Created
January 2, 2020 08:32
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Web component experiment
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title></title> | |
| </head> | |
| <body> | |
| <x-one> | |
| <p>Lorem ipsum</p> | |
| Dolor sit amet | |
| </x-one> | |
| <br> | |
| <button is="x-button">Haha</button> | |
| <script src="./main.js"></script> | |
| <script src="./x-one.js"></script> | |
| <script src="./x-button.js"></script> | |
| </body> | |
| </html> |
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| (() => { | |
| if ('customElements' in window) { | |
| customElements.whenDefined('x-one').then(() => { | |
| console.log('x-one defined'); | |
| }); | |
| } | |
| })(); |
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| (() => { | |
| const template = document.createElement('template'); | |
| template.innerHTML = ` | |
| <style></style> | |
| <strong> | |
| <slot></slot> | |
| </strong> | |
| `; | |
| class El extends HTMLElement { | |
| static get observedAttributes() { | |
| return ['color']; | |
| } | |
| get color() { return this.getAttribute('color'); } | |
| set color(val) { this.setAttribute('color', val); } | |
| constructor() { | |
| super(); | |
| const shadowRoot = this.attachShadow({ mode: 'open' }); | |
| shadowRoot.appendChild(template.content.cloneNode(true)); | |
| this.addEventListener('click', e => { | |
| console.log(e); | |
| }); | |
| } | |
| connectedCallback() { | |
| console.log('x-one connected'); | |
| } | |
| disconnectedCallback() {} | |
| attributeChangedCallback(attrName, oldVal, newVal) { | |
| console.log(attrName, oldVal, newVal); | |
| } | |
| } | |
| if ('customElements' in window) { | |
| customElements.define('x-one', El); | |
| } | |
| })(); |
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