Tuesday, March 21, 2023
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Detect System Theme Choice Change Utilizing JavaScript

JavaScript and CSS enable customers to detect the consumer theme choice with CSS’ prefers-color-scheme media question. It is customary today to make use of that choice to indicate the darkish or mild theme on a given web site. However what if the consumer modifications their choice whereas utilizing your app?

To detect a system theme choice change utilizing JavaScript, you’ll want to mix matchMedia, prefers-color-scheme, and an occasion listener:

window.matchMedia('(prefers-color-scheme: darkish)')
      .addEventListener('change',({ matches }) => {
  if (matches) {
    console.log("change to darkish mode!")
  } else {
    console.log("change to mild mode!")

The change occasion of the matchMedia API notifies you when the system choice modifications. You should utilize this occasion to robotically replace the location’s show in actual time.

I like that this API permits detecting consumer choice on a system stage. Catering to consumer wants is a crucial a part of creating an incredible internet expertise!

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