code: function trimmedLeftIndex(string) {
      var index = -1,
          length = string.length;
  
      while (++index < length) {
        var c = string.charCodeAt(index);
        if (!((c <= 160 && (c >= 9 && c <= 13) || c == 32 || c == 160) || c == 5760 || c == 6158 ||
            (c >= 8192 && (c <= 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279)))) {
          break;
        }
      }
      return index;
    }
docs: Gets the index of the first non-whitespace character of `string`.
  
  @private
  @param {string} string The string to inspect.
  @returns {number} Returns the index of the first non-whitespace character.