The recommended method to give a text field focus and select its contents is the following:
However, this does not work in iOS. The correct way to do it is to use
setSelectionRange on an already focused input.
var input = document.getElementById('myInput'); input.focus(); input.setSelectionRange(0,99999);
setSelectionRange will not work on iOS if the element doesn’t have focus. Also be advised that anything revolving around giving text inputs focus is highly unreliable on mobile Safari.