test_media_queries_with_zoom.html (1137B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>Media Queries with Zoom</title> 5 <script src="/tests/SimpleTest/SimpleTest.js"></script> 6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"> 7 </head> 8 9 <body> 10 11 <div>Testing media queries with different zoom levels</div> 12 13 <script type="application/javascript"> 14 15 const originalDPR = window.devicePixelRatio; 16 const originalZoom = SpecialPowers.getFullZoom(window); 17 18 const zoomsToTest = [ 19 300, 20 240, 21 200, 22 170, 23 150, 24 133, 25 120, 26 110, 27 100, 28 90, 29 80, 30 67, 31 50, 32 30, 33 ]; 34 35 for (let i = 0; i < zoomsToTest.length; ++i) { 36 let zoomPercent = zoomsToTest[i]; 37 38 let relativeZoom = originalZoom * zoomPercent / 100; 39 SpecialPowers.setFullZoom(window, relativeZoom); 40 let actualZoom = SpecialPowers.getDeviceFullZoom(window); 41 let targetDPR = (originalDPR * actualZoom); 42 let actualDPR = window.devicePixelRatio; 43 let mql = window.matchMedia(`(resolution: ${targetDPR}dppx)`); 44 ok(mql.matches, `At ${zoomPercent}% zoom, target ${targetDPR}dppx matches ${actualDPR}dppx.`); 45 } 46 47 // Reset the zoom when the test is done. 48 SpecialPowers.setFullZoom(window, originalZoom); 49 </script> 50 51 </body> 52 </html>