Creating a perfectly centered square canvas on your screen

In the game I'm developing, I need to position a canvas at the center of the screen. The canvas should have equal width and height, covering the entire screen without overflowing, essentially creating a square shape.

Is there a way to achieve this using only CSS?

Answer №1

To achieve the desired result, one can utilize CSS @media along with aspect-ratio.

#canvas {
  width: 100vw;
  height: 100vw;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}
@media (min-aspect-ratio: 1/1) {
  #canvas {
    width: 100vh;
    height: 100vh;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
  }
}

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