lodash/string/padLeft.js

define(['../internal/baseToString', '../internal/createPad'], function(baseToString, createPad) {

  /**
   * Pads `string` on the left side if it is shorter then the given padding
   * length. The `chars` string may be truncated if the number of padding
   * characters exceeds the padding length.
   *
   * @static
   * @memberOf _
   * @category String
   * @param {string} [string=''] The string to pad.
   * @param {number} [length=0] The padding length.
   * @param {string} [chars=' '] The string used as padding.
   * @returns {string} Returns the padded string.
   * @example
   *
   * _.padLeft('abc', 6);
   * // => '   abc'
   *
   * _.padLeft('abc', 6, '_-');
   * // => '_-_abc'
   *
   * _.padLeft('abc', 3);
   * // => 'abc'
   */
  function padLeft(string, length, chars) {
    string = baseToString(string);
    return string && (createPad(string, length, chars) + string);
  }

  return padLeft;
});