jQuery

jQuery

jQuery API (哪里不会点哪里)

jQuery 库 CDN加速

<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/core.js"></script>
</head>
<body>

</body>
</html>
选择器
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
<a href="" id="test-jquery">点击</a>

<script>
    //选择器就是 CSS 选择器
    $('#test-jquery').click(function () {
        alert('点击');
    })
</script>

</body>
</html>

公式：$(selector).action()

$('p').click();		//标签选择器
$('#id').click();		//Id选择器
$('.class').click();	//类选择器
鼠标事件

image-20200219134650477

//当网页加载完毕之后，响应事件
<script>
	$(function(){

});
</script>

操作DOM

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>

<ul id="test-ul">
    <li class="javascript">javascript</li>
    <li name="python">python</li>
</ul>

<script>
    $('#test-ul li[name = python]').text();
    $('#test-ul').html();
    console.log($('#test-ul li[name = python]').text());
    console.log($('#test-ul').html());
</script>

</body>
</html>
节点文本操作
 $('#test-ul li[name = python]').text();	//获得值
 $('#test-ul li[name = python]').text('设置值');	//设置值
 $('#test-ul').html();	//获得值
 $('#test-ul').html('<text>123</text>');	//设置值
结果

image-20200219140539200

元素的显示与隐藏
$('#test-ul li[name = python]').show()
$('#test-ul li[name = python]').hide()
posted @ 2020-02-19 14:25  PaulGeorge13  阅读(97)  评论(0)    收藏  举报