mounted() {
console.log( typeof (this.$el) );
console.log(this.$el.querySelector(".xxx"))
console.log( this.$el.ownerDocument )
if( this.$el.ownerDocument ){
let a = this.$el.ownerDocument.querySelector(".xxx")
console.log(a);
}else console.log(null)
},第二步就报错了
15:15:05.341 object at pages/setting/ble_search.vue:313
15:15:05.344 [Vue warn]: Error in mounted hook: "TypeError: this.$el.querySelector is not a function"
开始的$el有说是html元素，但输出是object
后面的 this.$el.ownerDocument 是有值的
this.$el.ownerDocument.querySelector还是会报不是一个函数
1 个回复
1***@qq.com
querySelector /querySelectorAll只是浏览器环境的api，也就是网页端才能用，小程序端和app端获取元素和节点需要用专有的方法，你去看下官网关于节点和element相关的文档吧。