@material/top-app-bar
Version:
The Material Components for the web top app bar component
59 lines • 2.63 kB
JavaScript
/**
* @license
* Copyright 2018 Google Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import { __extends } from "tslib";
import { cssClasses } from '../constants';
import { MDCTopAppBarFoundation } from '../standard/foundation';
var MDCFixedTopAppBarFoundation = /** @class */ (function (_super) {
__extends(MDCFixedTopAppBarFoundation, _super);
function MDCFixedTopAppBarFoundation() {
var _this = _super !== null && _super.apply(this, arguments) || this;
/**
* State variable for the previous scroll iteration top app bar state
*/
_this.wasScrolled = false;
return _this;
}
/**
* Scroll handler for applying/removing the modifier class on the fixed top app bar.
*/
MDCFixedTopAppBarFoundation.prototype.handleTargetScroll = function () {
var currentScroll = this.adapter.getViewportScrollY();
if (currentScroll <= 0) {
if (this.wasScrolled) {
this.adapter.removeClass(cssClasses.FIXED_SCROLLED_CLASS);
this.wasScrolled = false;
}
}
else {
if (!this.wasScrolled) {
this.adapter.addClass(cssClasses.FIXED_SCROLLED_CLASS);
this.wasScrolled = true;
}
}
};
return MDCFixedTopAppBarFoundation;
}(MDCTopAppBarFoundation));
export { MDCFixedTopAppBarFoundation };
// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.
export default MDCFixedTopAppBarFoundation;
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