padStart method
The padStart method pads the start
of the current string with another string
(several times if necessary) up to the
specified length. The first parameter in
the method is a desired length of the
string, and the second optional parameter
is the string with which it will be filled.
Syntax
string.padStart(string length, [string for padding]);
Example
Let's pad the string 'ab' so
that its length is 4 characters:
let res = 'ab'.padStart(4);
console.log(res);
The code execution result:
' ab'
Example
Let's increase a string length to
8 characters by padding it
with '0':
let res = 'abcde'.padStart(8, '0');
console.log(res);
The code execution result:
'000abcde'
Example
Let's set the first parameter of the method to a number that is less than a length string:
let res = 'ab'.padStart('1');
console.log(res);
As a result of executing the code, the entire string will be returned:
'ab'
