Regex to find Arrow Functions

Comments

[Ravi Tuvar]

const isArrowFn = (fn) =>
(typeof fn === 'function') &&
!/^(?:(?:\/*[^(?:*\/)]*\/\s)|(?:\/\/[^\r\n]))\s*(?:(?:(?:async\s(?:(?:\/*[^(?:*\/)]*\/\s)|(?:\/\/[^\r\n]))\s*)?function|class)(?:\s|(?:(?:\/*[^(?:*\/)]*\/\s)|(?:\/\/[^\r\n])))|(?:[$\w][\w0-9$]\s(?:\/*[^(?:*\/)]*\/\s)\s()|(?:[\s*(?:\/*[^(?:*\/)]*\/\s)\s(?:(?:['][^']+['])|(?:["][^"]+["]))\s*(?:\/*[^(?:*\/)]*\/\s)\s]())/.test(fn.toString());

[Ravi Tuvar]

function (?[a-zA-Z0-9]+)\s*(?([^()])(?::\s[^{}\s])?)\s(?{[^\r{}](?:{[^\r{}](?:{[^\r{}](?:{[^\r{}](?:{[^\r{}](?:{[^\r{}]}[^\r{}])}[^\r{}])}[^\r{}])}[^\r{}])}[^\r{}])})(?:;)?

[Ravi Tuvar]

/([=]) (\([\w\s].*[\w\s]\)|\(\)) =>/gmi

[Ravi Tuvar]

Working fine..

[Ravi Tuvar]

([=]) (([\w\s].*[\w\s])|()) =>

[Ravi Tuvar]

/(([\w\s].*[\w\s])|()) =>/gmi

[Ravi Tuvar]

(([\w\s].*[\w\s])|()) =>

[Dendi Handian]

what are you doing here exactly?

[JoelBonetR 🥇]

*whispering: shhhhh, can't you see he's thinking out loud? 😂

[Jakub T. Jankiewicz]

The question is why you need regex? What is the use case. You may be better with using JavaScript parser like Esprima.