VIP26/day14/js/7.事件源.js

// 事件源 事件的源头
var box1 = document.getElementById("box1");
var box2 = document.getElementById("box2");

box1.onclick = function(event){
    console.log(event.target,'box1');
}

box2.onclick = function(event){
    console.log(event.target,'box2');
    event.stopPropagation();
}