Did you try this?
var input = document.getElementById('myInput');
or in case if your element has focus
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"CSS pixel" is different thing than "screen pixel". Did you set body width to 100%?
If you use transform 0.66, you manipulate with "CSS pixel width", so you should also set css properties of body/html: width:1920px;height:1080px to scale it to proper device dimensions.
Could you try this and then submit your app again?