What does this mean?

Users should be able to magnify the contents of a web page by up to 200%. In modern browsers this is almost always possible unless the page attempts to disable it.

Websites should avoid using the meta viewport tag to disable pinch-to-zoom. This behavior is highly discouraged for accessibility and usability on mobile devices.

Generally the code causing this issue looks like this:

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />

Here the use of user-scaleable=no asks the browser not to allow user zoom.

iOS no longer allows websites to disable pinch-to-zoom, and ignores this part of the viewport tag. Therefore to replicate this issue you must use an Android device.

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