Bump to v4.0.0.

padStart.js

@@ -0,0 +1,31 @@
+define(['./internal/createPadding', './toString'], function(createPadding, toString) {
+
+  /**
+   * Pads `string` on the left side if it's shorter than `length`. Padding
+   * characters are truncated if they exceed `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
+   *
+   * _.padStart('abc', 6);
+   * // => '   abc'
+   *
+   * _.padStart('abc', 6, '_-');
+   * // => '_-_abc'
+   *
+   * _.padStart('abc', 3);
+   * // => 'abc'
+   */
+  function padStart(string, length, chars) {
+    string = toString(string);
+    return createPadding(string, length, chars) + string;
+  }
+
+  return padStart;
+});