Make Html Canvas Fit Screen

I would like to make it so that the HTML Canvas element has a width = to the browser window width, and height = the browser window height. Below is the code I use. HTML:

Solution 1:

Try this for your CSS:

body {
  margin: 0;
}

#gameCanvas {
  width: 100vw;
  height: 100vh;
}

Solution 2:

Try this:

html, body {
    height: 100%;
}

#gameCanvas {
    width: 100%;
    height: 100%;
}

The 100% has to filter down from the html element or else it won't fill the height of the screen.

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