Is it possible to detect the browser zoom level when the user changed the zoom level of browser, and the default zoom level using javascript. I need to call different xml files according to the zoom level change.
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4-1: Don't repost the same question just because you don't like the original answer.zzzzBov– zzzzBov2010-11-09 05:04:49 +00:00Commented Nov 9, 2010 at 5:04
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1Especially when the original answer was perfectly valid.Christian Mann– Christian Mann2010-11-09 05:05:25 +00:00Commented Nov 9, 2010 at 5:05
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Does this answer your question? How to detect page zoom level in all modern browsers?gre_gor– gre_gor2023-06-02 15:20:37 +00:00Commented Jun 2, 2023 at 15:20
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2 Answers
I found that you have to vary for each browser:
This works great in safari and chrome:
zoom = parseInt(document.defaultView.getComputedStyle(document.documentElement, null).width,10)/document.documentElement.clientWidth
This works well in IE8+ (unless your user has some freakish screen....):
zoom = window.screen.deviceXDPI/96
And for Firefox and IE7 I use this although I still haven't got it to work with Firefox on the Mac...
Good luck.
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This will give the current zoom ratio relative to the initial zoom when the page was first loaded , if it was loaded with no zoom ( 100% ) then it will give you the real actual current zoom :
window.addEventListener('resize',()=>{
var height = Math.max( body.scrollHeight, body.offsetHeight,
html.clientHeight, html.scrollHeight, html.offsetHeight );
const ratio = ( height / document.documentElement.clientHeight )
if (!window.zc_)
{
window.zc_ = 100/ratio
}
const zoom = ratio* window.zc_
console.log(
zoom
);
})
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