Question

46

jQuery compare string to input value

rated 0 times [ 50] [ 4] / answers: 1 / hits: 18326 / 7 Years ago, fri, august 4, 2017, 12:00:00

I am trying to do a string comparison like so in JQuery

$('#select_directory_type').on('change', function() {

     window.alert($(this).val()); // I can see the selection is SOMETHING

     if( SOMETHING === $(this).val() ){

         // Never gets executed even when the selection is SOMETHING.

     } });

Another question is, what is the difference between

$this.val()

and 

$(this).val()

Thanks!

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kevonmoisesf

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3 Years ago

answered 7 Years ago jimmieo · Accepted Answer

In reverse order $(this).val() says, give jquery (represented by a $) the value this, and then call the function .val() on the return of that function. $this.val() is saying, call the function .val() on the variable $this, which i suspect you haven't defined.

It looks like your snippet of code should work, but === checks for exact string equality, I'd highly suggest you inspect your string in console using console.log, to verify it doesn't have any trailing whitespaces or similar. Replace your alert with console.log(), and look in the developer console (ctrl-shift-I on chrome). you could also

 console.log( SOMETHING === $(this).val())

to see if your issue is actually the comparison. Its most likely whitespace related though.