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JQuery cannot use click event to solve the problem

黄舟
黄舟Original
2017-06-27 10:25:291576browse

Why can’t we use click event in JQuery


<html>
<head>
<title>测试JQuery</title>
<meta charset = "utf-8"/>
<style>
.class_1{
background-color: red;
}
</style>
<script type = "text/javascript" src = "../JQuery/jquery.js"></script>
<script language = "javascript">
$(document).ready(function(){
window.alert("Hello JQuery!");
});
//这里触发事件后不能输出您好
$(&#39;#test&#39;).click(function(){
window.alert(&#39;您好&#39;);
});
</script>
</head>
<body>
<input class = "class_1" type = "button" id="test" value = "点击测试"/>
</body>
</html>

Yours can use click event


$(document).ready(function(){
window.alert("Hello JQuery!");
//把代码放在 ready 方法里面 才起作用  因为要等文档加载完成 才能找到 test这个元素
//这里触发事件后不能输出您好
$(&#39;#test&#39;).click(function(){
window.alert(&#39;您好&#39;);
});
});

But I changed it Even if you are like this, you won’t show it? ? ? 

<html>
    <head>
        <title>测试JQuery</title>
        <meta charset = "utf-8"/>
        <style>
            .class_1{
                background-color: red;
            }
        </style>
        <script type = "text/javascript" src = "../JQuery/jquery.js"></script>
         
    </head>
    <body>
        <input class = "class_1" type = "button" id="test" value = "点击测试"/>
        <script language = "javascript">
            $(document).ready(function(){
                alert("Hello JQuery!");
            });
            //这里触发事件后不能输出您好
            $(&#39;#test&#39;).click(function(){
                alert(&#39;您好&#39;);
            });
        </script>
    </body>
</html>

Loading order problem.

###Is the jquery.js path correct? The window here in window.alert can be omitted. ###

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