我正在学习Polymer,在做菜单的时候遇到了一个小问题。很明显,当我添加下拉菜单时,它显示的是一直打开的,并不是随意关闭和打开的。另外,我检查了Polymer的github repo的代码和它的demo,也找不到我哪里做错了。
<paper-toolbar>
<paper-menu-button>
<paper-icon-button icon="menu" class="dropdown-trigger"></paper-icon-button>
<paper-menu class="dropdown-content">
<paper-item>Share</paper-item>
<paper-item>Settings</paper-item>
<paper-item>Help</paper-item>
</paper-menu>
<paper-menu-button>
</paper-menu-button>
<div class="title">Title</div>
<paper-icon-button icon="refresh"></paper-icon-button>
</paper-toolbar>
你有一个额外的 <paper-menu-button>
之前 </paper-menu-button>
<div class="title">Title</div>
你的代码应该是这样的
<base href="http://polygit.org/polymer+:master/components/">
<script src="webcomponentsjs/webcomponents-lite.min.js"></script>
<link href="polymer/polymer.html" rel="import">
<link href="paper-input/paper-input.html" rel="import">
<link href="paper-slider/paper-slider.html" rel="import">
<link href="paper-toolbar/paper-toolbar.html" rel="import">
<link href="paper-menu/paper-menu.html" rel="import">
<link href="paper-menu-button/paper-menu-button.html" rel="import">
<link href="paper-item/paper-item.html" rel="import">
<link href="paper-icon-button/paper-icon-button.html" rel="import">
<link rel="import" href="iron-icons/iron-icons.html">
<dom-module id="my-app">
<template>
<paper-toolbar>
<paper-menu-button>
<paper-icon-button icon="menu" class="dropdown-trigger">+</paper-icon-button>
<paper-menu class="dropdown-content">
<paper-item>Share</paper-item>
<paper-item>Settings</paper-item>
<paper-item>Help</paper-item>
</paper-menu>
</paper-menu-button>
<div class="title">Title</div>
<paper-icon-button icon="refresh"></paper-icon-button>
</paper-toolbar>
</template>
<script>
addEventListener('WebComponentsReady', function() {
Polymer({
is: 'my-app',
properties: {
}
});
});
</script>
</dom-module>
<my-app></my-app>
我不知道你是否导入了所有所需的 imports
但这里有一个 Plunkr 你可以看到它在行动