string.padStart

The padStart() method pads the current string with a given string (eventually repeated) so that the resulting string reaches a given length. The pad is applied from the start (left) of the current string.

Syntax

str.padStart(targetLength [, padString])

Parameters

targetLength

The length of the resulting string once the current string has been padded. If this parameter is smaller than the current string's length, the current string will be returned as it is.

padString Optional

The string to pad the current string with. If this string is too long, it will be truncated and the left-most part will be applied. The default value for this parameter is " " (U+0020).

Return value

A String of the specified length with the pad string applied from the start.

Examples

'abc'.padStart(10);         // "       abc"
'abc'.padStart(10, "foo");  // "foofoofabc"
'abc'.padStart(6,"123465"); // "123abc"
'abc'.padStart(8, "0");     // "00000abc"

Specifications

This method has not yet reached the ECMAScript standard. It is currently a proposal for ECMAScript.

Browser compatibility

See also

• String.prototype.padEnd()