JavaScript String padStart()
Examples
Pad a string with "0" until it reaches the length 4:
let text = "5";
let padded = text.padStart(4,"0");
Try it Yourself »
Pad a string with "x" until it reaches the length 4:
let text = "5";
let padded = text.padStart(4,"x");
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Description
The padStart() method pads a string from the start.
The padStart() method pads a string with another string (multiple times) until it reaches a given length.
See Also:
Note
The padStart() method is a string method.
To pad a number, convert the number to a string first.
See the example below.
Example
let numb = 5;
let text = numb.toString();
let padded = text.padStart(4,"0");
Try it Yourself »
Syntax
string.padStart(length, string)
Parameters
| Parameter | Description |
| length | Required. The length of the resulting string. |
| string | Optional. The string to pad with. Default is space. |
Return Value
| Type | Description |
| A string | A String of the specified length, with the padding applied from the start. |
Browser Support
padStart() is an ECMAScript 2017 feature.
ES2017 is supported in all modern browsers since September 2017:
| Chrome 58 | Edge 15 | Firefox 52 | Safari 11 | Opera 45 |
| Apr 2017 | Apr 2017 | Mar 2017 | Sep 2017 | May 2017 |
padStart() is not supported in Internet Explorer.
