height(h) {
    // var frame = this.documentElement;
    var frame = this.content;

    if (h && Object(_utils_core__WEBPACK_IMPORTED_MODULE_1__["isNumber"])(h)) {
      h = h + "px";
    }

    if (h) {
      frame.style.height = h; // this.content.style.height = h;
    }

    return parseInt(this.window.getComputedStyle(frame)["height"]);
  }
Get or Set height
@param {number} [h]
@returns {number} height