How to Prevent Fixed Elements from Jumping in Mobile Safari with Virtual Keyboards?

Buggy Fixed Elements in Mobile Safari with Virtual Keyboard

Dealing with fixed elements in Mobile Safari can be a challenge, especially when a virtual keyboard is opened. A common issue arises when a fixed navigation element jumps unexpectedly when an input field within the navigation gains focus.

Cause and Solution

This behavior is likely due to a known issue in Mobile Safari. The proposed solution involves dynamically changing the positioning of fixed elements.

• When an input element gains focus and the virtual keyboard appears, switch the position property of the fixed elements to absolute.
• Restore the original fixed positioning once the input element loses focus and the keyboard is hidden.

Code Snippet

The following code snippet demonstrates this solution:

.header { 
    position: fixed; 
} 
.footer { 
    position: fixed; 
} 
.fixfixed .header, 
.fixfixed .footer { 
    position: absolute; 
} 

if ('ontouchstart' in window) {
    /* cache dom references */ 
    var $body = $('body'); 

    /* bind events */
    $(document)
    .on('focus', 'input', function() {
        $body.addClass('fixfixed');
    })
    .on('blur', 'input', function() {
        $body.removeClass('fixfixed');
    });
}

By adding this code, the navigation element will remain fixed at the bottom of the page even when the user interacts with the input field and the virtual keyboard appears.

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