The Architecture of Open Source Applications (Volume 2) by Amy Brown & Greg Wilson (eds.)

Author:Amy Brown & Greg Wilson (eds.)
Language: eng
Format: epub

ResourceLoader

As in many web applications, MediaWiki's interface has become more interactive and responsive over the years, mostly through the use of JavaScript. Usability efforts initiated in 2008, as well as advanced media handling (e.g., online editing of video files), called for dedicated front-end performance improvements.

To optimize the delivery of JavaScript and CSS assets, the ResourceLoader module was developed to optimize delivery of JS and CSS. Started in 2009, it was completed in 2011 and has been a core feature of MediaWiki since version 1.17. ResourceLoader works by loading JS and CSS assets on demand, thus reducing loading and parsing time when features are unused, for example by older browsers. It also minifies the code, groups resources to save requests, and can embed images as data URIs. (For more on ResourceLoader, see the official documentation, and the talk Low Hanging Fruit vs. Micro-optimization: Creative Techniques for Loading Web Pages Faster given by Trevor Parscal and Roan Kattouw at OSCON 2011.)

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