Does CSS media query "@media only screen" only work when I am resizing the window?

I recently encountered an issue with the code found on this website (the repository can be viewed on Github here):

@media only screen and (max-width: 600px) {
 img {width: 100%; 
  height: 100%; 
  margin: 0; 
  padding: 0;
 } 
 a.box {
  width: 100%;
  padding:14px 15px;
  font-size: 0.75em;
 }
}

Despite setting the maximum screen width to 600px, I noticed that it doesn't trigger properly on my iPhone 7 Plus:

https://i.sstatic.net/z3KBU.jpg

Even when using Firefox's Responsive Design mode for iPhone 7/8/9 Plus, the issue persists:

https://i.sstatic.net/BCFpS.png

Strangely enough, resizing the Firefox window by just one pixel seems to resolve the problem:

However, when adjusting my browser window to match the size of an iPhone 6/7/8 exactly, the code works fine. This suggests that the issue might be related to the iPhone user-agent-string. Any thoughts on how to address this?

https://i.sstatic.net/BZm66.png

Any insights on what could be causing this and how to fix it would be greatly appreciated.

cssfirefox

Answer №1

To ensure proper viewport zooming, make sure to include the following meta tag in the head section of your HTML document:

<meta content="width=device-width, initial-scale=1" name="viewport">

Without this meta tag, the page will be initially rendered at a higher screen width and then scaled down to fit the device width, causing issues with media queries not being triggered as expected.

For more information on viewport meta tag, please visit this link.

Answer №2

Include

<meta name="viewport" content="width=device-width, initial-scale=1">

inside the <head> section of your website and it is advisable to use the standard max-width:768px instead of 600px for media-query

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