CSS常用代码片段
隐藏滚动条或更改滚动条样式
/*css主要部分的样式*//*定义滚动条宽高及背景，宽高分别对应横竖滚动条的尺寸*/
::-webkit-scrollbar {
width: 10px; /*对垂直流动条有效*/
height: 10px; /*对水平流动条有效*/
}
/*定义滚动条的轨道颜色、内阴影及圆角*/
::-webkit-scrollbar-track{
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
background-color: rosybrown;
border-radius: 3px;
}
/*定义滑块颜色、内阴影及圆角*/
::-webkit-scrollbar-thumb{
border-radius: 7px;
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
background-color: #E8E8E8;
}
/*定义两端按钮的样式*/
::-webkit-scrollbar-button {
background-color:cyan;
}
/*定义右下角汇合处的样式*/
::-webkit-scrollbar-corner {
background:khaki;
}
检测横屏竖屏
第一种:
window.addEventListener("resize", () => {
if (window.orientation === 180 || window.orientation === 0) {
console.log('竖屏')
};
if (window.orientation === 90 || window.orientation === -90 ){
console.log('横屏')
}
}
第二种:
@media screen and (orientation: portrait) {
/*竖屏样式代码*/
}
@media screen and (orientation: landscape) {
/*横屏样式代码.*/
}
移动响应式设置
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover">
单位适配：
不考虑兼容性：
/* 基于UI width=750px DPR=2的页面 */
html {
font-size: calc(100vw / 7.5);
}
考虑兼容性：
/* 基于UI width=375px DPR=2的页面 */
!function(e, t) {
var n = t.documentElement,
d = e.devicePixelRatio || 1;
function i() {
var e = n.clientWidth / 3.75;
n.style.fontSize = e + "px"
}
if (function e() {
t.body ? t.body.style.fontSize = "16px" : t.addEventListener("DOMContentLoaded", e)
}(), i(), e.addEventListener("resize", i), e.addEventListener("pageshow", function(e) {
e.persisted && i()
}), 2 <= d) {
var o = t.createElement("body"),
a = t.createElement("div");
a.style.border = ".5px solid transparent", o.appendChild(a), n.appendChild(o), 1 === a.offsetHeight && n.classList.add("hairlines"), n.removeChild(o)
}
}(window, document)
/* 基于UI width=750px DPR=2的页面 */
function AutoResponse(width = 750) {
const target = document.documentElement;
if (target.clientWidth >= 600) {
target.style.fontSize = "80px";
} else {
target.style.fontSize = target.clientWidth / width * 100 + "px";
}
}
AutoResponse();
点击元素禁止产生背景或边框
-webkit-tap-highlight-color: rgba(0,0,0,0);
禁止长按链接与图片弹出菜单
-webkit-touch-callout: none;
禁止用户选中文字
-webkit-user-select:none;
user-select: none;
取消 input 输入时，英文首字母的默认大写
<input autocapitalize="off" autocorrect="off" />
视频全屏播放
<video x-webkit-airplay="true" webkit-playsinline="true" preload="auto" autoplay src=""></video>
开启硬件加速
transform: translate3d(0,0,0);
怎么让 Chrome 支持小于 12px 的文字？
-webkit-text-size-adjust:none;
文字超出隐藏并显示省略号
- 单行省略
.ell {
width:200rpx;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
- 多行省略
word-break: break-all;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
控制div内的元素自动换行
word-wrap: break-word;
word-break: break-all;
重置浏览器样式
/*! 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;
}
文字下沉效果
<p>恭喜你中了88元红包！</p>
<a href="javascript:" class="btn verticle-mode">领</a>
.btn {
display: inline-block;
color: #a78252;
background-color: #ddc390;
width: 85px; height: 85px;
line-height: 85px;
border: 6px solid #ddc390;
border-radius: 50%;
box-shadow: inset 0 0 0 1px #d6b681, 0 1px, 0 2px, 0 3px, 0 4px;
text-align: center;
-webkit-transition: border-color .25s, background-color .25s;
transition: border-color .25s, background-color .25s;
font-size: 42px;
cursor: pointer;
}
.btn:active {
text-indent: 2px;
}
.verticle-mode {
writing-mode: tb-rl;
-webkit-writing-mode: vertical-rl;
writing-mode: vertical-rl;
}
文字字符不被选中
article {
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
cursor: default;
}
使用系统字体
网页字体会跟随使用设备的系统默认字体改变
html { font: menu; }
body { font-size: 16px; }
设置input 的placeholder的字体样式
input::-webkit-input-placeholder { /* Chrome/Opera/Safari */
color: red;
}
input::-moz-placeholder { /* Firefox 19+ */
color: red;
}
input:-ms-input-placeholder { /* IE 10+ */
color: red;
}
input:-moz-placeholder { /* Firefox 18- */
color: red;
}
设置input聚焦时的样式
input:focus {
background-color: red;
}
取消input的边框
input{
border: none;
outline: none;
}
表格边框合并
table,tr,td{border: 1px solid #333;}
table{
border-collapse: collapse;
}
自定义滚动槽
::-webkit-scrollbar { /* 血槽宽度 */
width: 8px; height: 8px;
}
::-webkit-scrollbar-thumb { /* 拖动条 */
background-color: rgba(0,0,0,.3);
border-radius: 6px;
}
::-webkit-scrollbar-track { /* 背景槽 */
background-color: #ddd;
border-radius: 6px;
}
页面滚动条不发生晃动技巧
html {
overflow-y: scroll; /* for IE8 */
}
:root {
overflow-y: auto;
overflow-x: hidden;
}
:root body {
position: absolute;
}
body {
width: 100vw;
overflow: hidden;
}
占位图
<img>
img {
visibility: hidden;
}
img[src] {
visibility: visible;
}
img {
display: inline-block;
width: 200px;
height: 150px;
}
<img>
图片alt展示
img::after {
/* 生成alt信息 */
content: attr(alt);
/* 尺寸和定位 */
position: absolute;
bottom: 0;
width: 100%;
background-color: rgba(0,0,0,.5);
transform: translateY(100%);
/* 来点过渡动画效果 */
transition: transform .2s; }
img:hover::after {
/* alt信息显示 */
transform: translateY(0);
}
宽高定比图
.box {
padding: 10% 50%;
position: relative;
}
.box > img {
position: absolute;
width: 100%;
height: 100%;
left: 0;
top: 0;
}
