Prevent iPhone from zooming form? [duplicate]

Answer 1

So here is the final fix which works well for me.

    @media screen and (-webkit-min-device-pixel-ratio:0) { 
      select,
      textarea,
      input {
        font-size: 16px !important;
      }
    }

Answer 2

UPDATE: This method no longer works on iOS 10.

---

It depend from the Viewport, you can disable it in this way:

<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0"/>

add user-scalable=0 and it should work on your inputs as well.

Answer 3

We ran into this issue at my work and found a similar answer to @alex. We can manipulate the viewport tag if it is an iOS device:

document.addEventListener('DOMContentLoaded', event => {
  if (/iPhone/.test(navigator.userAgent) && !window.MSStream) {
    const metaViewportTag = document.head.querySelector('meta[name="viewport"]')
    metaViewportTag.content = 'width=device-width, initial-scale=1, maximum-scale=1'
  }
})

This prevents zooming form controls on focus in iOS and still allows Android to work as normal.

Answer 4

Just found a simple fix if you're using Bootstrap:

As mentioned in w3s: You can quickly size labels and form controls within a Horizontal form by adding .form-group-lg to the element.

<form class="form-horizontal">
  <div class="form-group form-group-lg">
    <label class="control-label">Large Label</label>
    <div>
      <input class="form-control" type="text">
    </div>
  </div>

See second example on this page: http://www.w3schools.com/bootstrap/bootstrap_forms_sizing.asp

Tested it in Safari and Chrome on an iPhone SE and it works like a charm!

Answer 5

Use maximum-scale=1 instead of user-scalable=no to prevent the form zooming issue without breaking the user’s ability to pinch zoom.

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

Answer 6

The most up voted answer to set the font-size does not work for me. Using javascript to identify the client together with the meta tags in the answers here, we can prevent the zooming behavior of iPhone on input focus while otherwise keeping the zooming functionality intact.

$(document).ready(function ()
{
    if (/iPhone/.test(navigator.userAgent) && !window.MSStream)
    {
        $(document).on("focus", "input, textarea, select", function()
        {
            $('meta[name=viewport]').remove();
            $('head').append('<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0">');
        });

        $(document).on("blur", "input, textarea, select", function()
        {
            $('meta[name=viewport]').remove();
            $('head').append('<meta name="viewport" content="width=device-width, initial-scale=1">');
        });
    }
});

It seems like we have to replace the meta tag with new values on the blur-event, just to remove it does not seem to trigger an updated behavior.

Note that the UI is still initializing the zoom, but it quickly zooms back out again. I believe this is acceptable and iPhone users must already be accustomed to that the browser is having some dynamic zooming going on anyway in applicable scenarios.