How do you disable viewport zooming on Mobile Safari?

I've tried all three of these to no avail:

<meta name=”viewport” content=”width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;” />

<meta name=”viewport” content=”width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=false;” />

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

each are different values I found recommended by google searching or SO searching, but none of the 'user-scalable=X' values seem to be working

I also tried comma delimiting the values instead of semicolon, no luck. Then I tried ONLY having the user-scalable value present, still no luck.

UPDATE

Got this from Apple's site and it works:

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

it turns out that the problem was the non-standard quotes because I had copied the meta tag from a website that was using them, whoops

Solution 1:

Your code is displaying attribute double quotes as fancy double quotes. If the fancy quotes are present in your actual source code I would guess that is the problem.

This works for me on Mobile Safari in iOS 4.2.

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

Solution 2:

For the people looking for an iOS 10 solution, user-scaleable=no is disabled in Safari for iOS 10. The reason is that Apple is trying to improve accessibility by allowing people to zoom on web pages.

From release notes:

To improve accessibility on websites in Safari, users can now pinch-to-zoom even when a website sets user-scalable=no in the viewport.

So as far as I understand, we are sh** out of luck.

Solution 3:

@mattis is correct that iOS 10 Safari won't allow you to disable pinch to zoom with the user-scalable attribute. However, I got it to disable using preventDefault on the 'gesturestart' event. I've only verified this on Safari in iOS 10.0.2.

document.addEventListener('gesturestart', function (e) {
    e.preventDefault();
});