Extending an existing jQuery function

Sure… Just save a reference to the existing function, and call it: (function($) { // maintain a reference to the existing function var oldcss = $.fn.css; // …before overwriting the jQuery extension point $.fn.css = function() { // original behavior – use function.apply to preserve context var ret = oldcss.apply(this, arguments); // stuff I will …

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Does LESS have an “extend” feature?

Yes, Less.js introduced extend in v1.4.0. :extend() Rather than implementing the at-rule (@extend) syntax used by SASS and Stylus, LESS implemented the pseudo-class syntax, which gives LESS’s implementation the flexibility to be applied either directly to a selector itself, or inside a statement. So both of these will work: .sidenav:extend(.nav) {…} or .sidenav { &:extend(.nav); …

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When to implement and extend? [closed]

Inheritance is useful to reduce the amount of code you rewrite. If you have several classes with a few common methods or fields, instead of defining these methods and fields over and over you can factor them into a base class and have each of the child classes extend that base class. Interfaces (and implements) …

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