input放入焦点，选中全部文本

async mounted(){
   let inputList = document.querySelectorAll('input');
   for (let index = 0; index < inputList.length; index++) {
     inputList[index].onfocus = this.selectValue;//input放入焦点，全选文本
   }
}	

//全选文本
selectValue(e) {
	e.currentTarget.select();
}