How to dynamically modify the background color in vue.js

vue.js method to dynamically modify the background color: [methods: {chooseLabel(){document.getElementById("chooselabel").style.background="blue";},},].

The operating environment of this article: windows10 system, vue.js 2.9, thinkpad t480 computer.

Use js in vue to dynamically modify the background color:

The specific code is as follows:

<li  id="chooselabel" @click="chooseLabel" >js来动态改背景颜色</li>

    methods: {
      chooseLabel(){
      document.getElementById("chooselabel").style.background="blue";
      },
    },

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