Svelte - Create Image() object for canvas background from local image

Question

I would like to create a background image pattern for a canvas in my svelte application. I am using the following code to create the pattern but it creates a black canvas.

let image = new Image();
image.src = 'images/background.png'
ctx.fillStyle = ctx.createPattern(image, 'repeat'); 
ctx.fillRect(0, 0, canvas.width, canvas.height)

The image path is public/images/background.png

Answer 1

You probably have to wait for the image to load, otherwise there is nothing to draw to the canvas. Eg

const image = new Image();
image.src = 'images/background.png'
image.onload = () => {
    ctx.fillStyle = ctx.createPattern(image, 'repeat'); 
    ctx.fillRect(0, 0, canvas.width, canvas.height)
};

REPL example