What could be causing jQuery to overlook dynamically loaded jQuery Mobile buttons?

While working with a web page that uses jQuery Mobile, I utilized Ajax to load the following HTML content. The key detail is the presence of the onButton class attached to the anchor tag.

<a class="onButton ui-btn ui-btn-inline ui-btn-corner-all ui-shadow ui-btn-up-c" href="#" data-role="button" data-inline="true" data-theme="c"><span class="ui-btn-inner ui-btn-corner-all"><span class="ui-btn-text">Turn On</span></span></a>

Upon loading via Ajax, I triggered a "create event" in order to implement jQuery Mobile button styles as described in the documentation.

$.ajax({
    url: '/loadAllButtons',
    context: $('contentBox'),
    cache: false,
    data: {'listOfEntities': JSON.stringify([1,2,3,4,5])},
    success: function(data) {
        $(this).html(data).trigger( "create" );
    }
});

Although the buttons loaded successfully, when I tried to check for the presence of anchor tags with the onButton class using

console.log($('.onButton').length);
, the console showed 0.

An intriguing observation considering Chrome Web Developer indicates 5 instances of <a> tags with the onButton class that were loaded via Ajax.

Why is it that jQuery is not able to detect these newly loaded anchor tags (or buttons)?


To clarify my debugging process, here is what I am doing:

$.ajax({
    url: '/loadAllButtons',
    context: $('contentBox'),
    cache: false,
    data: {'listOfEntities': JSON.stringify([1,2,3,4,5])},
    success: function(data) {
        $(this).html(data).trigger( "create" );
    }
});
console.log($('.onButton').length);

Thank you.

Answer №1

In order to effectively debug your code, it is crucial that you place your console.log() inside the callback function for the AJAX call. Currently, the console.log() is executing immediately after the request is made, before the response is received from the server and before any elements are added to the DOM due to the asynchronous nature of AJAX requests.

Here is a recommended approach:

$.ajax({
    url: '/loadAllButtons',
    context: $('contentBox'),
    cache: false,
    data: {'listOfEntities': JSON.stringify([1,2,3,4,5])},
    success: function(data) {
        $(this).html(data).trigger( "create" );
        console.log($('.onButton').length);
    }
});

Furthermore, when adding button elements to the DOM that already have jQuery Mobile classes/structure applied, consider using .button('refresh') instead of .trigger('create') to refresh the elements rather than initializing them again. To do this, you can potentially utilize

.find('.onButton').button( "refresh" )
like so:

$(this).html(data).find('.onButton').button( "refresh" );

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