js一屏显示--动态分配每个区域的高度

在mouted中去获取页面的高度（clientHeight）然后给每个区域动态分配值

对于页面一屏显示这个问题
你首先看看自己用的电脑的分辨率用js动态获取
然后看看ui图是否是跟你的获取电脑的分辨率尺寸一致

如果一致的，你就可以按照UI图来，
如果不是，你就要微调上下间距
对应一屏展示不可能所有的分辨率都是一屏展示的，
所以你要选择某些主流的屏一屏显示就可以了其他不好兼容的就让它产生滚动条。

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <!-- 引入样式 -->
        <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
        <!-- 引入组件库 -->
        <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.min.js"></script>
        <!-- 引入Vue -->
        <script src="https://unpkg.com/element-ui/lib/index.js"></script>
        <style>
        html,body{
            height: 100%;
            width: 100%;
            margin: 0;
        }
            
   .el-row {
    padding: 0;
    &:last-child {
      margin-bottom: 0;
    }
  }
  .el-col {
    border-radius: 4px;
  }

  .grid-content {
    border-radius: 4px;
  }

  .aa,.bb,.cc,.dd{
    
  }
  .aa{
      background: #0099FF;
  }
   .bb{
        background: #FFC0CB;
  }
   .cc{
        background: darkmagenta;
  }
   .dd{
        background: sienna;
  }
  
  #app{
      height: 100%;
  }

        </style>
    </head>
    <body>

        <div id="app">
            
            <el-row class="aa" id="fullheight1">
                <el-col :span="24">
                    <div class="grid-content bg-purple-dark">11111</div>
                </el-col>
            </el-row>
            
            <el-row class="bb" id="fullheight2">
                <el-col :span="12">
                    <div class="grid-content bg-purple">2222222</div>
                </el-col>
                <el-col :span="12">
                    <div class="grid-content bg-purple-light">333333</div>
                </el-col>
            </el-row>
            
            <el-row class="cc" id="fullheight3">
                <el-col :span="8">
                    <div class="grid-content bg-purple">444444</div>
                </el-col>
                <el-col :span="8">
                    <div class="grid-content bg-purple-light">333333</div>
                </el-col>
                <el-col :span="8">
                    <div class="grid-content bg-purple">333333</div>
                </el-col>
            </el-row>
            
            <el-row class="dd" id="fullheight4">
                <el-col :span="6">
                    <div class="grid-content bg-purple">33333</div>
                </el-col>
                <el-col :span="6">
                    <div class="grid-content bg-purple-light">33333</div>
                </el-col>
                <el-col :span="6">
                    <div class="grid-content bg-purple">33333</div>
                </el-col>
                <el-col :span="6">
                    <div class="grid-content bg-purple-light">33333</div>
                </el-col>
            </el-row>

        </div>

    </body>

    <script>
        new Vue({
            el: '#app',
            data() {
                return {
                    pingheight:""
                };
            },
          
            mounted(){
              this.pingheight=document.documentElement.clientHeight;//获取屏幕的高度
              document.getElementById("fullheight1").style.height=Math.floor(this.pingheight/4)+"px";
              document.getElementById("fullheight2").style.height=Math.floor(this.pingheight/4)+"px";
              document.getElementById("fullheight3").style.height=Math.floor(this.pingheight/4)+"px";
              document.getElementById("fullheight4").style.height=Math.floor(this.pingheight/4)+"px";
            },
  
        })
    </script>