substr method code example

Example 1: substring

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

Example 2: javascript substring

// zero-based index, 'end' is excluded from result
myString.substring( start, end )

Example 3: cut string from string javascript

var ret = "data-123".replace('data-','');
console.log(ret);   //prints: 123

Example 4: straforma in string js

var x = new String("Una nuova stringa");