vue v-if的使用

代码部分

 <el-row>
            <el-col :span="20">
                <template v-for="(node,i) of hierarchies" v-if="a==2">//判断
                    <div class="tag" @click="locateNode(node)">{{node.name}}</div>
                    <span v-if="i < hierarchies.length - 1">&nbsp;&nbsp;&gt;&nbsp;&nbsp;</span>
                </template>
                <template v-for="(node,i) of arr" v-if="a==1">//判断
                    <div class="tag" @click="locateNode(node)">{{node.name}}</div>
                    <span v-if="i < arr.length - 1">&nbsp;&nbsp;&gt;&nbsp;&nbsp;</span>
                </template>
            </el-col>
        </el-row>

总结

==标识判断，=是赋值，所以要控制显示隐藏的话，用==