Created
October 31, 2020 06:48
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component.html
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🧱</text></svg>"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Super Simple Web Component Example</title> | |
| </head> | |
| <body> | |
| <script> | |
| class halfstacknametag extends HTMLElement { | |
| constructor () { | |
| super(); | |
| } | |
| static get observedAttributes() { | |
| return ['text','colour']; | |
| } | |
| get text() {return this.hasAttribute('text');} | |
| get colour() {return this.hasAttribute('colour');} | |
| attributeChangedCallback() { | |
| if(this.shadowRoot){ | |
| let tag = this.shadowRoot.querySelector('div'); | |
| let name = this.shadowRoot.querySelector('h2'); | |
| name.innerHTML = this.text ? this.getAttribute('text') : ''; | |
| if (this.colour) { | |
| tag.style.background = this.getAttribute('colour'); | |
| } | |
| } | |
| } | |
| connectedCallback () { | |
| let shadowRoot = this.attachShadow({mode: 'open'}); | |
| shadowRoot.innerHTML = ` | |
| <style> | |
| div { | |
| border-radius: 10px; | |
| font-family: impact; | |
| background: ${this.getAttribute('colour')||'firebrick'}; | |
| padding: 5px; | |
| margin: 10px 0; | |
| max-width: 40vw; | |
| } | |
| h1 {color: #fff;padding:5px 10px;} | |
| h2 {border-radius: 10px;color: #000;background:#fff;margin:5px 10px;padding:10px} | |
| </style> | |
| <div> | |
| <h1>Halfstack</h1> | |
| <h2>${this.getAttribute('text')}</h2> | |
| </div> | |
| `; | |
| } | |
| } | |
| window.customElements.define('halfstack-nametag', halfstacknametag); | |
| let nametag = document.createElement('halfstack-nametag'); | |
| document.body.appendChild(nametag); | |
| nametag.setAttribute('text', "Chris"); | |
| nametag.setAttribute('colour' ,"blue"); | |
| </script> | |
| <halfstack-nametag text="Dylan" colour="green"></halfstack-nametag> | |
| <halfstack-nametag text="Chris"></halfstack-nametag> | |
| </body> | |
| </html> |
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