This JavaScript exception invalid regular expression flag occurs if the flags, written after the second slash in RegExp literal, are not from either of (g, i, m, s, u, or y).
Message:
SyntaxError: Syntax error in regular expression (Edge) SyntaxError: invalid regular expression flag "x" (Firefox) SyntaxError: Invalid regular expression flags (Chrome)
Error Type:
SyntaxError
Cause for Error: Somewhere in the code, There are regular expression flags that are not valid.
Example 1: This example has valid RegExp flags.
Javascript
let patt = /neveropen/i;let str = 'This is neveropen';console.log(str.match(patt)); |
Output:
GeeksForGeeks
Example 2: In this example, After the second slash ‘GFG’ is used as a flag that is invalid.
Javascript
let patt = /Geek/GFG;let str = 'This is neveropen';console.log(str.match(patt)); |
Output(in console):
SyntaxError: Invalid regular expression flags
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
