Created
November 19, 2024 16:38
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Save cferdinandi/55c72dc28881b2e8a566d6ee8587af7f to your computer and use it in GitHub Desktop.
YouTube tutorial: https://youtu.be/vlmtVmWimD4
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Basic Setup</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <style type="text/css"> | |
| body { | |
| margin: 1em auto; | |
| max-width: 40em; | |
| width: 88%; | |
| } | |
| button { | |
| background-color: rebeccapurple; | |
| border: 0; | |
| border-radius: 0.25em; | |
| color: #fff; | |
| padding: 0.5em 1em; | |
| } | |
| [role="status"] { | |
| display: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <count-up></count-up> | |
| <script> | |
| customElements.define('count-up', class extends HTMLElement { | |
| /** | |
| * The class constructor object | |
| */ | |
| constructor () { | |
| // Always call super first in constructor | |
| super(); | |
| // Create a shadow root | |
| this.root = this.attachShadow({mode: 'closed'}); | |
| // Set attributes | |
| this.count = 0; | |
| // Create the button | |
| this.btn = document.createElement('button'); | |
| this.btn.textContent = 'Count up!'; | |
| // Create the announcement text | |
| this.announce = document.createElement('div'); | |
| this.announce.setAttribute('role', 'status'); | |
| this.announce.textContent = `Clicked ${this.count} times`; | |
| // Append HTML into the DOM | |
| this.append(this.btn); | |
| this.root.innerHTML = '<slot></slot>'; | |
| this.root.append(this.announce); | |
| // Event listener | |
| this.btn.addEventListener('click', this); | |
| } | |
| handleEvent () { | |
| this.count++; | |
| this.announce.textContent = `Clicked ${this.count} times`; | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
This file contains 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
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Basic Setup</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <style type="text/css"> | |
| body { | |
| margin: 1em auto; | |
| max-width: 40em; | |
| width: 88%; | |
| } | |
| button { | |
| background-color: rebeccapurple; | |
| border: 0; | |
| border-radius: 0.25em; | |
| color: #fff; | |
| padding: 0.5em 1em; | |
| } | |
| [role="status"] { | |
| display: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <count-up></count-up> | |
| <script> | |
| customElements.define('count-up', class extends HTMLElement { | |
| /** | |
| * The class constructor object | |
| */ | |
| constructor () { | |
| // Always call super first in constructor | |
| super(); | |
| // Set attributes | |
| this.count = 0; | |
| // Create the button | |
| this.btn = document.createElement('button'); | |
| this.btn.textContent = 'Count up!'; | |
| // Create the announcement text | |
| this.announce = document.createElement('div'); | |
| this.announce.setAttribute('role', 'status'); | |
| this.announce.textContent = `Clicked ${this.count} times`; | |
| // Append HTML into the DOM | |
| this.append(this.btn); | |
| this.append(this.announce); | |
| // Event listener | |
| this.btn.addEventListener('click', this); | |
| } | |
| handleEvent () { | |
| this.count++; | |
| this.announce.textContent = `Clicked ${this.count} times`; | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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