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June 13, 2019 12:44
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Image decoding
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| <html> | |
| <body> | |
| <div class="jank-detector"> | |
| Random numbers, to highlight jank: | |
| <span class="rand"></span> | |
| </div> | |
| <script> | |
| const rand = document.querySelector(".rand"); | |
| function randFrame() { | |
| rand.textContent = Math.random(); | |
| requestAnimationFrame(randFrame); | |
| } | |
| randFrame(); | |
| </script> | |
| <script> | |
| function onload1() { | |
| setTimeout(() => { | |
| const img = new Image(); | |
| img.width = 1400; | |
| img.decoding = "async"; | |
| img.src = `https://res.cloudinary.com/demo/image/upload/f_auto,w_6400/q_1/string_1.jpg?${Date.now()}`; | |
| img.onload = () => { | |
| const orig = document.getElementById("orig"); | |
| orig.parentElement.replaceChild(img, orig); | |
| }; | |
| }, 3000); | |
| } | |
| </script> | |
| <div id="sdf"></div> | |
| <img | |
| id="orig" | |
| width="1400" | |
| onload="onload1()" | |
| src="https://res.cloudinary.com/demo/image/upload/e_blur:1000,w_6400/q_1/string_1.jpg" | |
| /> | |
| <br /> | |
| </body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <body> | |
| <div class="jank-detector"> | |
| Random numbers, to highlight jank: | |
| <span class="rand"></span> | |
| </div> | |
| <script> | |
| const rand = document.querySelector(".rand"); | |
| function randFrame() { | |
| rand.textContent = Math.random(); | |
| requestAnimationFrame(randFrame); | |
| } | |
| randFrame(); | |
| </script> | |
| <script> | |
| function onload1() { | |
| setTimeout(() => { | |
| console.log("start"); | |
| const img = new Image(); | |
| img.width = 1400; | |
| img.decoding = "sync"; | |
| img.src = `https://res.cloudinary.com/demo/image/upload/f_auto,w_6400/q_1/string_1.jpg?${Date.now()}`; | |
| img.onload = () => { | |
| const orig = document.getElementById("orig"); | |
| orig.parentElement.replaceChild(img, orig); | |
| }; | |
| } | |
| </script> | |
| <div id="sdf"></div> | |
| <img | |
| id="orig" | |
| width="1400" | |
| onload="onload1()" | |
| src="https://res.cloudinary.com/demo/image/upload/e_blur:1000,w_6400/q_1/string_1.jpg" | |
| /> | |
| <br /> | |
| </body> | |
| </html> |
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