File chooser dialog can only be shown with a user activation.

使用vue开发时，通过ref通过“this.refs.[name].$el.click()”触发按钮时提示“File chooser dialog can only be shown with a user activation.”，按钮不能触发，网上解决办法是“dispatchEvent(new MouseEvent('click'))”代替“$el.click()”，在我所在的场景不生效，所以就在要出发按钮组件上加了一个id，按钮可以正常触发了

<template>
    <el-button ref="btn" id="btn" >测试</el-button>
</template>


<script>
export default{

    methods:{
        clickBtn(){
        this.$refs.btn.$el.click()
    }
</script>