Disable double-tap "zoom" option in browser on touch devices
I want to disable the double-tap zoom functionality on specified elements in the browser (on touch devices), without disabling all the zoom functionality.
For example: One element can be tapped multiple times for something to happen. This works fine on desktop browsers (as expected), but on touch device browsers, it will zoom in.
Note (as of 2020-08-04): this solution does not appear to work in iOS Safari v12+. I will update this answer and delete this note once I find a clear solution that covers iOS Safari.
CSS-only solution
Add touch-action: manipulation to any element on which you want to disable double tap zoom, like with the following disable-dbl-tap-zoom class:
.disable-dbl-tap-zoom {
touch-action: manipulation;
}
From the touch-action docs (emphasis mine):
manipulation
Enable panning and pinch zoom gestures, but disable additional non-standard gestures such as double-tap to zoom.
This value works on Android and on iOS.
<head>
<title>Site</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
etc...
</head>
I've used that very recently and it works fine on iPad. Haven't tested on Android or other devices (because the website will be displayed on iPad only).