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kawanet/escape-emoji.js

Last active January 5, 2021 08:25
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絵文字（Unicode サロゲートペア）をエスケープする関数
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escape-emoji.js
const esc = str => str.replace(/(\\)|[\ud800-\udfff]/g, (m, c) => c ? ('\\' + c) : ("\\u" + m.charCodeAt(0).toString(16)));
esc('\\') === '\\\\';
'🍺' === '\ud83c\udf7a';
esc('🍺') === '\\ud83c\\udf7a';
JSON.parse(esc('"\\"')) === '\\';
JSON.parse(esc('"🍺"')) === '🍺';
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