mirror of
https://github.com/twbs/bootstrap.git
synced 2024-12-04 16:24:22 +01:00
612 lines
12 KiB
SCSS
612 lines
12 KiB
SCSS
// stylelint-disable declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix
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// Reboot
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//
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// Normalization of HTML elements, manually forked from Normalize.css to remove
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// styles targeting irrelevant browsers while applying new styles.
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//
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// Normalize is licensed MIT. https://github.com/necolas/normalize.css
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// Document
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//
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// Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
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*,
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*::before,
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*::after {
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box-sizing: border-box;
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}
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// Root
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//
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// Ability to the value of the root font sizes, affecting the value of `rem`.
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// null by default, thus nothing is generated.
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:root {
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@if $font-size-root != null {
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@include font-size(var(--#{$prefix}root-font-size));
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}
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@if $enable-smooth-scroll {
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@media (prefers-reduced-motion: no-preference) {
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scroll-behavior: smooth;
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}
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}
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}
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// Body
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//
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// 1. Remove the margin in all browsers.
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// 2. As a best practice, apply a default `background-color`.
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// 3. Prevent adjustments of font size after orientation changes in iOS.
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// 4. Change the default tap highlight to be completely transparent in iOS.
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// scss-docs-start reboot-body-rules
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body {
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margin: 0; // 1
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font-family: var(--#{$prefix}body-font-family);
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@include font-size(var(--#{$prefix}body-font-size));
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font-weight: var(--#{$prefix}body-font-weight);
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line-height: var(--#{$prefix}body-line-height);
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color: var(--#{$prefix}body-color);
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text-align: var(--#{$prefix}body-text-align);
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background-color: var(--#{$prefix}body-bg); // 2
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-webkit-text-size-adjust: 100%; // 3
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-webkit-tap-highlight-color: rgba($black, 0); // 4
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}
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// scss-docs-end reboot-body-rules
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// Content grouping
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//
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// 1. Reset Firefox's gray color
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hr {
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margin: $hr-margin-y 0;
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color: $hr-color; // 1
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border: 0;
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border-top: $hr-border-width solid $hr-border-color;
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opacity: $hr-opacity;
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}
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// Typography
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//
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// 1. Remove top margins from headings
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// By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
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// margin for easier control within type scales as it avoids margin collapsing.
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%heading {
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margin-top: 0; // 1
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margin-bottom: $headings-margin-bottom;
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font-family: $headings-font-family;
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font-style: $headings-font-style;
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font-weight: $headings-font-weight;
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line-height: $headings-line-height;
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color: var(--#{$prefix}heading-color);
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}
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h1 {
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@extend %heading;
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@include font-size($h1-font-size);
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}
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h2 {
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@extend %heading;
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@include font-size($h2-font-size);
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}
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h3 {
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@extend %heading;
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@include font-size($h3-font-size);
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}
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h4 {
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@extend %heading;
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@include font-size($h4-font-size);
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}
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h5 {
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@extend %heading;
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@include font-size($h5-font-size);
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}
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h6 {
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@extend %heading;
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@include font-size($h6-font-size);
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}
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// Reset margins on paragraphs
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//
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// Similarly, the top margin on `<p>`s get reset. However, we also reset the
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// bottom margin to use `rem` units instead of `em`.
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p {
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margin-top: 0;
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margin-bottom: $paragraph-margin-bottom;
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}
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// Abbreviations
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//
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// 1. Add the correct text decoration in Chrome, Edge, Opera, and Safari.
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// 2. Add explicit cursor to indicate changed behavior.
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// 3. Prevent the text-decoration to be skipped.
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abbr[title] {
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text-decoration: underline dotted; // 1
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cursor: help; // 2
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text-decoration-skip-ink: none; // 3
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}
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// Address
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address {
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margin-bottom: 1rem;
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font-style: normal;
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line-height: inherit;
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}
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// Lists
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ol,
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ul {
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padding-left: 2rem;
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}
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ol,
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ul,
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dl {
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margin-top: 0;
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margin-bottom: 1rem;
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}
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ol ol,
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ul ul,
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ol ul,
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ul ol {
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margin-bottom: 0;
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}
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dt {
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font-weight: $dt-font-weight;
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}
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// 1. Undo browser default
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dd {
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margin-bottom: .5rem;
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margin-left: 0; // 1
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}
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// Blockquote
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blockquote {
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margin: 0 0 1rem;
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}
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// Strong
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//
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// Add the correct font weight in Chrome, Edge, and Safari
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b,
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strong {
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font-weight: $font-weight-bolder;
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}
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// Small
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//
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// Add the correct font size in all browsers
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small {
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@include font-size($small-font-size);
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}
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// Mark
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mark {
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padding: $mark-padding;
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color: var(--#{$prefix}highlight-color);
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background-color: var(--#{$prefix}highlight-bg);
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}
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// Sub and Sup
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//
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// Prevent `sub` and `sup` elements from affecting the line height in
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// all browsers.
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sub,
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sup {
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position: relative;
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@include font-size($sub-sup-font-size);
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line-height: 0;
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vertical-align: baseline;
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}
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sub { bottom: -.25em; }
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sup { top: -.5em; }
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// Links
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a {
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color: rgba(var(--#{$prefix}link-color-rgb), var(--#{$prefix}link-opacity, 1));
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text-decoration: $link-decoration;
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&:hover {
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--#{$prefix}link-color-rgb: var(--#{$prefix}link-hover-color-rgb);
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text-decoration: $link-hover-decoration;
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}
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}
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// And undo these styles for placeholder links/named anchors (without href).
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// It would be more straightforward to just use a[href] in previous block, but that
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// causes specificity issues in many other styles that are too complex to fix.
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// See https://github.com/twbs/bootstrap/issues/19402
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a:not([href]):not([class]) {
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&,
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&:hover {
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color: inherit;
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text-decoration: none;
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}
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}
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// Code
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pre,
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code,
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kbd,
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samp {
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font-family: $font-family-code;
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@include font-size(1em); // Correct the odd `em` font sizing in all browsers.
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}
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// 1. Remove browser default top margin
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// 2. Reset browser default of `1em` to use `rem`s
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// 3. Don't allow content to break outside
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pre {
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display: block;
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margin-top: 0; // 1
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margin-bottom: 1rem; // 2
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overflow: auto; // 3
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@include font-size($code-font-size);
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color: $pre-color;
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// Account for some code outputs that place code tags in pre tags
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code {
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@include font-size(inherit);
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color: inherit;
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word-break: normal;
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}
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}
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code {
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@include font-size($code-font-size);
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color: var(--#{$prefix}code-color);
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word-wrap: break-word;
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// Streamline the style when inside anchors to avoid broken underline and more
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a > & {
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color: inherit;
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}
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}
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kbd {
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padding: $kbd-padding-y $kbd-padding-x;
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@include font-size($kbd-font-size);
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color: $kbd-color;
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background-color: $kbd-bg;
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@include border-radius($border-radius-sm);
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kbd {
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padding: 0;
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@include font-size(1em);
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font-weight: $nested-kbd-font-weight;
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}
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}
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// Figures
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//
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// Apply a consistent margin strategy (matches our type styles).
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figure {
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margin: 0 0 1rem;
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}
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// Images and content
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img,
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svg {
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vertical-align: middle;
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}
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// Tables
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//
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// Prevent double borders
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table {
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caption-side: bottom;
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border-collapse: collapse;
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}
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caption {
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padding-top: $table-cell-padding-y;
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padding-bottom: $table-cell-padding-y;
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color: $table-caption-color;
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text-align: left;
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}
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// 1. Removes font-weight bold by inheriting
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// 2. Matches default `<td>` alignment by inheriting `text-align`.
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// 3. Fix alignment for Safari
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th {
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font-weight: $table-th-font-weight; // 1
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text-align: inherit; // 2
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text-align: -webkit-match-parent; // 3
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}
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thead,
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tbody,
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tfoot,
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tr,
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td,
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th {
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border-color: inherit;
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border-style: solid;
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border-width: 0;
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}
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// Forms
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//
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// 1. Allow labels to use `margin` for spacing.
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label {
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display: inline-block; // 1
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}
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// Remove the default `border-radius` that macOS Chrome adds.
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// See https://github.com/twbs/bootstrap/issues/24093
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button {
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// stylelint-disable-next-line property-disallowed-list
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border-radius: 0;
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}
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// Explicitly remove focus outline in Chromium when it shouldn't be
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// visible (e.g. as result of mouse click or touch tap). It already
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// should be doing this automatically, but seems to currently be
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// confused and applies its very visible two-tone outline anyway.
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button:focus:not(:focus-visible) {
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outline: 0;
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}
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// 1. Remove the margin in Firefox and Safari
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input,
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button,
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select,
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optgroup,
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textarea {
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margin: 0; // 1
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font-family: inherit;
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@include font-size(inherit);
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line-height: inherit;
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}
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// Remove the inheritance of text transform in Firefox
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button,
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select {
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text-transform: none;
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}
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// Set the cursor for non-`<button>` buttons
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//
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// Details at https://github.com/twbs/bootstrap/pull/30562
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[role="button"] {
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cursor: pointer;
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}
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select {
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// Remove the inheritance of word-wrap in Safari.
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// See https://github.com/twbs/bootstrap/issues/24990
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word-wrap: normal;
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// Undo the opacity change from Chrome
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&:disabled {
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opacity: 1;
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}
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}
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// Remove the dropdown arrow only from text type inputs built with datalists in Chrome.
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// See https://stackoverflow.com/a/54997118
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[list]:not([type="date"]):not([type="datetime-local"]):not([type="month"]):not([type="week"]):not([type="time"])::-webkit-calendar-picker-indicator {
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display: none !important;
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}
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// 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
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// controls in Android 4.
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// 2. Correct the inability to style clickable types in iOS and Safari.
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// 3. Opinionated: add "hand" cursor to non-disabled button elements.
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button,
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[type="button"], // 1
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[type="reset"],
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[type="submit"] {
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-webkit-appearance: button; // 2
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@if $enable-button-pointers {
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&:not(:disabled) {
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cursor: pointer; // 3
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}
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}
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}
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// Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
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::-moz-focus-inner {
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padding: 0;
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border-style: none;
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}
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// 1. Textareas should really only resize vertically so they don't break their (horizontal) containers.
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textarea {
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resize: vertical; // 1
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}
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// 1. Browsers set a default `min-width: min-content;` on fieldsets,
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// unlike e.g. `<div>`s, which have `min-width: 0;` by default.
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// So we reset that to ensure fieldsets behave more like a standard block element.
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// See https://github.com/twbs/bootstrap/issues/12359
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// and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
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// 2. Reset the default outline behavior of fieldsets so they don't affect page layout.
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fieldset {
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min-width: 0; // 1
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padding: 0; // 2
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margin: 0; // 2
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border: 0; // 2
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}
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// 1. By using `float: left`, the legend will behave like a block element.
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// This way the border of a fieldset wraps around the legend if present.
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// 2. Fix wrapping bug.
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// See https://github.com/twbs/bootstrap/issues/29712
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legend {
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float: left; // 1
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width: 100%;
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padding: 0;
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margin-bottom: $legend-margin-bottom;
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@include font-size($legend-font-size);
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font-weight: $legend-font-weight;
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line-height: inherit;
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+ * {
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clear: left; // 2
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}
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}
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// Fix height of inputs with a type of datetime-local, date, month, week, or time
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// See https://github.com/twbs/bootstrap/issues/18842
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::-webkit-datetime-edit-fields-wrapper,
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::-webkit-datetime-edit-text,
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::-webkit-datetime-edit-minute,
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::-webkit-datetime-edit-hour-field,
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::-webkit-datetime-edit-day-field,
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::-webkit-datetime-edit-month-field,
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::-webkit-datetime-edit-year-field {
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padding: 0;
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}
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::-webkit-inner-spin-button {
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height: auto;
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}
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// 1. This overrides the extra rounded corners on search inputs in iOS so that our
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// `.form-control` class can properly style them. Note that this cannot simply
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// be added to `.form-control` as it's not specific enough. For details, see
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// https://github.com/twbs/bootstrap/issues/11586.
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// 2. Correct the outline style in Safari.
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[type="search"] {
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-webkit-appearance: textfield; // 1
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outline-offset: -2px; // 2
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}
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// 1. A few input types should stay LTR
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// See https://rtlstyling.com/posts/rtl-styling#form-inputs
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// 2. RTL only output
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// See https://rtlcss.com/learn/usage-guide/control-directives/#raw
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/* rtl:raw:
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[type="tel"],
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[type="url"],
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[type="email"],
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[type="number"] {
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direction: ltr;
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}
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*/
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// Remove the inner padding in Chrome and Safari on macOS.
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::-webkit-search-decoration {
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-webkit-appearance: none;
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}
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// Remove padding around color pickers in webkit browsers
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::-webkit-color-swatch-wrapper {
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padding: 0;
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}
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// 1. Inherit font family and line height for file input buttons
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// 2. Correct the inability to style clickable types in iOS and Safari.
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::file-selector-button {
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font: inherit; // 1
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-webkit-appearance: button; // 2
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}
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// Correct element displays
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output {
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display: inline-block;
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}
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// Remove border from iframe
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iframe {
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border: 0;
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}
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// Summary
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//
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// 1. Add the correct display in all browsers
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summary {
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display: list-item; // 1
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cursor: pointer;
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}
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// Progress
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//
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// Add the correct vertical alignment in Chrome, Firefox, and Opera.
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progress {
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vertical-align: baseline;
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}
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// Hidden attribute
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//
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// Always hide an element with the `hidden` HTML attribute.
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[hidden] {
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display: none !important;
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}
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