使用【plus.webview】对象实现右侧弹出菜单栏：
点击菜单图标弹出菜单列表，点击页面其它地方或点击【关闭菜单】收缩菜单。
index.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<title></title>
<script type="text/javascript">
document.addEventListener('plusready', function(){
//console.log("所有plus api都应该在此事件发生后调用，否则会出现plus is undefined。")
});
</script>
</head>
<body>
<div style="width: 100%;height: 60px;background: #eee;">
<div style="float: right;height: 60px;line-height: 60px; margin-right: 10px;font-size: 25px;" onclick="OpenMenu()">
<span class="glyphicon glyphicon-tasks"></span>
</div>
</div>
</body>
<script type="text/javascript">
function OpenMenu(){
var curr=plus.webview.currentWebview();
var menu=plus.webview.create("pages/Menu.html","menu",{"width":"40%","left":"60%","top":"62px"});
curr.setStyle({
mask:"rgba(0,0,0,0)"
});
curr.addEventListener("maskClick",function(){
curr.setStyle({
mask:"none"
});
menu.close();
});
menu.show("zoom-fade-out",200);
}
</script>
</html>
菜单界面：pages/Menu.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<title></title>
<script type="text/javascript">
document.addEventListener('plusready', function(){
//console.log("所有plus api都应该在此事件发生后调用，否则会出现plus is undefined。")
});
</script>
</head>
<body>
<div style="margin-right: 5px;background: #4c4c4c;border-radius: 5px;">
<ul>
<li><span class="glyphicon glyphicon-comment"></span> 发起群聊</li>
<li><span class="glyphicon glyphicon-user"></span> 添加朋友</li>
<li><span class="glyphicon glyphicon-camera"></span> 扫一扫</li>
<li><span class="glyphicon glyphicon-folder-open"></span> 收付款</li>
<li onclick="BackIndex()"><span class="glyphicon glyphicon-comment"></span> 关闭菜单</li>
</ul>
</div>
<style>
li{
font-size: 12pt;
cursor: pointer;
height: 50px;
color: #fff;
line-height: 50px;
border-bottom: 1px solid #5d5d5d;
list-style-type: none;
}
</style>
<script type="text/javascript">
function BackIndex(){
var menu=plus.webview.currentWebview();
var index=menu.opener();
menu.close();
index.setStyle({
mask:"none"
});
}
</script>
</body>
</html>
plus.webview.currentWebview();//获取当前webview对象
webviewObj.opener();//获取创建当前webview的webview对象
webviewObj.setStyle()；//设置webview对象的样式
webviewObj.close()；//关闭webview界面
webviewObj.show()；//显示webview界面
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