Adjusting CSS styling based on screen orientation changes when resizing a browser window on a

I'm uncertain about the functionality on desktop screens when it comes to resizing the browser window. My understanding is that changing the orientation should occur naturally when the height surpasses the width and vice versa after resizing.

However, I am puzzled as to why the provided code only takes effect upon page load.

@media all and (orientation: portrait) {
  .slider-slide {
    background-size: auto 100% !important;
  }
}
@media all and (orientation: landscape) {
  .slider-slide {
    background-size: 100% auto !important;
  }
}

The goal of this code snippet is to adjust the size of a background image based on the orientation. Although both orientations work fine when the page loads at the proper resolution, they fail to respond dynamically when the window is resized. Any thoughts or suggestions?

Answer №1

In my opinion, the most effective solution for detecting changes in orientation on desktop browsers is proposed by Fabrizio Calderan. However, if you specifically need to identify shifts between portrait and landscape modes, the original answer to the question confirms that this method will suffice.

To see a practical demonstration, visit http://example.com/css-media-query-demo.

One notable variation I noticed is that Robert opted for using screen instead of all. Therefore:

@media screen and (orientation: portrait) {
  ...
}

It's worth mentioning that browser compatibility may vary. Personally, I tested Robert's solution on Chrome and Firefox with success. The performance on other browsers remains uncertain. (by the way, there must be a more reliable alternative to caniuse.com!)

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