Experimenting with Javascript (ES6) unicode emojis + regenerate + punycode to fix problems with unicode surrogate pairs. Raw

emojis.js

// https://mathiasbynens.be/notes/javascript-unicode

const punycode = require('punycode')
const regenerate = require('regenerate')

let str1 = '☕️'
let str2 = '💩'

let regex = regenerate(str1).toString()
console.log('regex', regex, new RegExp(regex).test(str1))

console.log('str1 length', str1.length)
console.log('str2 length', str2.length)
console.log('str1 decoded', punycode.ucs2.decode(str1))
console.log('str2 decoded', punycode.ucs2.decode(str2))
console.log('str1 unicode', punycode.toUnicode(str1))
console.log('str2 unicode', punycode.toUnicode(str2))
console.log('str1 charCodeAt(0)', str1.charCodeAt(0), str1.charCodeAt(1))
console.log('str2 charCodeAt(0)', str2.charCodeAt(0), str2.charCodeAt(2))