How to remove part of a string?

Question

Let’s say I have test_23 and I want to remove test_.

How do I do that?

The prefix before _ can change.

Answer 1

If you want to remove part of string

let str = "test_23";
str.replace("test_", "");
// 23

If you want to replace part of string

let str = "test_23";
str.replace("test_", "student-");
// student-23