insert
UK[ɪnˈsɜ:t] US[ɪnˈsɜ:rt]
vt.Insert; embed; (in the article) add; insert
n. Insertion; addition (especially a small picture inserted or overprinted in a page of printed pictures); insert (of a book or newspaper); addition
before
英[bɪˈfɔ:(r)] 美[bɪˈfɔr,-ˈfor]
prep.Before...;before,better than;in front of...;with...
conj.Before...;before...;earlier than...;rather than...
adv.before, before; in front, in front
jquery insertBefore() method syntax
Function: insertBefore() method inserts HTML tags or existing elements before the selected element. If this method is used on existing elements, they will be moved from their current position and added before the selected element.
Syntax: $(content).insertBefore(selector)
Parameters:
| Parameter | Description |
| content | Required. Specifies the content to be inserted. Possible values: Selector expression HTML tag |
| selector | Required. Specifies where to insert the selected element. |
jquery insertBefore() method example
<html>
<head>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$("<span>你好！</span>").insertBefore("p");
});
});
</script>
</head>
<body>
<p>这是一个段落。</p>
<p>这是另一个段落。</p>
<button>在每个 p 元素之前插入 span 元素</button>
</body>
</html>Click the "Run instance" button to view the online instance