<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>element-ui</title>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
<div id="app">
<el-tree ref="tree" :data="data" :props="defaultProps" default-expand-all :expand-on-click-node="false"
node-key="id" highlight-current @node-click="handleNodeClick"></el-tree>
</div>
<script>
new Vue({
el: "#app",
data: {
data: [{
id: '1',
label: '一級 1',
children: [{
id: '1-1',
label: '二級 1-1',
children: [{
id: '1-1-1',
label: '三級 1-1-1'
}]
}]
}, {
id: '2',
label: '一級 2',
children: [{
id: '2-1',
label: '二級 2-1',
children: [{
id: '2-1-1',
label: '三級 2-1-1'
}]
}, {
id: '2-2',
label: '二級 2-2',
children: [{
id: '2-2-1',
label: '三級 2-2-1'
}]
}]
}, {
id: '3',
label: '一級 3',
children: [{
id: '3-1',
label: '二級 3-1',
children: [{
id: '3-1-1',
label: '三級 3-1-1'
}]
}, {
id: '3-2',
label: '二級 3-2',
children: [{
id: '3-2-1',
label: '三級 3-2-1'
}]
}]
}],
defaultProps: {
children: 'children',
label: 'label'
}
},
methods: {
handleNodeClick(data) {
console.log(data);
}
},
mounted() {
this.$nextTick(function () {
this.$refs['tree'].setCurrentKey('1');
})
}
})
</script>
</body>
</html>
