RegEx: Boundary Assertions I

Assume a program only reads .js or .jsx files. Write a function that accepts a file path and returns true if it can read the file and false if it can't.

Examples

isJS("/users/user.jsx") ➞ true

isJS("/users/user.js") ➞ true

isJS("/users/user.ts") ➞ false

Notes

Use a RegEx boundary assertion in your function.