Created
January 2, 2022 00:57
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Repro property set before custom element upgrade
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| customElements.define('hello-world', class extends HTMLElement { | |
| constructor() { | |
| super() | |
| this.innerHTML = '<div>Hello world!</div>' | |
| } | |
| set mode (mode) { | |
| this.querySelector('div') | |
| .setAttribute('style', mode === 'light' | |
| ? 'background: white; color: black;' | |
| : 'background: black; color: white;' | |
| ) | |
| } | |
| }) |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Repro property set before custom element upgrade</title> | |
| </head> | |
| <body> | |
| <h1>Repro property set before custom element upgrade</h1> | |
| <hello-world></hello-world> | |
| <script src="./hello.js" type="module"></script> | |
| <script> | |
| document.querySelector('hello-world').mode = 'dark' | |
| </script> | |
| </body> | |
| </html> |
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