A random offset replace function

Question

Is there a function for replacing a substring from a certain position (not from the beginning) in Javascript ?

Answer 1

You can use replace() it'll replace a substring with new string you provided
But if you want to replace a substring from certain index, you'll need to write the function yourself
its pretty simple, substring 0 to startindex, add the new string, add substring from endindex to end string

Answer 2

Substring and substr can do that
First parameter is the offset

Answer 3

But I need to replace the substring