Answers for "javascript get width and height of screen"

js window dimensions

// better than using window.innerWidth / window.innerHeight 
// because of scrollbars
const client = {
      width: document.documentElement.clientWidth,
      height: document.documentElement.clientHeight
}

get screen width javascript

window.screen.width
//or just
screen.width

js know size of screen displayed

var win = window,
    doc = document,
    docElem = doc.documentElement,
    body = doc.getElementsByTagName('body')[0],
    x = win.innerWidth || docElem.clientWidth || body.clientWidth,
    y = win.innerHeight|| docElem.clientHeight|| body.clientHeight;
alert(x + ' × ' + y);

Get width of screen

public innerWidth: any;
ngOnInit() {
    this.innerWidth = window.innerWidth;
}