JavaScript中事件捕获(Event capturing)-------------->由外向内，事件冒泡(Event bubblin)---------->由内向外 

1 addEventListener("click", function() {}, useCapture:false);

 

<!DOCTYPE html>
<html lang="en">
<head>

</head>
<body>
    <div id="content" class="c1">
        <a id="b">hhaha</a>
        <a href="#!/fdaf">fda</a>
        <a href="#!/fdaaa">fdf</a>
    </div>
    <script>
        document.getElementById("b").addEventListener("click", function() {
            //this.href = this.href.replace("?", "#");
            console.log("inner");
        },true);
        
        window.addEventListener("hashchange", function() {
            console.log(location.hash);
        }, false);
        
        document.getElementById("content").addEventListener("click", function() {
            console.log("outer");
        },true);
    </script>
</body>
</html>

 

-------------->outer

-------------->inner

 

默认是不用捕获的。---------->由内向外

------------->inner

------------->outer

 

 

区别于xmlhttp.send("GET", url, async:true);--------->表示是否异步async

posted @ 2014-09-20 15:18  daishuguang  阅读(374)  评论(0)  编辑  收藏  举报