string.sub js code example
Example 1: substring javascript
var str = "Hello world!";
var res = str.substring(1, 4);
Example 2: js .substring
let anyString = 'Mozilla'
console.log(anyString.substring(0, 1))
console.log(anyString.substring(1, 0))
console.log(anyString.substring(0, 6))
console.log(anyString.substring(4))
console.log(anyString.substring(4, 7))
console.log(anyString.substring(7, 4))
console.log(anyString.substring(0, 7))
console.log(anyString.substring(0, 10))
Example 3: js substr
var str = 'abcdefghij';
console.log('(1, 2): ' + str.substr(1, 2));
console.log('(-3, 2): ' + str.substr(-3, 2));
console.log('(-3): ' + str.substr(-3));
console.log('(1): ' + str.substr(1));
console.log('(-20, 2): ' + str.substr(-20, 2));
console.log('(20, 2): ' + str.substr(20, 2));