chrome version number 48.0.2564.116
there is a problem with the custom template for the tree component using element-ui
html code is as follows:

<el-tree :data="data" node-key="id" @node-click="nodeClick">
    <span class="custom-tree-node" slot-scope="{data}">
        <img v-if="data.icon"  :src="data.icon">
        <span>{{data.name?data.name+"("+data.phone+")":data.phone}}</span>
        <span v-if="data.num">{{data.num}}</span>
    </span>
</el-tree>

part of the js code is as follows:

    data:{
        data:[{
            id:1,
            phone:"",
            children:[{
                id:2,
                phone:"10086",
                num:10,
                name:"10086"
            }],
            icon:"conn.png"
        }]
    }