Eri*_*ann 6 templatetag web-component polymer polymer-1.0
使用Polymer 1.0,我创建了一个纸质抽屉面板布局.在抽屉里,我有一个使用纸质菜单的菜单,纸质菜单被绑在铁页上.我从Content Switcheroo使用Core-Pages - Polycasts#09获取此示例并将其转换为使用Polymer 1.0元素.在下面的代码中,您可以看到我的评论部分,其中纸质项目是硬编码的.这很好用.
我的下一步是尝试动态构建我的菜单,使用该<template is="dom-repeat">元素迭代任意数组的菜单项.菜单正确呈现(我可以看到绑定到数组的所有菜单项),但我无法点击这些项目,也没有显示铁页面.似乎用于attr-for-selected的data-category属性在内部不起作用<template is="dom-repeat">.
我可以通过哪些方式实现这一目标？编辑:删除attr-for-selected属性并使用索引工作切换铁页,但在我的情况下,依赖于数组的索引不是一个选项.
我的index.html如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>My Test</title>
<script src="bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<link rel="import" href="bower_components/polymer/polymer.html">
<link rel="import" href="bower_components/iron-icons/iron-icons.html">
<link rel="import" href="bower_components/iron-pages/iron-pages.html">
<link rel="import" href="bower_components/paper-drawer-panel/paper-drawer-panel.html">
<link rel="import" href="bower_components/paper-toolbar/paper-toolbar.html">
<link rel="import" href="bower_components/paper-header-panel/paper-header-panel.html">
<link rel="import" href="bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="bower_components/paper-item/paper-item.html">
<link rel="import" href="bower_components/paper-styles/paper-styles.html">
<link rel="import" href="bower_components/paper-menu/paper-menu.html">
<style>
</style>
</head>
<body>
<my-app></my-app>
<dom-module id="my-app">
<style>
</style>
<template>
<paper-drawer-panel>
<paper-header-panel drawer class="fit">
<paper-toolbar>
<div>Drawer</div>
</paper-toolbar>
<paper-menu class="content fit" selected="{{page}}" attr-for-selected="data-category">
<!-- This works -->
<!--
<paper-item data-category="item1" label="item1">
<span>John Smith</span>
</paper-item>
<paper-item data-category="item2" label="item2">
<span>Jane Doe</span>
</paper-item>
-->
<!-- This does not work -->
<template is="dom-repeat" items="{{names}}">
<paper-item data-category="{{item.itemNum}}" label="{{item.itemNum}}">
<span>{{item.first}}</span><span>{{item.last}}</span><span>{{item.itemNum}}</span>
</paper-item>
</template>
</paper-menu>
</paper-header-panel>
<paper-header-panel main class="fit">
<paper-toolbar>
<paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
<div class="flex">Main Content</div>
</paper-toolbar>
<iron-pages selected="{{page}}" attr-for-selected="data-category">
<section data-category="item1">
<h1>Item 1</h1>
<div>Item 1 content...</div>
</section>
<section data-category="item2">
<h1>Item 2</h1>
<div>Item 2 content...</div>
</section>
</iron-pages>
</paper-header-panel>
</paper-drawer-panel>
</template>
<script>
Polymer({
is: "my-app",
ready: function() {
this.names = [{itemNum: "item1", first: "John", last: "Smith"}, {itemNum: "item2", first: "Jane", last: "Doe"}];
}
});
</script>
</dom-module>
</body>
</html>
尝试<paper-item data-category$="{{item.itemNum}}" label$="{{item.itemNum}}">从文档中调用paper-item.setAttribute('data-category',itemNum)而不是paper-item.data-category = itemNum.
https://www.polymer-project.org/1.0/docs/devguide/data-binding.html#attribute-binding