Introduction
In this article I describe how to create Windows Store Apps for Login using JavaScript. If a command requires a small amount of user input before it can be completed, you can collect that information in a flyout.
I assume you can create a simple Windows Store App using JavaScript; for more help visit Simple Windows Store Apps using JavaScript.
To start the creation of the apps, add one JavaScript page by right-clicking on the js folder in the Solution Explorer and select Add > new item > JavaScript Page and then provide an appropriate name. In the same way, add a HTML page to your project.
![login-windows-store-apps.jpg]()
Write the following code in the default.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>app</title>
<link rel="stylesheet" href="//Microsoft.WinJS.1.0/css/ui-light.css" />
<script src="//Microsoft.WinJS.1.0/js/base.js"></script>
<script src="//Microsoft.WinJS.1.0/js/ui.js"></script>
<link rel="stylesheet" href="/css/default.css" />
<script src="/js/default.js"></script>
</head>
<body role="application" style="background-color: lightcyan">
<center><div id="rootGrid">
<div id="content">
<h1 id="featureLabel"></h1>
<div id="contentHost"></div>
</div>
</div></center>
</body>
</html>
Write the following code in the default.js:
(function () {
"use strict";
var appTitle = "";
var pages = [
{ url: "page.html" }
];
function activated(eventObject) {
if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) {
eventObject.setPromise(WinJS.UI.processAll().then(function () {
var url = WinJS.Application.sessionState.lastUrl || pages[0].url;
return WinJS.Navigation.navigate(url);
}));
}
}
WinJS.Navigation.addEventListener("navigated", function (eventObject) {
var url = eventObject.detail.location;
var host = document.getElementById("contentHost");
host.winControl && host.winControl.unload && host.winControl.unload();
WinJS.Utilities.empty(host);
eventObject.detail.setPromise(WinJS.UI.Pages.render(url, host, eventObject.detail.state).then(function () {
WinJS.Application.sessionState.lastUrl = url;
}));
});
WinJS.Namespace.define("App", {
appTitle: appTitle,
pages: pages
});
WinJS.Application.addEventListener("activated", activated, false);
WinJS.Application.start();
})();
Write the following code in the page.html:
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="/css/collect-information.css" />
<script src="/js/script.js"></script>
</head>
<body>
<div data-win-control="App.pageInput">
<p>
Click the "Login" button to launch the user login flyout.
</p>
<button id="loginButton">
Login</button>
</div>
<div data-win-control="App.pageOutput">
</div>
<div id="loginFlyout" data-win-control="WinJS.UI.Flyout" aria-label="{Login flyout}">
<form onsubmit="return false;">
<p>
<label for="username">
Username
<br />
</label>
<span id="usernameError" class="error"></span>
<input type="text" id="username" />
</p>
<p>
<label for="password">
Password<br />
</label>
<span id="passwordError" class="error"></span>
<input type="password" id="password" />
</p>
<button id="submitLoginButton">
Login</button>
</form>
</div>
</body>
</html>
Write the following code in the script.html:
(function () {
var loggedIn;
"use strict";
var page = WinJS.UI.Pages.define("page.html", {
ready: function (element, options) {
document.getElementById("loginButton").addEventListener("click", showLoginFlyout, false);
document.getElementById("submitLoginButton").addEventListener("click", submitLogin, false);
document.getElementById("loginFlyout").addEventListener("afterhide", onDismiss, false);
}
});
function showLoginFlyout() {
loggedIn = false;
WinJS.log && WinJS.log("", "app", "status", "status");
var loginButton = document.getElementById("loginButton");
document.getElementById("loginFlyout").winControl.show(loginButton);
}
function submitLogin() {
var error = false;
if (document.getElementById("password").value.trim() === "") {
document.getElementById("passwordError").innerHTML = "Password cannot be blank";
document.getElementById("password").focus();
error = true;
} else {
document.getElementById("passwordError").innerHTML = "";
}
if (document.getElementById("username").value.trim() === "") {
document.getElementById("usernameError").innerHTML = "Username cannot be blank";
document.getElementById("username").focus();
error = true;
} else {
document.getElementById("usernameError").innerHTML = "";
}
if (!error) {
loggedIn = true;
WinJS.log && WinJS.log("You have logged in.", "app", "status");
document.getElementById("loginFlyout").winControl.hide();
}
}
function onDismiss() {
document.getElementById("username").value = "";
document.getElementById("usernameError").innerHTML = "";
document.getElementById("password").value = "";
document.getElementById("passwordError").innerHTML = "";
if (!loggedIn) {
WinJS.log && WinJS.log("You have not logged in.", "app", "status");
}
}
})();
Output:
![login-windows-store-app.jpg]()
Summary
In this article I described how to create a Windows Store App for Login using JavaScript. I hope this article has helped you to understand this topic. Please share it. If you know more about this, your feedback and constructive contributions are welcome.