Question

I want to extend a particular aspect of jQuery UI: https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.js

Search in the source code for easeInElastic to see the following snippet:

easeInElastic: function (x, t, b, c, d) {
    var s=1.70158;var p=0;var a=c; alert('');
    if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*9.3;
    if (a < Math.abs(c)) { a=c; var s=p/4; }
    else var s = p/(2*Math.PI) * Math.asin (c/a);
    return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
},

I need to slightly modify the code, but I don’t want to duplicate the whole library.
How can I include a modified snippet in a separate .js file so that it will overwrite the original?

Edit:

Out of all the suggested methods, this is the only one that worked:

$.extend($.easing,
{
    easeInElastic: function (x, t, b, c, d) {
           alert('');
        var s=1.70158;var p=0;var a=c;
        if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
        if (a < Math.abs(c)) { a=c; var s=p/4; }
        else var s = p/(2*Math.PI) * Math.asin (c/a);
        return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
    }

});

Answer 1

$.fn.easeInElastic = function(x,t,b,c,d){...}

Or use $.extend();