Polymer scrolling issue

匿名 (未验证) 提交于 2019-12-03 02:20:02

问题:

Hi I'm just playing around a bit with polymer and got a problem.

First here is the Page I'm editing: http://beta.sgbvm.de/app/site/berichte.php

The most things works pretty well (e.g. transitions etc) but when i scroll down the list and then click on a card the site stays at the bottom, but i want it to scroll up.

By now i searched the for nearly 5 hours but i cant figure out how to scroll back to the top after i click on a card.

I read something about accessing the shadowDom but i didnt unterstand what they where talking.

<html>     <head>       <title>SG Bergedorf/VM - mobile Seite</title>        <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">       <script src="../components/platform/platform.js"></script>       <link rel="import" href="../components/core-drawer-panel/core-drawer-panel.html">       <link rel="import" href="../components/core-header-panel/core-header-panel.html">       <link rel="import" href="../components/core-toolbar/core-toolbar.html">       <link rel="import" href="../components/core-icon-button/core-icon-button.html">       <link rel="import" href="../components/core-icon/core-icon.html">       <link rel="import" href="../components/core-menu/core-menu.html">       <link rel="import" href="../components/core-item/core-item.html">       <link rel="import" href="../components/paper-fab/paper-fab.html">       <link rel="import" href="../components/paper-icon-button/paper-icon-button.html">       <link rel="import" href="../components/paper-ripple/paper-ripple.html">       <link rel="import" href="../components/font-roboto/roboto.html">       <link rel="import" href="../components/core-animated-pages/core-animated-pages.html">       <link rel="import" href="../components/core-animated-pages/transitions/cross-fade.html">       <link rel="import" href="../components/core-animated-pages/transitions/slide-up.html">       <link rel="import" href="../components/core-animated-pages/transitions/hero-transition.html"> </head> <body style="background-color:#F0F0F0;" unresolved touch-action="auto">         <core-drawer-panel>             <core-header-panel drawer style="background-color:#fff;">                 <core-toolbar style="background-color:#3a3a3a;"><div class="bottom titleDrawer">SG B/VM</div></core-toolbar>                 <core-menu class="drawer">                     <div class="headline"><b>W&auml;hle:</b></div>                     <core-item icon="mail" label="Nachrichten" onClick="self.location.href='index.php'"></core-item>                     <core-item icon="content-paste" label="Spielberichte" onClick="self.location.href='berichte.php'"></core-item>                 </core-menu>              </core-header-panel>              <core-header-panel id="mainContainer" mode="waterfall-tall" main>                 <core-toolbar class="tall animate">                     <core-icon-button icon="menu" class="buttonDrawer" onclick="document.querySelector('core-drawer-panel').togglePanel();"></core-icon-button>                     <div flex></div>                     <div class="bottom indent title">Berichte</div>                 </core-toolbar>                 <core-animated-pages class="content" style="background-color:#F0F0F0;" transitions="hero-transition cross-fade slide-up">                     <section id="page1" style="background-color:#F0F0F0;" cross-fade horizontal layout wrap>  /** Left out a bit here **/                     </section>                      <section id="page2" style="background-color:#F0F0F0;">                           <div id="ergebnisBig" style="width:100%" cross-fade>                             <table cellpadding='0' border='0' cellspacing='0' style='width:100%; background-color:#3a3a3a;' id="placeholderTable" hero>                                 <tr style="width:100%;">                                     <td style="width:40px;">                                         &nbsp;&nbsp;<paper-fab icon="arrow-back" role="button" class="mini" onclick='changeBack();' slide-up></paper-fab>                                     </td>                                     <td class='ergebnisBig' id='placeholderErgebnis'>                                         &nbsp;                                     </td>                                     <td style="width:40px;">                                         <a name="top" id="top">&nbsp;</a>                                     </td>                                 </tr>                                 <tr>                                     <td id="placeholderHalbzeit" class='halbzeitBig' colspan="3"></td>                                 </tr>                                 <tr>                                     <td id="placeholderTeams" class='teamsBig' colspan="3"></td>                                 </tr>                                                </table>                         </div>                         <div style="width:100%;" horizontal center-justified layout>                             <div id="placeholderText" class="card" style="width:93%;padding:10px;" slide-up>                              </div>                         </div>                      </section>                   </core-animated-pages>             </core-header-panel>         </core-drawer-panel> </body> </html> 

回答1:

core-header-panel provides a scroller property which gives you access to the internal scrolling div. From there, you can use vanilla JS to scroll it (using scrollTop).

document.querySelector('#mainContainer').scroller.scrollTop = 0; 


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