Prefer String#codePointAt(…) over String#charCodeAt(…) and String.fromCodePoint(…) over String.fromCharCode(…) 
💼 This rule is enabled in the ✅ recommended config.
💡 This rule is manually fixable by editor suggestions.
Unicode is better supported in String#codePointAt() and String.fromCodePoint().
Fail 
js
const unicorn = '🦄'.charCodeAt(0).toString(16);js
const unicorn = String.fromCharCode(0x1f984);Pass 
js
const unicorn = '🦄'.codePointAt(0).toString(16);js
const unicorn = String.fromCodePoint(0x1f984);