Created
August 25, 2017 18:25
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JSX Web components
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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"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <title>webcomponents test</title> | |
| <style> | |
| body { | |
| margin: 0; | |
| height: 100vh; | |
| display: flex; | |
| align-items: center; | |
| justify-content: center; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <wc-clock></wc-clock> | |
| <script src="/index.js"></script> | |
| </body> | |
| </html> |
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| import h from "vhtml"; | |
| const times = n => Array(n).fill().map((x, i) => i); | |
| const getPointerPosition = date => ({ | |
| hours: `rotate(${(date.getHours() / 12 - 1) * 360} 200 200)`, | |
| minutes: `rotate(${date.getMinutes() / 60 * 360} 200 200)`, | |
| seconds: `rotate(${date.getSeconds() / 60 * 360} 200 200)` | |
| }); | |
| const Clock = ({ hours, minutes, seconds }) => | |
| <svg viewBox="-20 -20 440 440" height="400" width="400" fill="#777"> | |
| {times(60).map(i => | |
| <rect | |
| height={i % 5 === 0 ? 30 : 12} | |
| width={i % 5 === 0 ? 4 : 2} | |
| x={i % 5 === 0 ? 198 : 199} | |
| y="0" | |
| transform={`rotate(${6 * i} 200 200)`} | |
| /> | |
| )} | |
| <rect id="hours" height="160" width="6" x="197" y="60" transform={hours} /> | |
| <rect id="minutes" height="200" width="4" x="198" y="20" transform={minutes} /> | |
| <g id="seconds" transform={seconds} fill="tomato"> | |
| <rect height="200" width="2" x="199" y="20" /> | |
| <rect height="40" width="10" x="195" y="200" /> | |
| </g> | |
| <circle fill="none" stroke="#777" stroke-width="4" cx="200" cy="200" r="216" /> | |
| </svg>; | |
| class WCClock extends HTMLElement { | |
| constructor() { | |
| super(); | |
| this.shadow = this.attachShadow({ mode: "closed" }); | |
| } | |
| connectedCallback() { | |
| this.shadow.innerHTML = <Clock {...getPointerPosition(new Date())} />; | |
| this.hours = this.shadow.getElementById("hours"); | |
| this.minutes = this.shadow.getElementById("minutes"); | |
| this.seconds = this.shadow.getElementById("seconds"); | |
| this.interval = setInterval(() => this.update(), 1000); | |
| } | |
| disconnectedCallback() { | |
| clearInterval(this.interval); | |
| } | |
| update() { | |
| const { hours, minutes, seconds } = getPointerPosition(new Date()); | |
| this.hours.setAttribute("transform", hours); | |
| this.minutes.setAttribute("transform", minutes); | |
| this.seconds.setAttribute("transform", seconds); | |
| } | |
| } | |
| customElements.define("wc-clock", WCClock); |
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| { | |
| "devDependencies": { | |
| "bubleify": "^0.7.0", | |
| "budo": "^10.0.4", | |
| "rollupify": "^0.4.0" | |
| }, | |
| "dependencies": { | |
| "vhtml": "^2.1.0" | |
| }, | |
| "scripts": { | |
| "start": "budo index.js --live" | |
| }, | |
| "browserify": { | |
| "transform": [ | |
| [ | |
| "bubleify", | |
| { | |
| "jsx": "h", | |
| "transforms": { | |
| "classes": false | |
| } | |
| } | |
| ], | |
| "rollupify" | |
| ] | |
| } | |
| } |
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