下面展示了 6 个仓库代码，来说明现在 CSS 框架主要使用的样式重置方案：一个是 CSS Reset，一个是 CSS Normalize。其实两者并非是我们所想象的那样水火不容，相反，它们还能结合使用，用来获得更加舒适的样式控制体验。
modern-css-reset
现在已不再像 IE 6 时代那样，需要很重量的重置代码。现代浏览器对标准的兼容更加完善，各浏览器在样式表现上也更加统一，因此 CSS 重置代码也应该变得比以前更加轻量。
/* Box sizing rules */
*,
*::before,
*::after {
box-sizing: border-box;
}
/* Remove default padding */
ul[class],
ol[class] {
padding: 0;
}
/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
ul[class],
ol[class],
li,
figure,
figcaption,
blockquote,
dl,
dd {
margin: 0;
}
/* Set core body defaults */
body {
min-height: 100vh;
scroll-behavior: smooth;
text-rendering: optimizeSpeed;
line-height: 1.5;
}
/* Remove list styles on ul, ol elements with a class attribute */
ul[class],
ol[class] {
list-style: none;
}
/* A elements that don't have a class get default styles */
a:not([class]) {
text-decoration-skip-ink: auto;
}
/* Make images easier to work with */
img {
max-width: 100%;
display: block;
}
/* Natural flow and rhythm in articles by default */
article > * + * {
margin-top: 1em;
}
/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
font: inherit;
}
/* Remove all animations and transitions for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
* {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
scroll-behavior: auto !important;
}
}
minireset.css
以下是著名 CSS 框架 Bulma 使用的基础重置库。
/*! minireset.css v0.0.6 | MIT License | github.com/jgthms/minireset.css */
html,
body,
p,
ol,
ul,
li,
dl,
dt,
dd,
blockquote,
figure,
fieldset,
legend,
textarea,
pre,
iframe,
hr,
h1,
h2,
h3,
h4,
h5,
h6 {
margin: 0;
padding: 0;
}
h1,
h2,
h3,
h4,
h5,
h6 {
font-size: 100%;
font-weight: normal;
}
ul {
list-style: none;
}
button,
input,
select,
textarea {
margin: 0;
}
html {
box-sizing: border-box;
}
*, *::before, *::after {
box-sizing: inherit;
}
img,
video {
height: auto;
max-width: 100%;
}
iframe {
border: 0;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
td,
th {
padding: 0;
}
td:not([align]),
th:not([align]) {
text-align: left;
}
normalize.css
其实可以把 normalize.css 看成是“轻度的重置”，只不过它重置的方向是把浏览器中的元素按照标准的、一致性上的渲染上做努力的。
/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
/* Document
========================================================================== */
/**
* 1. Correct the line height in all browsers.
* 2. Prevent adjustments of font size after orientation changes in iOS.
*/
html {
line-height: 1.15; /* 1 */
-webkit-text-size-adjust: 100%; /* 2 */
}
/* Sections
========================================================================== */
/**
* Remove the margin in all browsers.
*/
body {
margin: 0;
}
/**
* Render the `main` element consistently in IE.
*/
main {
display: block;
}
/**
* Correct the font size and margin on `h1` elements within `section` and
* `article` contexts in Chrome, Firefox, and Safari.
*/
h1 {
font-size: 2em;
margin: 0.67em 0;
}
/* Grouping content
========================================================================== */
/**
* 1. Add the correct box sizing in Firefox.
* 2. Show the overflow in Edge and IE.
*/
hr {
box-sizing: content-box; /* 1 */
height: 0; /* 1 */
overflow: visible; /* 2 */
}
/**
* 1. Correct the inheritance and scaling of font size in all browsers.
* 2. Correct the odd `em` font sizing in all browsers.
*/
pre {
font-family: monospace, monospace; /* 1 */
font-size: 1em; /* 2 */
}
/* Text-level semantics
========================================================================== */
/**
* Remove the gray background on active links in IE 10.
*/
a {
background-color: transparent;
}
/**
* 1. Remove the bottom border in Chrome 57-
* 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
*/
abbr[title] {
border-bottom: none; /* 1 */
text-decoration: underline; /* 2 */
text-decoration: underline dotted; /* 2 */
}
/**
* Add the correct font weight in Chrome, Edge, and Safari.
*/
b,
strong {
font-weight: bolder;
}
/**
* 1. Correct the inheritance and scaling of font size in all browsers.
* 2. Correct the odd `em` font sizing in all browsers.
*/
code,
kbd,
samp {
font-family: monospace, monospace; /* 1 */
font-size: 1em; /* 2 */
}
/**
* Add the correct font size in all browsers.
*/
small {
font-size: 80%;
}
/**
* Prevent `sub` and `sup` elements from affecting the line height in
* all browsers.
*/
sub,
sup {
font-size: 75%;
line-height: 0;
position: relative;
vertical-align: baseline;
}
sub {
bottom: -0.25em;
}
sup {
top: -0.5em;
}
/* Embedded content
========================================================================== */
/**
* Remove the border on images inside links in IE 10.
*/
img {
border-style: none;
}
/* Forms
========================================================================== */
/**
* 1. Change the font styles in all browsers.
* 2. Remove the margin in Firefox and Safari.
*/
button,
input,
optgroup,
select,
textarea {
font-family: inherit; /* 1 */
font-size: 100%; /* 1 */
line-height: 1.15; /* 1 */
margin: 0; /* 2 */
}
/**
* Show the overflow in IE.
* 1. Show the overflow in Edge.
*/
button,
input { /* 1 */
overflow: visible;
}
/**
* Remove the inheritance of text transform in Edge, Firefox, and IE.
* 1. Remove the inheritance of text transform in Firefox.
*/
button,
select { /* 1 */
text-transform: none;
}
/**
* Correct the inability to style clickable types in iOS and Safari.
*/
button,
[type="button"],
[type="reset"],
[type="submit"] {
-webkit-appearance: button;
}
/**
* Remove the inner border and padding in Firefox.
*/
button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
border-style: none;
padding: 0;
}
/**
* Restore the focus styles unset by the previous rule.
*/
button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
outline: 1px dotted ButtonText;
}
/**
* Correct the padding in Firefox.
*/
fieldset {
padding: 0.35em 0.75em 0.625em;
}
/**
* 1. Correct the text wrapping in Edge and IE.
* 2. Correct the color inheritance from `fieldset` elements in IE.
* 3. Remove the padding so developers are not caught out when they zero out
* `fieldset` elements in all browsers.
*/
legend {
box-sizing: border-box; /* 1 */
color: inherit; /* 2 */
display: table; /* 1 */
max-width: 100%; /* 1 */
padding: 0; /* 3 */
white-space: normal; /* 1 */
}
/**
* Add the correct vertical alignment in Chrome, Firefox, and Opera.
*/
progress {
vertical-align: baseline;
}
/**
* Remove the default vertical scrollbar in IE 10+.
*/
textarea {
overflow: auto;
}
/**
* 1. Add the correct box sizing in IE 10.
* 2. Remove the padding in IE 10.
*/
[type="checkbox"],
[type="radio"] {
box-sizing: border-box; /* 1 */
padding: 0; /* 2 */
}
/**
* Correct the cursor style of increment and decrement buttons in Chrome.
*/
[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
height: auto;
}
/**
* 1. Correct the odd appearance in Chrome and Safari.
* 2. Correct the outline style in Safari.
*/
[type="search"] {
-webkit-appearance: textfield; /* 1 */
outline-offset: -2px; /* 2 */
}
/**
* Remove the inner padding in Chrome and Safari on macOS.
*/
[type="search"]::-webkit-search-decoration {
-webkit-appearance: none;
}
/**
* 1. Correct the inability to style clickable types in iOS and Safari.
* 2. Change font properties to `inherit` in Safari.
*/
::-webkit-file-upload-button {
-webkit-appearance: button; /* 1 */
font: inherit; /* 2 */
}
/* Interactive
========================================================================== */
/*
* Add the correct display in Edge, IE 10+, and Firefox.
*/
details {
display: block;
}
/*
* Add the correct display in all browsers.
*/
summary {
display: list-item;
}
/* Misc
========================================================================== */
/**
* Add the correct display in IE 10+.
*/
template {
display: none;
}
/**
* Add the correct display in IE 10.
*/
[hidden] {
display: none;
}
modern-normalize
是 normalize.css 的一个 Fork 版本，但只兼容最新的浏览器，所以删去了不少的样式，也更小。
正如项目发起人所说：该仓库目标就是为了让自己过时，当浏览器之间不再存在需要修复的样式一致性问题时，也就是这个项目死去之时，因为仓库文件没有需要写的代码了。
/*! modern-normalize v0.6.0 | MIT License | https://github.com/sindresorhus/modern-normalize */
/*
Document
========
*/
/**
Use a better box model (opinionated).
*/
*,
*::before,
*::after {
box-sizing: border-box;
}
/**
Use a more readable tab size (opinionated).
*/
:root {
-moz-tab-size: 4;
tab-size: 4;
}
/**
1. Correct the line height in all browsers.
2. Prevent adjustments of font size after orientation changes in iOS.
*/
html {
line-height: 1.15; /* 1 */
-webkit-text-size-adjust: 100%; /* 2 */
}
/*
Sections
========
*/
/**
Remove the margin in all browsers.
*/
body {
margin: 0;
}
/**
Improve consistency of default fonts in all browsers. (https://github.com/sindresorhus/modern-normalize/issues/3)
*/
body {
font-family:
system-ui,
-apple-system, /* Firefox supports this but not yet `system-ui` */
'Segoe UI',
Roboto,
Helvetica,
Arial,
sans-serif,
'Apple Color Emoji',
'Segoe UI Emoji';
}
/*
Grouping content
================
*/
/**
Add the correct height in Firefox.
*/
hr {
height: 0;
}
/*
Text-level semantics
====================
*/
/**
Add the correct text decoration in Chrome, Edge, and Safari.
*/
abbr[title] {
text-decoration: underline dotted;
}
/**
Add the correct font weight in Edge and Safari.
*/
b,
strong {
font-weight: bolder;
}
/**
1. Improve consistency of default fonts in all browsers. (https://github.com/sindresorhus/modern-normalize/issues/3)
2. Correct the odd 'em' font sizing in all browsers.
*/
code,
kbd,
samp,
pre {
font-family:
SFMono-Regular,
Consolas,
'Liberation Mono',
Menlo,
monospace; /* 1 */
font-size: 1em; /* 2 */
}
/**
Add the correct font size in all browsers.
*/
small {
font-size: 80%;
}
/**
Prevent 'sub' and 'sup' elements from affecting the line height in all browsers.
*/
sub,
sup {
font-size: 75%;
line-height: 0;
position: relative;
vertical-align: baseline;
}
sub {
bottom: -0.25em;
}
sup {
top: -0.5em;
}
/*
Forms
=====
*/
/**
1. Change the font styles in all browsers.
2. Remove the margin in Firefox and Safari.
*/
button,
input,
optgroup,
select,
textarea {
font-family: inherit; /* 1 */
font-size: 100%; /* 1 */
line-height: 1.15; /* 1 */
margin: 0; /* 2 */
}
/**
Remove the inheritance of text transform in Edge and Firefox.
1. Remove the inheritance of text transform in Firefox.
*/
button,
select { /* 1 */
text-transform: none;
}
/**
Correct the inability to style clickable types in iOS and Safari.
*/
button,
[type='button'],
[type='reset'],
[type='submit'] {
-webkit-appearance: button;
}
/**
Remove the inner border and padding in Firefox.
*/
button::-moz-focus-inner,
[type='button']::-moz-focus-inner,
[type='reset']::-moz-focus-inner,
[type='submit']::-moz-focus-inner {
border-style: none;
padding: 0;
}
/**
Restore the focus styles unset by the previous rule.
*/
button:-moz-focusring,
[type='button']:-moz-focusring,
[type='reset']:-moz-focusring,
[type='submit']:-moz-focusring {
outline: 1px dotted ButtonText;
}
/**
Correct the padding in Firefox.
*/
fieldset {
padding: 0.35em 0.75em 0.625em;
}
/**
Remove the padding so developers are not caught out when they zero out 'fieldset' elements in all browsers.
*/
legend {
padding: 0;
}
/**
Add the correct vertical alignment in Chrome and Firefox.
*/
progress {
vertical-align: baseline;
}
/**
Correct the cursor style of increment and decrement buttons in Safari.
*/
[type='number']::-webkit-inner-spin-button,
[type='number']::-webkit-outer-spin-button {
height: auto;
}
/**
1. Correct the odd appearance in Chrome and Safari.
2. Correct the outline style in Safari.
*/
[type='search'] {
-webkit-appearance: textfield; /* 1 */
outline-offset: -2px; /* 2 */
}
/**
Remove the inner padding in Chrome and Safari on macOS.
*/
[type='search']::-webkit-search-decoration {
-webkit-appearance: none;
}
/**
1. Correct the inability to style clickable types in iOS and Safari.
2. Change font properties to 'inherit' in Safari.
*/
::-webkit-file-upload-button {
-webkit-appearance: button; /* 1 */
font: inherit; /* 2 */
}
/*
Interactive
===========
*/
/*
Add the correct display in Chrome and Safari.
*/
summary {
display: list-item;
}
sanitize.css
也是 normalize.css 的一个 Fork 版本。但区别是：normalize.css 样式遵循 CSS 规范；sanitize.css 样式遵循开发人员共同的期望和偏好；而 reset.css 是为了取消所有元素的样式。sanitize.css 会和 normalize.css 保持同步的。
/* Document
* ========================================================================== */
/**
* Add border box sizing in all browsers (opinionated).
*/
*,
::before,
::after {
box-sizing: border-box;
}
/**
* 1. Add text decoration inheritance in all browsers (opinionated).
* 2. Add vertical alignment inheritance in all browsers (opinionated).
*/
::before,
::after {
text-decoration: inherit; /* 1 */
vertical-align: inherit; /* 2 */
}
/**
* 1. Use the default cursor in all browsers (opinionated).
* 2. Change the line height in all browsers (opinionated).
* 3. Use a 4-space tab width in all browsers (opinionated).
* 4. Remove the grey highlight on links in iOS (opinionated).
* 5. Prevent adjustments of font size after orientation changes in
* IE on Windows Phone and in iOS.
* 6. Breaks words to prevent overflow in all browsers (opinionated).
*/
html {
cursor: default; /* 1 */
line-height: 1.5; /* 2 */
-moz-tab-size: 4; /* 3 */
tab-size: 4; /* 3 */
-webkit-tap-highlight-color: transparent /* 4 */;
-ms-text-size-adjust: 100%; /* 5 */
-webkit-text-size-adjust: 100%; /* 5 */
word-break: break-word; /* 6 */
}
/* Sections
* ========================================================================== */
/**
* Remove the margin in all browsers (opinionated).
*/
body {
margin: 0;
}
/**
* Correct the font size and margin on `h1` elements within `section` and
* `article` contexts in Chrome, Edge, Firefox, and Safari.
*/
h1 {
font-size: 2em;
margin: 0.67em 0;
}
/* Grouping content
* ========================================================================== */
/**
* Remove the margin on nested lists in Chrome, Edge, IE, and Safari.
*/
dl dl,
dl ol,
dl ul,
ol dl,
ul dl {
margin: 0;
}
/**
* Remove the margin on nested lists in Edge 18- and IE.
*/
ol ol,
ol ul,
ul ol,
ul ul {
margin: 0;
}
/**
* 1. Add the correct sizing in Firefox.
* 2. Show the overflow in Edge 18- and IE.
*/
hr {
height: 0; /* 1 */
overflow: visible; /* 2 */
}
/**
* Add the correct display in IE.
*/
main {
display: block;
}
/**
* Remove the list style on navigation lists in all browsers (opinionated).
*/
nav ol,
nav ul {
list-style: none;
padding: 0;
}
/**
* 1. Correct the inheritance and scaling of font size in all browsers.
* 2. Correct the odd `em` font sizing in all browsers.
*/
pre {
font-family: monospace, monospace; /* 1 */
font-size: 1em; /* 2 */
}
/* Text-level semantics
* ========================================================================== */
/**
* Remove the gray background on active links in IE 10.
*/
a {
background-color: transparent;
}
/**
* Add the correct text decoration in Edge 18-, IE, and Safari.
*/
abbr[title] {
text-decoration: underline;
text-decoration: underline dotted;
}
/**
* Add the correct font weight in Chrome, Edge, and Safari.
*/
b,
strong {
font-weight: bolder;
}
/**
* 1. Correct the inheritance and scaling of font size in all browsers.
* 2. Correct the odd `em` font sizing in all browsers.
*/
code,
kbd,
samp {
font-family: monospace, monospace; /* 1 */
font-size: 1em; /* 2 */
}
/**
* Add the correct font size in all browsers.
*/
small {
font-size: 80%;
}
/* Embedded content
* ========================================================================== */
/*
* Change the alignment on media elements in all browsers (opinionated).
*/
audio,
canvas,
iframe,
img,
svg,
video {
vertical-align: middle;
}
/**
* Add the correct display in IE 9-.
*/
audio,
video {
display: inline-block;
}
/**
* Add the correct display in iOS 4-7.
*/
audio:not([controls]) {
display: none;
height: 0;
}
/**
* Remove the border on iframes in all browsers (opinionated).
*/
iframe {
border-style: none;
}
/**
* Remove the border on images within links in IE 10-.
*/
img {
border-style: none;
}
/**
* Change the fill color to match the text color in all browsers (opinionated).
*/
svg:not([fill]) {
fill: currentColor;
}
/**
* Hide the overflow in IE.
*/
svg:not(:root) {
overflow: hidden;
}
/* Tabular data
* ========================================================================== */
/**
* Collapse border spacing in all browsers (opinionated).
*/
table {
border-collapse: collapse;
}
/* Forms
* ========================================================================== */
/**
* Remove the margin on controls in Safari.
*/
button,
input,
select {
margin: 0;
}
/**
* 1. Show the overflow in IE.
* 2. Remove the inheritance of text transform in Edge 18-, Firefox, and IE.
*/
button {
overflow: visible; /* 1 */
text-transform: none; /* 2 */
}
/**
* Correct the inability to style buttons in iOS and Safari.
*/
button,
[type="button"],
[type="reset"],
[type="submit"] {
-webkit-appearance: button;
}
/**
* 1. Change the inconsistent appearance in all browsers (opinionated).
* 2. Correct the padding in Firefox.
*/
fieldset {
border: 1px solid #a0a0a0; /* 1 */
padding: 0.35em 0.75em 0.625em; /* 2 */
}
/**
* Show the overflow in Edge 18- and IE.
*/
input {
overflow: visible;
}
/**
* 1. Correct the text wrapping in Edge 18- and IE.
* 2. Correct the color inheritance from `fieldset` elements in IE.
*/
legend {
color: inherit; /* 2 */
display: table; /* 1 */
max-width: 100%; /* 1 */
white-space: normal; /* 1 */
}
/**
* 1. Add the correct display in Edge 18- and IE.
* 2. Add the correct vertical alignment in Chrome, Edge, and Firefox.
*/
progress {
display: inline-block; /* 1 */
vertical-align: baseline; /* 2 */
}
/**
* Remove the inheritance of text transform in Firefox.
*/
select {
text-transform: none;
}
/**
* 1. Remove the margin in Firefox and Safari.
* 2. Remove the default vertical scrollbar in IE.
* 3. Change the resize direction in all browsers (opinionated).
*/
textarea {
margin: 0; /* 1 */
overflow: auto; /* 2 */
resize: vertical; /* 3 */
}
/**
* Remove the padding in IE 10-.
*/
[type="checkbox"],
[type="radio"] {
padding: 0;
}
/**
* 1. Correct the odd appearance in Chrome, Edge, and Safari.
* 2. Correct the outline style in Safari.
*/
[type="search"] {
-webkit-appearance: textfield; /* 1 */
outline-offset: -2px; /* 2 */
}
/**
* Correct the cursor style of increment and decrement buttons in Safari.
*/
::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
height: auto;
}
/**
* Correct the text style of placeholders in Chrome, Edge, and Safari.
*/
::-webkit-input-placeholder {
color: inherit;
opacity: 0.54;
}
/**
* Remove the inner padding in Chrome, Edge, and Safari on macOS.
*/
::-webkit-search-decoration {
-webkit-appearance: none;
}
/**
* 1. Correct the inability to style upload buttons in iOS and Safari.
* 2. Change font properties to `inherit` in Safari.
*/
::-webkit-file-upload-button {
-webkit-appearance: button; /* 1 */
font: inherit; /* 2 */
}
/**
* Remove the inner border and padding of focus outlines in Firefox.
*/
::-moz-focus-inner {
border-style: none;
padding: 0;
}
/**
* Restore the focus outline styles unset by the previous rule in Firefox.
*/
:-moz-focusring {
outline: 1px dotted ButtonText;
}
/**
* Remove the additional :invalid styles in Firefox.
*/
:-moz-ui-invalid {
box-shadow: none;
}
/* Interactive
* ========================================================================== */
/*
* Add the correct display in Edge 18- and IE.
*/
details {
display: block;
}
/*
* Add the correct styles in Edge 18-, IE, and Safari.
*/
dialog {
background-color: white;
border: solid;
color: black;
display: block;
height: -moz-fit-content;
height: -webkit-fit-content;
height: fit-content;
left: 0;
margin: auto;
padding: 1em;
position: absolute;
right: 0;
width: -moz-fit-content;
width: -webkit-fit-content;
width: fit-content;
}
dialog:not([open]) {
display: none;
}
/*
* Add the correct display in all browsers.
*/
summary {
display: list-item;
}
/* Scripting
* ========================================================================== */
/**
* Add the correct display in IE 9-.
*/
canvas {
display: inline-block;
}
/**
* Add the correct display in IE.
*/
template {
display: none;
}
/* User interaction
* ========================================================================== */
/*
* 1. Remove the tapping delay in IE 10.
* 2. Remove the tapping delay on clickable elements
in all browsers (opinionated).
*/
a,
area,
button,
input,
label,
select,
summary,
textarea,
[tabindex] {
-ms-touch-action: manipulation; /* 1 */
touch-action: manipulation; /* 2 */
}
/**
* Add the correct display in IE 10-.
*/
[hidden] {
display: none;
}
/* Accessibility
* ========================================================================== */
/**
* Change the cursor on busy elements in all browsers (opinionated).
*/
[aria-busy="true"] {
cursor: progress;
}
/*
* Change the cursor on control elements in all browsers (opinionated).
*/
[aria-controls] {
cursor: pointer;
}
/*
* Change the cursor on disabled, not-editable, or otherwise
* inoperable elements in all browsers (opinionated).
*/
[aria-disabled="true"],
[disabled] {
cursor: not-allowed;
}
/*
* Change the display on visually hidden accessible elements
* in all browsers (opinionated).
*/
[aria-hidden="false"][hidden] {
display: initial;
}
[aria-hidden="false"][hidden]:not(:focus) {
clip: rect(0, 0, 0, 0);
position: absolute;
}
Bootstrap Reboot
Bootstrap 在 v4 版本引入了 Reboot 的概念。这也许从某方面表现了 CSS Normalize 和 CSS Reset 并非是两个相互冲突的概念，而是可以相互融合使用的。
Bootstrap Reboot 的作用是为框架内容的编写提供一个基准，在此之上在进行框架的构建将更加方便。
/*!
* Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
* Copyright 2011-2019 The Bootstrap Authors
* Copyright 2011-2019 Twitter, Inc.
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
*/
*,
*::before,
*::after {
box-sizing: border-box;
}
body {
margin: 0;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
font-size: 1rem;
font-weight: 400;
line-height: 1.5;
color: #212529;
background-color: #fff;
-webkit-text-size-adjust: 100%;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
[tabindex="-1"]:focus:not(:focus-visible) {
outline: 0 !important;
}
hr {
margin: 1rem 0;
color: inherit;
background-color: currentColor;
border: 0;
opacity: 0.25;
}
hr:not([size]) {
height: 1px;
}
h1, h2, h3, h4, h5, h6 {
margin-top: 0;
margin-bottom: 0.5rem;
font-weight: 500;
line-height: 1.2;
}
h1 {
font-size: 2.5rem;
}
h2 {
font-size: 2rem;
}
h3 {
font-size: 1.75rem;
}
h4 {
font-size: 1.5rem;
}
h5 {
font-size: 1.25rem;
}
h6 {
font-size: 1rem;
}
p {
margin-top: 0;
margin-bottom: 1rem;
}
abbr[title],
abbr[data-original-title] {
text-decoration: underline;
-webkit-text-decoration: underline dotted;
text-decoration: underline dotted;
cursor: help;
-webkit-text-decoration-skip-ink: none;
text-decoration-skip-ink: none;
}
address {
margin-bottom: 1rem;
font-style: normal;
line-height: inherit;
}
ol,
ul {
padding-left: 2rem;
}
ol,
ul,
dl {
margin-top: 0;
margin-bottom: 1rem;
}
ol ol,
ul ul,
ol ul,
ul ol {
margin-bottom: 0;
}
dt {
font-weight: 700;
}
dd {
margin-bottom: .5rem;
margin-left: 0;
}
blockquote {
margin: 0 0 1rem;
}
b,
strong {
font-weight: bolder;
}
small {
font-size: 0.875em;
}
sub,
sup {
position: relative;
font-size: 0.75em;
line-height: 0;
vertical-align: baseline;
}
sub {
bottom: -.25em;
}
sup {
top: -.5em;
}
a {
color: #0d6efd;
text-decoration: none;
}
a:hover {
color: #024dbc;
text-decoration: underline;
}
a:not([href]), a:not([href]):hover {
color: inherit;
text-decoration: none;
}
pre,
code,
kbd,
samp {
font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
font-size: 1em;
}
pre {
display: block;
margin-top: 0;
margin-bottom: 1rem;
overflow: auto;
font-size: 0.875em;
}
pre code {
font-size: inherit;
color: inherit;
word-break: normal;
}
code {
font-size: 0.875em;
color: #d63384;
word-wrap: break-word;
}
a > code {
color: inherit;
}
kbd {
padding: 0.2rem 0.4rem;
font-size: 0.875em;
color: #fff;
background-color: #212529;
border-radius: 0.2rem;
}
kbd kbd {
padding: 0;
font-size: 1em;
font-weight: 700;
}
figure {
margin: 0 0 1rem;
}
img {
vertical-align: middle;
}
svg {
overflow: hidden;
vertical-align: middle;
}
table {
border-collapse: collapse;
}
caption {
padding-top: 0.5rem;
padding-bottom: 0.5rem;
color: #6c757d;
text-align: left;
caption-side: bottom;
}
th {
text-align: inherit;
}
label {
display: inline-block;
margin-bottom: 0.5rem;
}
button {
border-radius: 0;
}
button:focus {
outline: 1px dotted;
outline: 5px auto -webkit-focus-ring-color;
}
input,
button,
select,
optgroup,
textarea {
margin: 0;
font-family: inherit;
font-size: inherit;
line-height: inherit;
}
button,
input {
overflow: visible;
}
button,
select {
text-transform: none;
}
select {
word-wrap: normal;
}
[list]::-webkit-calendar-picker-indicator {
display: none;
}
button,
[type="button"],
[type="reset"],
[type="submit"] {
-webkit-appearance: button;
}
button:not(:disabled),
[type="button"]:not(:disabled),
[type="reset"]:not(:disabled),
[type="submit"]:not(:disabled) {
cursor: pointer;
}
::-moz-focus-inner {
padding: 0;
border-style: none;
}
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="month"] {
-webkit-appearance: textfield;
}
textarea {
overflow: auto;
resize: vertical;
}
fieldset {
min-width: 0;
padding: 0;
margin: 0;
border: 0;
}
legend {
float: left;
width: 100%;
padding: 0;
margin-bottom: 0.5rem;
font-size: 1.5rem;
line-height: inherit;
color: inherit;
white-space: normal;
}
mark {
padding: 0.2em;
background-color: #fcf8e3;
}
progress {
vertical-align: baseline;
}
::-webkit-datetime-edit {
overflow: visible;
line-height: 0;
}
[type="search"] {
outline-offset: -2px;
-webkit-appearance: textfield;
}
::-webkit-search-decoration {
-webkit-appearance: none;
}
::-webkit-color-swatch-wrapper {
padding: 0;
}
::-webkit-file-upload-button {
font: inherit;
-webkit-appearance: button;
}
output {
display: inline-block;
}
summary {
display: list-item;
cursor: pointer;
}
template {
display: none;
}
main {
display: block;
}
[hidden] {
display: none !important;
}
/*# sourceMappingURL=bootstrap-reboot.css.map */
结语
我比较喜欢 Sarah Gebauer 说的这段话：
归根结底，这两个（CSS Reset 和 CSS Normalize）都不过是工具，如果你觉得自己对 normalize.css 更了解，并想要继续使用它，那就接着用。我过去曾经使用过 CSS Normalize（现在是 CSS Reset），如果我周围的人更喜欢使用 normalize.css，那么我也会再次使用它的。
到底该用哪个，首先取决于与你熟悉哪一个；另外，团队的选择，也会影响我们的决策。
值得注意的是，Bootstrap Reboot 的思想还是挺值得借鉴的。我们没有必要全部使用某一个方案大而全的代码，而是根据实际项目需要，使用其中的部分代码，再加上我们的自定义代码就行了。
（完）
