how to get all substrings placed between special characters in Javascript code example

Example 1: javascript get text between two words

//Gets the part of the string inbetween the : and the ;
var part = str.substring(
    str.lastIndexOf(":") + 1, 
    str.lastIndexOf(";")
);

Example 2: js .substring

let anyString = 'Mozilla'

// Displays 'M'
console.log(anyString.substring(0, 1))
console.log(anyString.substring(1, 0))

// Displays 'Mozill'
console.log(anyString.substring(0, 6))

// Displays 'lla'
console.log(anyString.substring(4))
console.log(anyString.substring(4, 7))
console.log(anyString.substring(7, 4))

// Displays 'Mozilla'
console.log(anyString.substring(0, 7))
console.log(anyString.substring(0, 10))