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Jquery $. trim () Remove string Spaces

Source: Internet
Author: User
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To delete string spaces in jquery, you can use $. trim () to remove string spaces. Next I will introduce you to anyone who needs to know about it.

It is easy to use JQuery to delete spaces before and after a string. use $. trim (StringText); // StringText is the string to delete spaces.

$. Trim (str)

Return Value: string;

Note: Remove spaces at the beginning and end of the string.

Example:

 
First look at an error code:

The Code is as follows: Copy code
<Input type = "text" name = "" id = "results" value = ""/>
Var content = $ ('# content'). val ();
If (content. trim () = '')
Alert ('null ');

No error is reported in firefox, but an error is reported in ie.

Therefore, you must write the following format:

The Code is as follows: Copy code

<Input type = "text" name = "" id = "results" value = ""/>

Var content = $ ('# results'). val ();
If ($. trim (content) = '')
Alert ('null ');

Or

Var content = $ ('# content'). val ();

If (jQuery. trim (content) = '')

Alert ('null ');

One instance

The Code is as follows: Copy code

<! Doctype html>
<Html>
<Head>
<Script src = "http://code.jquery.com/jquery-1.5.js"> </script>
</Head>
<Body>
<Button> show trim example </button>
<Script>

$ ("Button"). click (function (){
Var str = "lots of spaces before and after ";
Alert ("'" + str + "'");

Str = jquery. trim (str );
Alert ("'" + str + "'-no longer ");
});

</Script>

</Body>
</Html>

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Related Keywords:
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