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March 9, 2020 22:52
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Challenge Catwalk | khanacademy
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Challenge: Catwalk</title> | |
| <style> | |
| #cat { | |
| position: absolute; | |
| left: 0px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div> | |
| <!-- Cat walking GIF from: http://www.anniemation.com/clip_art/graphics.html --> | |
| <img id="cat" src="https://www.kasandbox.org/programming-images/misc/cat-walk.gif"> | |
| </div> | |
| <script> | |
| var catEl = document.getElementById("cat"); | |
| var startTime = new Date().getTime(); | |
| var walkTheCat = function () { | |
| var currTime = new Date().getTime(); | |
| var secondsElapsed = ((currTime - startTime) / 1000); | |
| var newLeft = 30 * secondsElapsed; | |
| catEl.style.left = newLeft + "px"; | |
| window.requestAnimationFrame(walkTheCat); | |
| }; | |
| walkTheCat(); | |
| </script> | |
| </body> | |
| </html> |
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