Draw in the another window canvas

draw.js

function getCanvas() {
    const newWindow = window.open('');
    const link = newWindow.document.createElement('link');
    link.rel = 'stylesheet';
    link.href = 'https://fonts.googleapis.com/css?family=Poor+Story';
    link.onload = function () {
        const newCanvas = newWindow.document.createElement('canvas');
        const newContext = newCanvas.getContext('2d');
        newWindow.document.body.appendChild(newCanvas);
    
        newContext.font = '50px Poor Story';
        newContext.fillText('Hello, world', 50, 50);
    }
    newWindow.document.body.appendChild(link);
}

getCanvas();