通用后台管理系统前端界面Ⅲ——使用CSS预处理器

1、使用scss     scss官网

        下载包

npm i sass-loader@7 node-sass@4 -S

         使用（scss可以嵌套使用    scss 和 sass）

<template>
  <div class="hello">
    <p>这里是主页，请参考使用</p>
    <el-button @click="visible = true">Button</el-button>
    <el-dialog :visible.sync="visible" title="Hello world">
      <p>Try Element</p>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name:'home',
  setup() {},
};
</script>
<style lang="scss">
.hello{
  background-color: aquamarine;
  .el-button{
    color:red;
  }
}
</style>

        效果： 

2、使用less

         下载包

npm i less@3 less-loader@7 -S

         使用

直接把的scss改为less，两者语法通用的

3、样式重置        官网

把代码复制下来放在项目中新建的reset.css文件：

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

在App.vue的style中进行引入使用

@import url('./assets/css/reset.css');

样式充值之前：

重置之后：会更紧凑，看起来更舒服。