Delete a line of text in javascript

Question

In javascript, If i have a text block like so

Line 1
Line 2
Line 3

What would i need to do to lets say delete the first line and turn it in

Answer 1

I went a bit further to let you be able to select the number of lines from the beginning you want to delete:

I use this regular expression where X is the number of line you want to delete +1 (?:.*?\n){X}(?:.*?\n)

const lines = `Line1
Line2
Line3
Line4`;
const deleteLines = (string, n = 1)=>{
  return string.replace(new RegExp(`(?:.*?\n){${n-1}}(?:.*?\n)`), '');
};
console.log(deleteLines(lines, 2));