Element clientWidth and clientHeight is 0 in view onRender

[ahmafi]

Why clientWidth and clientHeight of the element is 0 on the view onRender method? If I read them with a setTimeout they are not 0 anymore and I get their valid values.

I have also set the width and height through model attributes and also in the style.

If I can't get these values in onRender where should I get them?

I'm trying to set the width and height of a canvas element.

...
model: {
  attributes: {
    width: '300px',
    height: '300px',
  }
}
view: {
  onRender({ el }) {
    console.log(el.clientWidth, el.clientHeight);
  }
}
...