Question

I created a jquery function, but $.isFunction seems to always return false if the function name is inside a string.

(function( $ ) {
    $.myTest = function() {
       return true;
    }
})( jQuery );

alert($.isFunction('$.myTest'));

Fiddle : here.

Note : if I remove quotes (eg. alert($.isFunction($.myTest));, it works, but my function is inside a string.

EDIT

This function name is inside a string because I create a plugin to make ajax from parameters inside the dom elements. For example :

        data-route="xxx.php"
        data-lock=".buttonsToLock"
        data-output="#outputContainer"
        data-callback-after="$.myTest"

But I am unable to check if data-callback-after is an existing function.

Any idea?

Thanks

Answer 1

Looks like you trying to dynamically call functions / callbacks.

You should consider the following approach.

    (function( $ ) {
        window.myTest = function() {
           return true;
        }
    })( jQuery );

var data-route="xxx.php",
    data-lock=".buttonsToLock",
    data-output="#outputContainer",
    data-callback-after="myTest";

    // To run the function 
    window[data-callback-after]();

    // To test the function
    $.isFunction(window[data-callback-after]);