String substr()
substr(start) #if no length, then till the end
substr(start, length)
start
is a numberlength
is a number
substr() method finds the substring of given length from the given start.
Examples
1. substr(start)
let name = 'abcdefghijklmn';
let output = name.substr(6);
console.log(output);
2. substr(start) with start as negative number. the index is considered from end towards start.
let name = 'abcdefghijklmn';
let output = name.substr(-6);
console.log(output);
3. substr(start, end)
let name = 'abcdefghijklmn';
let output = name.substr(6, 5);
console.log(output);