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35 lines
891 B
JavaScript
35 lines
891 B
JavaScript
/**
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* Detects support for emoji character sets.
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*
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* Based on the Modernizr emoji detection.
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* https://github.com/Modernizr/Modernizr/blob/347ddb078116cee91b25b6e897e211b023f9dcb4/feature-detects/emoji.js
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*
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* @return {Boolean} true or false
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* @example
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*
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* hasEmojiSupport()
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* // => true|false
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*/
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export const hasEmojiSupport = () => {
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const pixelRatio = window.devicePixelRatio || 1;
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const offset = 12 * pixelRatio;
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const node = document.createElement('canvas');
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// canvastext support
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if (
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!node.getContext ||
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!node.getContext('2d') ||
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typeof node.getContext('2d').fillText !== 'function'
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) {
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return false;
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}
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const ctx = node.getContext('2d');
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ctx.fillStyle = '#f00';
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ctx.textBaseline = 'top';
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ctx.font = '32px Arial';
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ctx.fillText('\ud83d\udc28', 0, 0); // U+1F428 KOALA
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return ctx.getImageData(offset, offset, 1, 1).data[0] !== 0;
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};
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