srcmini“Polymerjs “纸张下拉菜单是一个简单的下拉菜单, 用于处理可选内容。使用以下命令将该元素安装在你的项目目录中, 并在你的应用程序中使用。
bower install --save PolymerElements/paper-dropdown-menu
bower install --save PolymerElements/paper-item
bower install --save PolymerElements/paper-listbox
例子
创建一个index.html文件, 并在其中添加以下代码, 以查看Polymer.js中paper-dropdown-menu元素的使用。
<!doctype html>
<html>
<head>
<link rel = 'import' href = 'my-app.html'>
</head>
<body>
<my-app></my-app>
</body>
</html>现在, 打开my-app.html文件, 并在其中包含以下代码。
<link rel = 'import' href='bower_components/polymer/polymer.html'>
<link rel = "import" href = "bower_components/paper-dropdown-menu/paper-dropdown-menu.html">
<link rel = "import" href = "bower_components/paper-item/paper-item.html">
<link rel = "import" href = "bower_components/paper-listbox/paper-listbox.html">
<dom-module id = 'my-app'>
<template>
<style is = "custom-style">
paper-dropdown-menu {
width:250px;
}
paper-dropdown-menu {
height: 200px;
display: block;
}
</style>
<h3>Paper-Dropdown-Menu Example </h3>
<paper-dropdown-menu>
<paper-listbox class = "dropdown-content" selected = "1">
<paper-item>Java Tutorial</paper-item>
<paper-item>C Tutorial</paper-item>
<paper-item>PHP Tutorial</paper-item>
<paper-item>C++ Tutorial</paper-item>
</paper-listbox>
</paper-dropdown-menu>
</template>
<script>
Polymer ({
is: 'my-app', ready: function() {
this.async(function() {
});
}
});
</script>
</dom-module>输出
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