Regex to check whether string starts with, ignoring case differences

Question

I need to check whether a word starts with a particular substring ignoring the case differences. I have been doing this check using the following regex search pattern but th

Answer 1

For cases like these, JS Regex offers a feature called 'flag'. They offer an extra hand in making up Regular Expressions more efficient and widely applicable.

Here, the flag that could be used is the 'i' flag, which ignores cases (upper and lower), and matches irrespective of them (cases).

Literal Notation:

let string = 'PowerRangers'
let regex = /powerrangers/i
let result = regex.test(string) // true

Using the JS 'RegExp' constructor:

let string = 'PowerRangers'
let regex = new RegExp('powerrangers', 'i')
let result = regex.test(string)