Attachment 338891 Details for Bug 185034 – Small test case

Small test case

zoom_test.html (text/html), 597 bytes, created by Juan Pablo Ugarte on 2018-04-26 10:51:53 PDT

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Creator: Juan Pablo Ugarte

Created: 2018-04-26 10:51:53 PDT

Size: 597 bytes

patch

obsolete

<html>
  <h1>getBoundingClientRect() x and y are multiplied by 1/zoom</h1>
  <canvas id="test"></canvas>
<script type="text/javascript">

function printBoundingClientRect (e) {
  let rect = e.getBoundingClientRect();
  console.log(`${e.id}: Position: ${rect.left}x${rect.top}, size: ${rect.width}x${rect.height}, scrollY=${window.scrollY}`);
}
  
window.onload = function () {
  let canvas = window.document.getElementById('test');

  printBoundingClientRect (canvas);
  
  canvas.style.background = 'red';
  canvas.style.zoom = 0.5;
  
  printBoundingClientRect (canvas);
};
  
</script>
</html>

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