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javascriptcross-browserviewport

How to get the browser viewport dimensions?

I want to provide my visitors the ability to see images in high quality, is there any way I can detect the window size?

Or better yet, the viewport size of the browser with JavaScript? See green area here:

Solution

  • Cross-browser @media (width) and @media (height) values 

    let vw = Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0)
let vh = Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0)

    window.innerWidth and window.innerHeight

    • gets CSS viewport @media (width) and @media (height) which include scrollbars
    • initial-scale and zoom variations may cause mobile values to wrongly scale down to what PPK calls the visual viewport and be smaller than the @media values
    • zoom may cause values to be 1px off due to native rounding
    • undefined in IE8-

    document.documentElement.clientWidth and .clientHeight

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