效果
上代码
1 <style>
2 .s-bg2{ 3 backgound:#eee; 4 } 5 .s-c{ 6 color:bule; 7 } 8 </style>
9
10 // 根据主题色变换树的颜色
11 changeTreeAboutTheme(){ 12 let that = this; 13 that.$nextTick(function(){ 14 //先获取节点
15 let array = document.querySelectorAll('.is-current'); 16 if(array && array.length>0){ 17 for (let i = 0; i < array.length; i++) { 18 const element = array[i]; 19 //将原来的颜色置为无
20 const content = element.querySelectorAll('.el-tree-node__content'); 21 content[0].style.background = "none"; 22 // 加类，变更
23 if(element.className.indexOf('s-bg2') === -1){ 24 element.className += " s-bg2 s-c"; 25 } 26 } 27 } 28 }) 29 },
不懂私聊。