Css

BEM

1. B: 块 u-form
2. E: 元素 u-form__input
3. M: 修饰 u-form--success

Sass

mixin

// flex
@mixin flex($alignItem: center, $justifyContent: flex-start, $direction: row) {
	display: flex;
	align-items: $alignItem;
	justify-content: $justifyContent;
	flex-direction: $direction;
}

// 文本省略
@mixin ellipsis($num) {
	@if $num >1 {
		overflow: hidden;
		text-overflow: ellipsis;
		display: -webkit-box;
		-webkit-box-orient: vertical;
		-webkit-line-clamp: $num;
	}

	@else if $num ==1 {
		overflow: hidden;
		white-space: nowrap !important;
		text-overflow: ellipsis;
	}
}

// icon 样式
@mixin icon-style($size: 20px, $margin: unset) {
	width: $size !important;
	height: $size !important;
	margin: $margin !important;
}

// 绝对定位居中
@mixin absolute-center {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}

// 禁止文字换行
@mixin text-nowrap {
	text-wrap: nowrap;
	white-space: nowrap;
	word-break: keep-all;
}

@mixin scroll-bar {

	// 滚动条凹槽的颜色，还可以设置边框属性
	&::-webkit-scrollbar-track-piece {
		background-color: #f8f8f8;
	}

	// 滚动条的宽度
	&::-webkit-scrollbar {
		width: 9px;
		height: 9px;
	}

	// 滚动条的设置
	&::-webkit-scrollbar-thumb {
		background-color: #dddddd;
		background-clip: padding-box;
		min-height: 28px;
	}

	&::-webkit-scrollbar-thumb:hover {
		background-color: #bbb;
	}
}

reset

body,
ul,
ol,
li,
p,
h1,
h2,
h3,
h4,
h5,
h6,
form,
fieldset,
table,
td,
img,
pre,
div {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

ul,
ol {
	list-style-type: none;
}

select,
input,
img,
select {
	vertical-align: middle;
}

/*p span 自动换行*/
p,
span {
	word-break: break-all;
}

body {
	font-size: 14px !important;
	height: 100vh;
	font-family: 'PingFangSC-Regular', 'Microsoft YaHei', 'Helvetica', 'sans-serif';
	overflow: auto;
}

a {
	text-decoration: none;
}

Less

mixin

.flex(@justify: center; @align: center; @direction: row; @wrap: nowrap) {
	display: flex;
	flex-direction: @direction;
	justify-content: @justify;
	align-items: @align;
	flex-wrap: @wrap;
}

.ellipsis(@lines: 1) {
	overflow: hidden;
	text-overflow: ellipsis;
	display: -webkit-box;
	-webkit-line-clamp: @lines;
	-webkit-box-orient: vertical;
}

常用片段

文字左右对齐

.test {
	width: 70px;
	text-align-last: justify;
}

文字无法选中

.test {
	-webkit-user-select: none;
	-moz-user-select: none;
	user-select: none;
	-ms-user-select: none;
}

清除图片间距

.img {
	display: block;
}

点击穿透与禁用样式

.test {
	pointer-events: none;
}

模糊滤镜

.test {
	backdrop-filter: blur(3px);
}

使用本地字体

字体过大使用在线字体工具压缩一下 网址

@font-face {
	font-family: 'MyFont';
	src:
		url('@/assets/fonts/MyFont-Regular.woff2') format('woff2'),
		url('@/assets/fonts/MyFont-Regular.woff') format('woff');
	font-weight: 400;
	font-style: normal;
	font-display: swap; /* 优化加载体验 */
}

/*使用*/
.title {
	font-family: 'MyFont', serif;
}

移动端img标签禁用拖动/缩放/滚动/选中

背景：微信浏览器img标签长按保存图片，会造成img进行拖动、放大，操作体验不好

img {
	width: 100%;
	height: 100%;
	user-select: none; /* 禁止选中 */
	-webkit-user-drag: none; /* 禁止拖动图片 */
	touch-action: manipulation; /* 阻止双指缩放/滚动 */
	display: block;
}

禁止文字换行

text-wrap: nowrap;
white-space: nowrap;
word-break: keep-all;

背景图片

.banner {
	background-image: url('@/assets/images/survey/bg.png');
	background-size: 100% auto; /* 宽度100%，高度自适应 */
	background-repeat: no-repeat;
	background-position: top center; /* 顶部居中 */
}

渐变背景

background: linear-gradient(180deg, #98c1ef 0%, #bfd3ff 23%, rgba(169, 187, 241, 0.2) 100%);

内边框

box-shadow: inset 0 0 0 1px #7472fa;