HTML5 Canvas fit parent div

[passiomatic]

I think you can do that in two ways:

• Use elm/browser's Browser.Dom - browser 1.0.2 at init and ask the canvas parent its dimensions. You probably want scene widths and heights here.
• Measure canvas parent dimensions with JS at startup time via element.getBoundingClientRect() (see Element.getBoundingClientRect() - Web APIs | MDN) and pass such values to Elm via flags.

You might want to keep track of window resize too (and potentially resize of the canvas parent) so you have to install a subscription for the resize event too in your Elm app.