--- /dev/null
+var charsStartIndex = require('./internal/charsStartIndex'),
+ stringToArray = require('./internal/stringToArray'),
+ toString = require('./toString');
+
+/** Used to match leading and trailing whitespace. */
+var reTrimStart = /^\s+/;
+
+/**
+ * Removes leading whitespace or specified characters from `string`.
+ *
+ * @static
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The string to trim.
+ * @param {string} [chars=whitespace] The characters to trim.
+ * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
+ * @returns {string} Returns the trimmed string.
+ * @example
+ *
+ * _.trimStart(' abc ');
+ * // => 'abc '
+ *
+ * _.trimStart('-_-abc-_-', '_-');
+ * // => 'abc-_-'
+ */
+function trimStart(string, chars, guard) {
+ string = toString(string);
+ if (!string) {
+ return string;
+ }
+ if (guard || chars === undefined) {
+ return string.replace(reTrimStart, '');
+ }
+ chars = (chars + '');
+ if (!chars) {
+ return string;
+ }
+ var strSymbols = stringToArray(string);
+ return strSymbols.slice(charsStartIndex(strSymbols, stringToArray(chars))).join('');
+}
+
+module.exports = trimStart;