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Basic syntax of jquery

无忌哥哥
无忌哥哥Original
2018-06-29 10:51:371895browse

Basic syntax: $(selector).Method()

Basic process:

1-Use the selector to find the DOM element and package it to generate a jQuery object

2 -Call the jQuery method to operate on the found element

Summary: Find the element and then operate

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>4.jquery的基本语法</title>
</head>
<body>
<script type="text/javascript" src="../js/jquery-3.3.1.js"></script>
<script type="text/javascript">
// 选择到<span>标签中的文本,将它的前景色设置为红色
$(&#39;h2 span&#39;).css(&#39;color&#39;,&#39;red&#39;)
//我们还可以修改一个元素的内容
$(&#39;p+p&#39;).html(&#39;终于找到你了,开工吧&#39;)
//补充知识: $()还可以创建一个新元素
$(&#39;<img src="../images/zly.jpg" width="150">&#39;)
//为什么看不到呢?因为你还没有把这个元素添加到当前页面中
//insertAfter(元素):插入到指定元素的后面
// $(&#39;<img src="../images/zly.jpg" width="150">&#39;).insertAfter(&#39;h2&#39;)
//我们还可以对新插入的元素进一步的处理:例如修剪成圆形
$(&#39;<img src="../images/zly.jpg" width="150">&#39;).insertAfter(&#39;h2&#39;).css(&#39;border-radius&#39;,&#39;50%&#39;)
</script>
</body>
</html>

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