Minify JS and CSS

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Minification refers to the process of removing unnecessary or redundant data without affecting how the resource is processed by the browser - e.g. code comments and formatting, removing unused code, using shorter variable and function names, and so on.

Unminified JavaScript and CSS wastes bandwidth and delays the rendering of a webpage.

How do I fix this ?

Use a build tool (npm, grunt or gulp) to automate the minification of your production javascript and css (but also keep the development files in human readable format). Alternatively, command-line and online minifiers also exist.

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