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UX Tip #70 JS/CSS optimisation – concatenation by categories

An optimised technical solution increases performance and enhances User Experience. One way of concatenating your JS/CSS to optimise their load times is to categories your assets. You can split your combined JavaScript (or CSS) files up even further by categorising the contents of the file by its contribution to the page. For example, load all of the assets that render content above-the-fold prior to other assets.