Expert guide to making your JavaScript responsive

When we think of responsive web design development, the first thing that comes to mind is how we can use media queries to change the look and feel of our site depending on rules defined by the query. Media queries are conditional, with CSS being applied if the browser is meeting the condition. A visual change to a site may also require a change to how the site functions. This is where we start using JavaScript.

There are many examples of where we may want to change functionality; for example, where on desktop we want to show content in a modal window. This provides a good, usable experience on desktop. However, on mobile devices modal windows often look cramped and provide a poor user experience. The best option is to disable the modal functionality on mobile. It's here that CSS can fall short, and where JavaScript can be used to pick up the work.

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