I have working javascript mobile app which I have been trying to restructure (correctly or incorrectly). The index.html file contained one page (using data-role="page") with various <div> elements that I hide and show depending what the user wants to do. I thought I could improve the structure by putting each of these <div> elements each in their own page (still in the index.html file) using data-role again. However, the subsequent pages lose their javascript functionality. I have created a very simple index.html file to demonstrate:
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/jquery.mobile-1.3.2.min.css" />
<script type="text/javascript" src="js/jquery-1.9.1.min.js"/></script>
<script type="text/javascript" src="js/jquery.mobile-1.3.2.min.js"></script>
</head>
<body>
<div data-role="page" id="mainPage">
<INPUT type="button" id="showPageTwo" value="Show Next Page" />
</div>
<div data-role="page" id="secondPage">
<INPUT type="button" id="showMainPage" value="Show Main Page" />
</div>
<script>
$(document).on("pageshow", "#mainPage", function(e) {
alert("Main page");
$("#showPageTwo").click(function()
{
$("#secondPage").show();
$("#mainPage").hide();
});
});
$(document).on("pageshow", "#secondPage", function(e) {
alert("Second page");
$("#showMainPage").click(function()
{
$("#mainPage").show();
$("#secondPage").hide();
});
});
</script>
</body>
</html>
Main page displays correctly, the alert is displayed $("#showPageTwo").click(function() works. But none of the javascript runs when secondPage loads.
Additionally when secondPage is shown it does not have the styling from jquery.mobile-1.3.2.min.css that mainPage has.
What am I doing wrong or misunderstanding? (This is when running the app in the Eclipse AVD)
Additionally, I would like to know:
Is the way I am trying to restructure my code using data-role="page" good or bad practice? Is there a recommended way to structure "pages" in a mobile app?
I also want to put my custom script(s) in their own .js file(s). Can I only load the script shown in the above code before the </body> tag? Is there any way to load it in the header along with all the other scripts?
Related
I have following HTML,
$(document).ready(function() {
$('#searchMovieBtn').click(function(e) {
e.preventDefault();
console.log('search');
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="searchMovieBtnBox">
<button class="btn btn-primary" type="button" id="searchMovieBtn">Search</button>
</div>
When I click on button, nothing happens, it seems like event is not triggering.
It is a caching issue. When you was developing and testing your JQuery code, your old code remained into the browser cache. Browser cached it to load page faster in next uses. In order to solve this problem you have 3 options.
Delete your browser history
Refresh your browser by pressing Ctrl + F5 (Preferred for developing purpose)
Tell browser that this JQuery code has changed by adding a version for it. It is used when you are publishing your code on the server because you can't ask your clients to delete their browser history or load your page by pressing Ctrl + F5
Here is how you could add version to your JQuery code:
<script type="text/javascript" src="js/script.js?v=1"></script>
Look at v=1. Next time when you updated your JQuery code change it to v=2 to tell browser that your code has been changed.
You can try the next thing,
First of all, your HTML markup I think it might be wrong as you are not pointing out correctly the folders.
I attached all the css and js bootstrap + jquery files through a CDN.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script
src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"</script>
<script type="text/javascript" src="js/script.js"></script>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<title> jQuery button click event working?</title>
</head>
<body>
<div id="searchMovieBtnBox">
<button class="btn btn-primary" type="button" id="searchMovieBtn">Search</button>
</div>
</body>
</html>
Therefore,your script.js stays as it is.
For me it has worked like this. I got the message printed onto my console.
Hope that helps you.
Make sure you don't have another element in the HTML with the same id.
<html>
<head>
<title>Quiz Application</title>
<script type="text/javascript" charset="utf-8" src="cordova-1.9.0.js"></script>
<script type="text/javascript" charset="utf-8">
function ready()
{
if(document.getElementById("rb2").checked)
{
alert("correct");
}else if(document.getElementById("rb1").checked)
{
alert("incorrect");
}
else
{
alert("incorrect");
}
}
function nextPage()
{
window.location = "next.html";
}
</script>
</head>
<body>
<form method="post">
<center><h1>Quiz Application</h1></center><br><br>
<center>What does JVM stands for ?<br><br>
<radiogroup>
<input type="radio" id="rb1"/>Java Vendor Machine<br>
<input type="radio" id="rb2"/>Java Virtual Machine<br>
<input type="radio" id="rb3"/>Java Viral Machine<br>
<input type="submit" id="sub" value="Freeze" onclick="ready();"/><br>
<input type="submit" id="next" value="Next Question" onclick="nextPage();"/></center>
</radiogroup>
</form>
</body>
</html>
Above is my code for redirecting my page to next page after click event.
But it is not redirecting to next page.I went through many questions on stackoverflow as well but didnt succeed.
Please help me .
Thanks in advance.
What are you doing there? If you're doing it with jQuery mobile an example would look like this:
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="css/stylesheet.css">
<script type="text/javascript" src="js/jquery-2.1.4.min.js"></script>
<script type="text/javascript" src="js/jquery.mobile-1.4.5.min.js"> </script>
</head>
<body>
<div data-role="page" id="page1">
<p>This is page 1. If you want to go to Page 2 click here.
</div>
<div data-role="page" id="page2">
<p>This is page 2. If you want to go back to Page 1 click here.
</div>
</body>
</html>
Changing a page by function could look like this:
function changePage() {
$.mobile.changePage( "#loginPAGE", { transition: "none", changeHash: true });
}
Here's a pen: http://codepen.io/anon/pen/gaeoQE
Frameworks - Mobile App Development
So like i said in my comment, i would recommend you to use a framework. Since i don't know, how conversant you're in JavaScript and anything else i think you should start with jQuery. For mobile App development it's not one of the best frameworks in my opinion but it's easy to learn and thats important for you to start.
So jQuery is a thing for your website. For your mobile application you need jQuery mobile.
You go to that websites and download both. When your download is finished, you're going to open up your index.html and add the scripts to your <head></head> section so that it looks like the following:
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css" />
<script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
These things are important. Also the order in which you include the scripts is important.
After adding this to your header, you're able to access a whole bunch of functions. All of the features are testable inside a demo environment which can be found over here: jQuery mobile Demos (1.4.5).
When you have finished that, you're going to copy my code from my pen into your <body></body> and it should work. For changing a page via javascript you can use the function changePage() which i've already posted before.
I hope this will help you, if not please let me know where exactly i can help you.
I found out the solution for my query . i just wrote the following function onClick of a button (input type should be button and not submit then only it will work)
function nextPage()
{
document.location="nextpage.html"; //instead of window.location
}
In jQuery mobile I want to load pagecontainers from external files. I can add the markup to my DOM, but the problem I am facing afterwards is that as soon as I navigate to #page2, the entire #page1-div disappears from the DOM and thus I cannot navigate back (Please see screenshots below).
DOM before clicking "Go To Page 2"
DOM after clicking "Go To Page 2"
As you can see, the entire #page1-div is gone for good. Why is that? Any thoughts? Please see my markup and code below:
test.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link rel="stylesheet" type="text/css" href="http://code.jquery.com/mobile/1.4.3/jquery.mobile-1.4.3.min.css" />
<title>Hello jqm</title>
</head>
<body>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.3/jquery.mobile-1.4.3.min.js"></script>
<script>
$(document).ready(function(){
$(document).on( "pagecontainerload", function( event, ui ) {
console.log('navigating to page1...');
$.mobile.pageContainer.pagecontainer("change", "#page1");
console.log('navigating done!');
} );
console.log('loading pagecontainers...');
$.mobile.pageContainer.pagecontainer("load", "page1.html");
$.mobile.pageContainer.pagecontainer("load", "page2.html");
console.log('pagecontainer-load done!');
});
</script>
</body>
</html>
page1.html
<div data-role="page" id="page1">
<div data-role="header">
<h1>Page 1</h1>
</div>
<div role="main" class="ui-content">
Go To Page 2
</div>
</div>
page2.html
<div data-role="page" id="page2" class="page2">
<div data-role="header">
<h1>Page 2</h1>
</div>
<div role="main" class="ui-content">
Go Back To Page 1
</div>
</div>
Remarks: This is a follow up question to this one: jQuery mobile - Splitting up pages to different files
jQuery Mobile removes external pages when you navigate away of them. You should leave a base page cached in DOM rather than loading all pages.
Solution one: in test.html, add html markup of page1.html and load page2.html externally.
Solution two: add data-dom-cache="true" to page1 div to keep it cached even if it's loaded externally.
<div data-role="page" id="page1" data-dom-cache="true">
Update
You can cache all external pages at once without the need to add data-dom-cache to each and every page div. All you need to do is to globally set domCache option of page widget to true on mobileinit event. The code should be placed after jQuery.js and before jQuery-Mobile.js.
<script src="jquery.js" />
<script>
$(document).on("mobileinit", function () {
$.mobile.page.prototype.options.domCache = true;
});
</script>
<script src="jquery-mobile.js" />
For this case, you should try to init the page manually
In page1:
$(document).bind("mobileinit", function () {
...
$.mobile.autoInitializePage = false;
$.mobile.initializePage();
});
In page2:
$(function () {
$.mobile.activePage = null;
$.mobile.initializePage();
});
This is my solution for switch 2 pages not in same HTML.
problem is, that the website is loading like for about 20 second or longer (user-problems preprogrammed)
my solution was to load a pre-site where the user sees a loading screen.
i did this with this html-site but i want to do the same in php.
the test-page is http://kater.selfhost.me/test/
Source Code:
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<script type="text/javascript">
window.onload = function() {
document.getElementById("siteLoader").style.display = "none";
document.getElementById("container").style.display = "block";
}
</script>
</head>
<body>
<div id="container" style="display:none">
<div id="body">
<iframe src="http://kater.selfhost.me/stats/skins.php" frameborder="0" height="2000px" width="1024px"></iframe>
</div>
</div>
<div id='siteLoader'>
<div id='siteDetailLoader'>
<img src='ajax_loader.gif' border='0'>
Please wait while the page loads...<br /> <br />
</div>
</div>
</body>
</html>
i tried some workarounds, but after searching & testing for about three hours i give up...
thanks in advance for any help provided! :-D
Adding what I alredy said at your question commentary, I made a code loading this content via AJAX:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$( document ).ready(function() {
//Load content
loadAjaxContent();
});
function loadAjaxContent()
{
//VERY IMPORTANT: the URL domain MUST HAVE be the same as your request
//that's why I'm not writting the full http://kater.selfhost.me/stats/skins.php
$.ajax({
url: "/stats/skins.php"
}).done(function(data) {
//remove loader
$("#siteLoader").hide();
//put PHP content
$("#ajaxContent").html(data);
});
}
</script>
</head>
<body>
<div id="body">
<div id="ajaxContent" style="width:1024px;"></div>
<div id='siteLoader'>
<div id='siteDetailLoader'>
<img src='ajax_loader.gif' border='0' />
Please wait while the page loads...<br /> <br />
</div>
</div>
This is the most used way to load asynchronous content in the web. But pay attention at this: The http://kater.selfhost.me/stats/skins.php page is made to open as single page in the web, so it has <html> , <head>, <body> , etc.. tags, so..after loading this page into another you'll have two <html>, <body> .. tags in a same page, this is bad, but modern browsers have an awesome common sense and don't bother by this, but you should know that, and be aware.
The actual problem why it isn't loading yet, is this javascript in your content:
<script type="text/javascript"><!--
EXref="";top.document.referrer?EXref=top.document.referrer:EXref=document.referrer;//-->
</script>
I removed that and now works fine. Remember that's a quick fix, I don't know what this JS does.
Why it works in <iframe> and doesn't via AJAX? When you open in <iframe> is like opening in a new browser window..and via AJAX, as I have said, it'll load the page content straight inside your "parent" page.
So, removing this Javascript will work, but awesome further solutions:
If you need to open this page both as content to load (via AJAX), both as single page, you can make two pages.. one for each need.
If you just want to use as content to load, remove <html>, <head>, etc.. tags, and fix Javascript to work inside another page.
I am trying to use jQuery to open an href inside a div, rather than simply linking to the new page. I have viewed a number of tutorials but the load() function does not seem to be working for me.
Please take a look at my code and let me know what piece of puzzle is missing.
Here is my HTML page:
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Jquery</title>
</head>
<body>
<!-- nav links to open in div#content area -->
<a class="menu_top" href="pages/home.php">Home</a> | <a class="menu_top" href="pages/about.php">About</a> | <a class="menu_top" href="pages/contact.php">Contact</a>
<!-- div for links to open in -->
<div id="content-area"></div>
<script type="text/javascript" src="jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="js/nav.js"></script>
</body>
And my jQuery Javascript:
$('.menu_top').click(function() {
var href=$(this).attr('href');
alert (href);
$('#content_area').load(href);
//return false;
});
I added alert to make sure the URL was being retrieved, and it is, then it would completely load then new page. So I added "return false" and it did nothing after the alert suggesting that the load() was not working.
Initially was running this through WAMP so I tried running the page directly from the folder and the browser tried to download the linked pages instead of opening them. I also tried uploading to a remote web site and got the same result as on WAMP.
Try:
$('.menu_top').click(function() {
var href=$(this).attr('href');
alert (href);
$('#content-area').load(href);
//return false;
});
Because your div is called #content-area, not #content_area.