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Strings

String.padEnd()

Add characters to the end of a string if it’s less than a certain length. Accepts two arguments: the length the string should be, and what characters to add if it’s not that length. The characters to use is optional, and defaults to a space ().

// Add a leading zero for hours below 10
var minutes0 = '0';
var minutes12 = '12';

// returns "00"
minutes0.padEnd(2, '0');

// returns "12"
minutes12.padEnd(2, '0');

Requires a polyfill for IE.