Example of before () method usage in jQuery, jquerybefore
This article describes the before () method usage in jQuery. Share it with you for your reference. The specific analysis is as follows:
This method can append HTML content to the front of the external part of each matching element.
Note:
This method appends the content, that is, the original content is still in progress.
HTML content can contain HTML tags and be rendered by browsers.
The text content first converts the pre-defined HTML characters in the content into html character entities, so that HTML tags will not be rendered.
Syntax structure:
Copy codeThe Code is as follows: $ (selector). before (content)
Instance code:
Instance 1:
Copy codeThe Code is as follows:
<! DOCTYPE html>
<Html>
<Head>
<Meta charset = "UTF-8">
<Meta name = "author" content = "http://www.bkjia.com/"/>
<Title> helping customers </title>
<Style type = "text/css">
Div
{
Height: 150px;
Width: 150px;
Background-color: green;
Margin-top: 10px;
}
</Style>
<Script type = "text/javascript" src = "mytest/jQuery/jquery-1.8.3.js"> </script>
<Script type = "text/javascript">
$ (Document). ready (function (){
$ ("Div"). before ("<B> learn </B> ");
})
</Script>
</Head>
<Body>
<Div> </div>
</Body>
</Html>
Append content to the front of the original div content.
Example 2:
Copy codeThe Code is as follows:
<! DOCTYPE html>
<Html>
<Head>
<Meta charset = "UTF-8">
<Meta name = "author" content = "http://www.bkjia.com/"/>
<Title> helping customers </title>
<Style type = "text/css">
Div
{
Height: 150px;
Width: 150px;
Background-color: green;
Margin-top: 10px;
}
</Style>
<Script type = "text/javascript" src = "mytest/jQuery/jquery-1.8.3.js"> </script>
<Script type = "text/javascript">
$ (Document). ready (function (){
$ ("Button"). click (function (){
$ (". Html"). before ("<B> learn </B> ");
$ (". Text"). text ("<B> learn </B> ");
})
})
</Script>
</Head>
<Body>
<Div class = "html"> </div>
<Div class = "text"> </div>
<Button> click to view results </button>
</Body>
</Html>
Through this example, you can observe the differences between HTML content and text content.
I hope this article will help you with jQuery programming.