I am struggling with an issue related to the scripts in the <head> section of my website:
<script src="scripts/jquery-1.11.0.min.js" type="text/javascript"></script>
<script>
$('#submit').click(function() {
$('#submit').css('background-image', 'url("/static/ui/msback.png")');
});
</script>
Despite having a submit button with the id of submit, when I click on it, the background image does not change.
What could be causing this error?
To ensure that jQuery assigns the function to the button after the element is loaded, it is necessary to wrap your function within .ready(). Without this, jQuery will be unable to assign the function as the button does not yet exist.
Here's an example:
$(document).ready(function () {
$('#submit').click(function() {
$(this).css('background-image', 'url("/static/ui/msback.png")');
});
});
JS FIDDLE: http://jsfiddle.net/pQgAj/1/
For more detailed information, you can also refer to http://api.jquery.com/ready/.
In addition: utilizing $(this) within the .click() function can save time since jQuery doesn't need to evaluate $('#submit') again.
//Alternative: Another option to wrapping your function in .ready() is placing your javascript code at the end of your site. However, this method is not recommended.
It's a good idea to enclose it in document.ready:
<script src="scripts/jquery-1.11.0.min.js" type="text/javascript"></script>
<script>
$(document).ready(function(){
$('#submit').click(function() {
$('#submit').css('background-image', 'url("/static/ui/msback.png")');
});
});
</script>
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