Introduction to the use of jquery $.trim() method_jquery

$.trim(str)

Returns: string;

Description: Remove leading and trailing spaces from the string.

Example:

Look at the error code first. Error code:

Copy code The code is as follows :

var content = $('#content') .val();
if(content.trim() == '')
alert('empty');

The above writing method will not report an error under firefox, but It will indeed report an error

under IE, so it should be written in the following format:

Copy the code The code is as follows:

var content = $('#results').val() ;
if($.trim(content) == '')
alert('empty');

or

Copy code The code is as follows:

var content = $('#content').val();
if(jQuery.trim(content ) == '')
alert('empty');