How to make your web apps perform better

As each year passes, developers tread further into the brave new world of JavaScript-heavy web sites and applications. Using code libraries like jQuery and frameworks such as Backbone.js or Ember.js, together with a Swiss Army knife of reusable plug-ins, it's possible to simplify the core aspects of JS development in order to free us up to build richer user experiences that are both functional and a joy to use.

Each JavaScript file we add to a project introduces an extra level of complexity, notably in terms of how we manage that file's relationship with the rest of the JS files in the codebase. We may write some code in one file to interact with a page using a jQuery plug-in from a separate file, which in turn relies on jQuery being present and loaded from another file.

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