How to work around this error script5007 unable to get property 'getDisplayMedia' of undefined or null reference on IE?

i'm doing a script to know if my browser supports the screen sharing. My Script works on every browser (Chrome, Opera, Firefox, Edge, Safari) except Internet Explorer and i don't know what is the problem.

Can you give me the answer please

var getDisplayMedia;
    // Screen sharing is supported by the browser 
    if (navigator.mediaDevices.getDisplayMedia || navigator.getDisplayMedia){
        getDisplayMedia = "O";
    }else {
        getDisplayMedia = "N";
    }
    console.log(getDisplayMedia);

On Chrome, Opera, Firefox, Edge, Safari it returns O or N. but on IE got this error : script5007 unable to get property 'getDisplayMedia' of undefined or null reference

You need to check that navigator.mediaDevices exists before checking one of its properties.

var getDisplayMedia;
// Screen sharing is supported by the browser 
if (navigator.mediaDevices && navigator.mediaDevices.getDisplayMedia || 
    navigator.getDisplayMedia
){
    getDisplayMedia = "O";
}else {
    getDisplayMedia = "N";
}

console.log(getDisplayMedia);