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August 15, 2023 09:06
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wrap chartjs to web component
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Chart.js Web Component</title> | |
| <script src="https://cdn.jsdelivr.net/npm/chart.js"></script> | |
| </head> | |
| <body> | |
| <chart-js> | |
| { | |
| "type": "bar", | |
| "data": { | |
| "labels": ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"], | |
| "datasets": [{ | |
| "label": "# of Votes", | |
| "data": [12, 19, 3, 5, 2, 3], | |
| "backgroundColor": ["red", "blue", "yellow", "green", "purple", "orange"] | |
| }] | |
| }, | |
| "options": { | |
| "scales": { | |
| "y": { | |
| "beginAtZero": true | |
| } | |
| } | |
| } | |
| } | |
| </chart-js> | |
| <script> | |
| class ChartJsElement extends HTMLElement { | |
| constructor() { | |
| super(); | |
| this.attachShadow({ mode: 'open' }); | |
| } | |
| connectedCallback() { | |
| const config = JSON.parse(this.getAttribute('value') || this.innerHTML.trim()); | |
| const canvas = document.createElement('canvas'); | |
| this.shadowRoot.appendChild(canvas); | |
| new Chart(canvas, config); | |
| } | |
| } | |
| customElements.define('chart-js', ChartJsElement); | |
| </script> | |
| </body> | |
| </html> |
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