
|
<li><a href="/docs/5.0/utilities/visibility/" class="d-inline-flex align-items-center rounded">Visibility</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#extend-collapse" aria-expanded="false">
|
|
Extend
|
|
</button>
|
|
<div class="collapse" id="extend-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/extend/approach/" class="d-inline-flex align-items-center rounded">Approach</a></li>
|
|
<li><a href="/docs/5.0/extend/icons/" class="d-inline-flex align-items-center rounded">Icons</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="mb-1">
|
|
<button class="btn d-inline-flex align-items-center rounded collapsed" data-bs-toggle="collapse" data-bs-target="#about-collapse" aria-expanded="false">
|
|
About
|
|
</button>
|
|
<div class="collapse" id="about-collapse">
|
|
<ul class="list-unstyled fw-normal pb-1 small">
|
|
<li><a href="/docs/5.0/about/overview/" class="d-inline-flex align-items-center rounded">Overview</a></li>
|
|
<li><a href="/docs/5.0/about/team/" class="d-inline-flex align-items-center rounded">Team</a></li>
|
|
<li><a href="/docs/5.0/about/brand/" class="d-inline-flex align-items-center rounded">Brand</a></li>
|
|
<li><a href="/docs/5.0/about/license/" class="d-inline-flex align-items-center rounded">License</a></li>
|
|
<li><a href="/docs/5.0/about/translations/" class="d-inline-flex align-items-center rounded">Translations</a></li>
|
|
</ul>
|
|
</div>
|
|
</li>
|
|
|
|
<li class="my-3 mx-4 border-top"></li>
|
|
<li>
|
|
<a href="/docs/5.0/migration/" class="d-inline-flex align-items-center rounded">
|
|
Migration
|
|
</a>
|
|
</li>
|
|
</ul>
|
|
</nav>
|
|
|
|
</aside>
|
|
|
|
<main class="bd-main order-1">
|
|
<div class="bd-intro ps-lg-4">
|
|
<div class="d-md-flex flex-md-row-reverse align-items-center justify-content-between">
|
|
<a class="btn btn-sm btn-bd-light mb-2 mb-md-0" href="https://github.com/twbs/bootstrap/blob/main/site/content/docs/5.0/customize/optimize.md" title="View and edit this file on GitHub" target="_blank" rel="noopener">View on GitHub</a>
|
|
<h1 class="bd-title" 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>
|
|
|
|
|
|
<div class="bd-toc mt-4 mb-5 my-md-0 ps-xl-3 mb-lg-5 text-muted">
|
|
<strong class="d-block h6 my-2 pb-2 border-bottom">On this page</strong>
|
|
<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="#nonblocking-files">Nonblocking files</a></li>
|
|
<li><a href="#always-use-https">Always use https</a></li>
|
|
</ul>
|
|
</nav>
|
|
</div>
|
|
|
|
|
|
<div class="bd-content ps-lg-4">
|
|
|
|
|
|
<h2 id="lean-sass-imports">Lean Sass imports</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>
|
|
<div class="highlight"><pre class="chroma"><code class="language-scss" data-lang="scss"><span class="c1">// Configuration
|
|
</span><span class="c1"></span><span class="k">@import</span> <span class="s2">"functions"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"variables"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"mixins"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"utilities"</span><span class="p">;</span>
|
|
|
|
<span class="c1">// Layout & components
|
|
</span><span class="c1"></span><span class="k">@import</span> <span class="s2">"root"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"reboot"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"type"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"images"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"containers"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"grid"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"tables"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"forms"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"buttons"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"transitions"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"dropdown"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"button-group"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"nav"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"navbar"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"card"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"accordion"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"breadcrumb"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"pagination"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"badge"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"alert"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"progress"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"list-group"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"close"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"toasts"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"modal"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"tooltip"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"popover"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"carousel"</span><span class="p">;</span>
|
|
<span class="k">@import</span> <span class="s2">"spinners"</span><span class="p">;</span>
|
|
|
|
<span class="c1">// Helpers
|
|
</span><span class="c1"></span><span class="k">@import</span> <span class="s2">"helpers"</span><span class="p">;</span>
|
|
|
|
<span class="c1">// Utilities
|
|
</span><span class="c1"></span><span class="k">@import</span> <span class="s2">"utilities/api"</span><span class="p">;</span></code></pre></div>
|
|
<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</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 or Rollup, you’d only import the JavaScript you plan on using. In the example below, we show how to just include our modal JavaScript:</p>
|
|
<div class="highlight"><pre class="chroma"><code class="language-js" data-lang="js"><span class="c1">// Import just what we need
|
|
</span><span class="c1"></span>
|
|
<span class="c1">// import 'bootstrap/js/dist/alert';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/button';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/carousel';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/collapse';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/dropdown';
|
|
</span><span class="c1"></span><span class="kr">import</span> <span class="s1">'bootstrap/js/dist/modal'</span><span class="p">;</span>
|
|
<span class="c1">// import 'bootstrap/js/dist/popover';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/scrollspy';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/tab';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/toast';
|
|
</span><span class="c1">// import 'bootstrap/js/dist/tooltip';
|
|
</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">
|
|
<h3 id="default-exports">Default Exports</h3>
|
|
<p>Files in <code>bootstrap/js/dist</code> use the <strong>default export</strong>, so if you want to use one of them you have to do the following:</p>
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<div class="highlight"><pre class="chroma"><code class="language-js" data-lang="js"><span class="kr">import</span> <span class="nx">Modal</span> <span class="nx">from</span> <span class="s1">'bootstrap/js/dist/modal'</span>
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<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>
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</code></pre></div>
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</div>
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<h2 id="autoprefixer-browserslistrc">Autoprefixer .browserslistrc</h2>
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<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>
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<h2 id="unused-css">Unused CSS</h2>
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<p><em>Help wanted with this section, please consider opening a PR. Thanks!</em></p>
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<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>
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<ul>
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<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>
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<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>
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</ul>
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<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>
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<h2 id="minify-and-gzip">Minify and gzip</h2>
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<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>
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<h2 id="nonblocking-files">Nonblocking files</h2>
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<p><em>Help wanted with this section, please consider opening a PR. Thanks!</em></p>
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<h2 id="always-use-https">Always use https</h2>
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<p><em>Help wanted with this section, please consider opening a PR. Thanks!</em></p>
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</div>
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</main>
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</div>
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<footer class="bd-footer p-3 p-md-5 mt-5 bg-light text-center text-sm-start">
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<div class="container">
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<ul class="bd-footer-links ps-0 mb-3">
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<li class="d-inline-block"><a href="https://github.com/twbs">GitHub</a></li>
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<li class="d-inline-block ms-3"><a href="https://twitter.com/getbootstrap">Twitter</a></li>
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<li class="d-inline-block ms-3"><a href="/docs/5.0/examples/">Examples</a></li>
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<li class="d-inline-block ms-3"><a href="/docs/5.0/about/overview/">About</a></li>
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</ul>
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<p class="mb-0">Designed and built with all the love in the world by the <a href="/docs/5.0/about/team/">Bootstrap team</a> with the help of <a href="https://github.com/twbs/bootstrap/graphs/contributors">our contributors</a>.</p>
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<p class="mb-0">Currently v5.0.0-beta1. 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>.</p>
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</div>
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</footer>
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<script src="/docs/5.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
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<script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>
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<script src="/docs/5.0/assets/js/docs.min.js"></script>
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</body>
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</html>
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