paper-header-panel - 手动将处理程序分配给事件内容滚动

Question

使用 polymer 1.1，我不想为 paper-header-panel 制作自定义元素或模板。如何在滚动事件上分配处理程序？

我试过了：

bob = Polymer.dom(document).querySelector('paper-header-panel');
bob.scrollHandler = function() {
  console.log('ssssssss');
} 

没有成功。

https://github.com/PolymerElements/paper-header-panel/blob/master/paper-header-panel.html#L186

来自文档

Polymer({
  is: 'paper-header-panel',
  /**
   * Fired when the content has been scrolled.  `event.detail.target` returns
   * the scrollable element which you can use to access scroll info such as
   * `scrollTop`.
   *
   *     <paper-header-panel on-content-scroll="{{scrollHandler}}">
   *       ...
   *     </paper-header-panel>
   *
   *
   *     scrollHandler: function(event) {
   *       var scroller = event.detail.target;
   *       console.log(scroller.scrollTop);
   *     }
   *
   * @event content-scroll
   */

和

  ready: function() {
    this.scrollHandler = this._scroll.bind(this);
    this._addListener();

Answer 1

如果我没看错你的问题，你想在js中这样订阅事件-

ready: function () {
    this.$.panel.addEventListener("content-scroll", function () {
        console.log('ssssssss');
    });
}

但是我没明白为什么你不能像文档中那样做。

---

bob = Polymer.dom(document).querySelector('paper-header-panel');
bob.addEventListener("content-scroll", function () {
    console.log('ssssssss');
}