v-bind:attr="msg"  :attr="msg"

attr={msg}

[attr]="msg"

v-on:click="handleChange($event)"    @click="handleChange"

//第一种方法

constructor(){

    this.handleChange=this.handleChange.bind(this); //改指向

}

onClick={this.handleChange}

//第二种方法

onClick={(ev)=>this.handleChange(ev)} //当使用箭头函数传参时，不需要改指向

(click)="hangleChange($event)"

<div ref="divElem">aaaaaaaa</div>

js:
console.log(this.$refs.divElem)

<div ref="divElem">aaaaaaaa</div>

js:
console.log(this.refs.divElem)

<div (click)="handleChange($event,divElem)" ref-divElem>aaaaaaaa</div>

js:
handleChange(ev,elem){
　　console.log(elem)
}