问题
Paper-dropdown-menu component seems to be working fine on the polymer website [ https://www.polymer-project.org/components/paper-dropdown-menu/demo.html ].
However, I downloaded polymer/web components 0.5.1 and the menu doesn't seem to render at all [on any browser]. [ http://idineth.com/garage-website/bower_components/paper-dropdown-menu/demo.html ]
Any idea why this is the case? Polymer website seems to be using the same branch if I'm not mistaken.
回答1:
Try adding these imports.
<link rel="import" href="bower_components/web-animations-next/web-animations.html">
<link rel="import" href="bower_components/web-animations-js/web-animations.html">
来源：https://stackoverflow.com/questions/27198932/polymer-paper-dropdown-menu-not-working