24 lines
573 B
JavaScript
24 lines
573 B
JavaScript
// @flow
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export function toCodePoint(unicodeSurrogates: string, sep: ?string) {
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var r = [],
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c = 0,
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p = 0,
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i = 0;
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while (i < unicodeSurrogates.length) {
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c = unicodeSurrogates.charCodeAt(i++);
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if (p) {
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r.push((0x10000 + ((p - 0xd800) << 10) + (c - 0xdc00)).toString(16));
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p = 0;
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} else if (0xd800 <= c && c <= 0xdbff) {
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p = c;
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} else {
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r.push(c.toString(16));
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}
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}
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return r.join(sep || '-');
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}
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export function emojiToUrl(text: string) {
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return `https://twemoji.maxcdn.com/2/72x72/${toCodePoint(text)}.png`;
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}
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