Uncaught SyntaxError: fails on first Regex function, but not second

this question is different because the first function errors, but the other identical functions work fine.

Question: Why does the first function fail, but not the second? …in these JS Regex functions, from a 3rd party lib used to parse float/ints etc with the help of the regex function.

Please advise how do I troubleshoot fix this error?

>Solution :

According to https://developer.mozilla.org/en-US/docs/Glossary/Syntax_error

Syntax errors are detected while compiling or parsing source code.

Once the browser encounters a syntax error, it stops parsing the script and reports the error immediately.

You can run these two snippets in DevTools console to see it in action:

const a = text => text.replace(/.*/ g)
const b = text => text.replace(/.*/ g)
// VM744:1 Uncaught SyntaxError: missing ) after argument list
// Only reported the first error on line 1,
// even though the code after isn't valid JavaScript either

const a = text => text.replace(/.*/g)
const b = text => text.replace(/.*/ g)
// VM754:2 Uncaught SyntaxError: missing ) after argument list
// Now that the error is fixed on line 1,
// the parser moved on to find the error on line 2 and reports it

Hope this helps!