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July 9, 2020 20:00
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Document</title> | |
| <script | |
| src="https://code.jquery.com/jquery-3.5.0.min.js" | |
| integrity="sha256-xNzN2a4ltkB44Mc/Jz3pT4iU1cmeR0FkXs4pru/JxaQ=" | |
| crossorigin="anonymous" | |
| ></script> | |
| </head> | |
| <body> | |
| <h1 class="title">Wait for element demo</h1> | |
| <button class="button">Click Me!</button> | |
| </body> | |
| <script> | |
| const handleClick = () => { | |
| const title = document.querySelector(".title"); | |
| title.classList.add("foo"); | |
| }; | |
| const button = document.querySelector(".button"); | |
| button.onclick = handleClick; | |
| const waitForEl = (selector, callback, attempts = 20) => { | |
| if ($(selector).length) { | |
| callback(); | |
| } else { | |
| if (attempts > 0) { | |
| attempts--; | |
| setTimeout(function () { | |
| waitForEl(selector, callback, attempts); | |
| }, 1000); | |
| } | |
| } | |
| console.log(`Unable to find selector: ${selector}`); | |
| }; | |
| waitForEl(".foo", () => { | |
| console.log("It worked"); | |
| }); | |
| </script> | |
| </html> |
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The second version is giving me a "Uncaught SyntaxError: await is only valid in async function" error in the console...