how to enable push.js ajax content loader with ratchet - javascript

i am trying to implement the push.js engine from ratchet:
http://maker.github.com/ratchet/#push
i downloaded the ratchet files from here:
http://maker.github.com/ratchet/ratchet.zip
and am using apache to serve all js, css and html. all files are in the same directory.
here is my one.html file:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Ratchet template page</title>
<!-- Sets initial viewport load and disables zooming -->
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<!-- Include the compiled Ratchet CSS -->
<link rel="stylesheet" href="ratchet.css">
<!-- Include the compiled Ratchet JS -->
<script src="ratchet.js"></script>
</head>
<body>
<!-- Make sure all your bars are the first things in your <body> -->
<header class="bar-title">
<h1 class="title">one.html</h1>
</header>
<!-- Wrap all non-bar HTML in the .content div (this is actually what scrolls) -->
<div class="content">
<ul class="list">
<li>
<a href="two.html">
<strong>two</strong>
<span class="chevron"></span>
</a>
</li>
</ul>
</div>
</body>
</html>
and here is my two.html file:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Ratchet template page</title>
<!-- Sets initial viewport load and disables zooming -->
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<!-- Include the compiled Ratchet CSS -->
<link rel="stylesheet" href="ratchet.css">
<!-- Include the compiled Ratchet JS -->
<script src="ratchet.js"></script>
</head>
<body>
<!-- Make sure all your bars are the first things in your <body> -->
<header class="bar-title">
<h1 class="title">two.html</h1>
</header>
<!-- Wrap all non-bar HTML in the .content div (this is actually what scrolls) -->
<div class="content">
<ul class="list">
<li>
<a href="one.html">
<strong>one</strong>
</a>
</li>
</ul>
</div>
</body>
</html>
how do i link these two files together?
it looks like push.js is included but when i clicking on the a href's does nothing.
i feel like i am missing something glaringly obvious about this implementation.
thanks for the help.

Ratchet works off of touch events, which are not available in your browser. In Chrome go to chrome://flags/ and enable "Force enable touch events". That should do the trick for browser development. If you want to make this work on desktops without the flag you are going to need a js framework to convert touch events to pointer events. Something like https://github.com/maker/ratchet/blob/master/docs/js/fingerblast.js should do the trick.

Ratchet uses touch events on mobile devices that are different than the pointer events used in a desktop browser.
You can use the Chrome flags as mentioned in earlier answers or your can use #fat's fingerblast.js that converts touch events to pointer events.
The fingerblaster.js file can be found here:
https://github.com/stephanebachelier/fingerblast.js
IMPORTANT: In order to enable fingerblaster.js you need to include a script such as the following at the end of your body element (once your html content has loaded):
<script type='text/javascript'>
var fb = new FingerBlast ('body');
</script>
This will create a new FingerBlast object and set the listener on body of the html document (you can put any css selector string in place of 'body').

I asked the same question. Seems like it only works on ios / phones, not on the web browser.
See: https://github.com/maker/ratchet/issues/148

I found that Ripple Emulator works great with this "issue" (I think only is available on Chrome)
It's nice because you don't need to add another js library

Modern Firefox browsers have a web developer feature called "Responsive Design View". It allows you to view a web page in a smaller viewport to simulate use on a phone/tablet. It also allows you to simulate touch events. I found it particularly useful when working with Ratchet on a web app.
In Firefox, you can enable the Responsive Design View by going to Tools -> Web Developer -> Responsive Design View or using the hotkeys "option + command + m".
More information on the Responsive Design View can be found here.

You can download Chrome Canary and with Developer Tools click over Phone icon ( first one ) then select which mobile phone you want to emulate, you can even use Responsinator.com.
PushJS is embedded into ratchet.js.

Use FingerBlast. Tried Chrome, Safari and it worked.
https://github.com/stephanebachelier/fingerblast.js/blob/master/lib/fingerblast.js

On Google Chrome you can use the developer console and emulate a mobile device with touch events
https://developer.chrome.com/devtools/docs/device-mode#emulate-touch-events

Related

Bootstrap: slow loading with the glyphicons

I gave a try to Bootstrap but I'm bit surprised about one thing is that it seems that the Glyphicons are kinda really slow to be loaded or displayed.
I have the feeling that even the carousel is faster to show up.
However, it does not seem that be that slow on other websites.
Therefore, I guess I must have done something wrong, but I do not see a lot of differences with the code used for displaying glyphicons online, is there any way to fix it up?
But so far since I'm trying to run everything locally, it should fast as the light, nope? It takes two seconds for the glyphicons whereas the rest it's instantaneously displayed.
Is there any way to have a better way to measure how fast something can be displayed onto the screen (rather than just using my end-user feeling), please let me know.
Just starting to do web front-end development, please be indulgent.
Here is below the code I am using to display just one glyphicon-home:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<title>My Page...</title>
<!-- Bootstrap core CSS -->
<!-- Latest compiled and minified CSS -->
<link href="boostrap - 3.3.5/css/bootstrap.min.css" rel="stylesheet">
<!-- Favicons... -->
<!-- For IE 9 and below. ICO should be 32x32 pixels in size -->
<!--[if IE]><link rel="shortcut icon" href="favicon.ico"><![endif]-->
<!-- Touch Icons - iOS and Android 2.1+ 180x180 pixels in size. -->
<link rel="apple-touch-icon-precomposed" href="apple-touch-icon-precomposed.png" sizes="180x180">
<!-- Firefox, Chrome, Safari, IE 11+ and Opera. 196x196 pixels in size. -->
<link rel="icon" href="faviconOthers.ico" sizes="196x196">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if IE 9]>
<script src="html5shiv - 3.7.2/html5shiv.min.js"></script>
<script src="respond - 1.4.2/respond.min.js"></script>
<![endif]-->
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script type="text/javascript" src="jquery - 1.11.3/jquery.min.js" ></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script type="text/javascript" src="boostrap - 3.3.5/js/bootstrap.min.js" ></script>
</head>
<body>
<i class="glyphicon glyphicon-home"></i>
</body>
</html>
I found out what was the wrong, the bottom line resided in the bootstrap.min.css.
Reason is that a while ago I used an online bootstrap customizer cause at that time I havent installed any CSS preprocessor yet. It was enough to change a couple of colors.
However, I did not know that the customizer added a couple of links about where to get certain fonts online which I would rather like to avoid since I'm in China and some websites are really slow to access.
E.g.
#font-face{font-family:'Glyphicons Halflings';
src:url(http://bootstrap-live-customizer.com/bootstrap-3.3.5/fonts/glyphicons-halflings-regular.eot);

jQueryMobile routing not working with AngularJS

I'm writing a mobile web app with jQueryMobile and I put in AngularJS to handle data binding. But this introduces routing problems on mobile devices. Below is the minimal code I could write to reproduce the problem. Everything works OK on Chrome on desktop, but when I try the same page from my android device I get the nasty "Error loading page". Problem can be fixed by using data-url for navigation but there's catch. I also need to package it up with phone gap. This means html is loaded by file:// and direct navigation(data-url) doesn't work(I tried)
<!DOCTYPE html>
<html ng-app>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
<script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.3/angular.min.js"></script>
<script src="https://raw.github.com/tigbro/jquery-mobile-angular-adapter/master/compiled/jquery-mobile-angular-adapter-1.2.0.js"></script>
</head>
<body>
<div data-role="page" id="main">
<a data-role="button" href="#sub">sub</a>
</div>
<div data-role="page" id="sub">
<p>sub page</p>
</div>
</body>
</html>
Upon clicking the "sub" button user should be directed to hostname/#sub and it is on Chrome but weird things happen on android and browser is routed to hostname/#!/%23sub
I guess this is URL encoded?
Also I should point out that by removing just the two script refenrences for angular and for JQM-angular adapter everything works(and no databinding of course).
i tried removing angular-jquery adapter and everything works as if by magic.
also no issues with angular and jquery clashing.

White flicker between launch image (splash screen) and app homepage

I have a very simple HTML5 iPhone web application that works almost perfectly; there is only one issue: between the launch image and the app homescreen, a completely white screen appears (i.e. flickers) for about one second.
I'm downloading the app to my phone from the web by using the "Add to Home Screen" button. The javascript file (functions.js) and stylesheet are both very small files.
Has anyone had this problem? Are there any ways to work around/fix it?
index.html
<!doctype html>
<html manifest="demo.manifest">
<head>
<meta charset="UTF-8">
<title>HTML5 Application</title>
<link rel="stylesheet" type="text/css" href="style.css" />
<link rel="apple-touch-icon-precomposed" href="Icon#2x.png" />
<link rel="apple-touch-startup-image" href="Default#2x.png" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="viewport" content="user-scalable=no, width=device-width" />
</head>
<body>
<div id="wrapper">...</div>
</body>
<script type="text/javascript" src="function.js"></script>
</html>
demo.manifest
CACHE MANIFEST
index.html
Default#2x.png
functions.js
style.css
.htaccess
AddType text/cache-manifest .manifest
EDIT #1: I have done some more research and came upon this answer:
Clearing the screen and other artifacts while rendering is a common issue of HTML rendering due to the progressive nature of HTML. The concept is that the browser should draw as early and often as possible and render styles/scripts/content as they become available. It's possible the markup has an issue where all rendering is delayed until some content or a script is available.This could happen if:
You have dynamic heights based on image dimensions but you haven't
set the image dimensions in the markup or CSS.
Your layout is based on tables and you aren't using 'table-layout:fixed` in CSS.
Your HTML uses inline scripts with document.write().
You have some kind of onLoad() function that reveals/modifies content.
You link to an external stylesheet.
You're using uncacheable external content or you've disabled caching.
You're using external content that's returning 404 or isn't available offline.
I have followed all the suggestions in this answer, but it does not rid my web app of the white flicker. Are there any hacks to get around this issue?
EDIT #2: I have tried using no Javascript and a stylesheet with only:
body { background-color: black }
But there is still a white flicker. Since this appears to be an issue with all web applications like this, my question is: Are there any hacks to work around this issue?
CSS selectors are pretty slow on iOS (greedy CSS reset scripts have terrible performance too).
Head initiated javascript self loading DOM-ready scripts and CSS selectors running together compound the issue further. As you have both CSS and javascript requests in the head, there is a small but appreciable delay processing the body, especially the body's background colour.
Most HTML5 frameworks are moving to deferred script loading. As a minmum you want to get the stylesheet loaded first and worry about javascript second. Try putting the css at the top and scripts at the bottom, then inlining a default background colour (not image - there's an appreciable delay on iOS 5 rendering scaled background images and CSS gradients).
You can also try the async attribute on iOS5+, but I haven't tried it myself.
Hope this helps :)
Alright, seems like a basic and annoying problem. I think the best way to tackle this would be via AJAX (Asynchronous JavaScript and XML). I'm sure you probably already know what this is, but it's just a way to basically send a request from JavaScript for a file elsewhere and then load it into the page or parse it however you wish.
A little more advanced approach
For your example, I recommend you comment out the line of CSS that has the background-image like this:
.bg-container {
/* background-image: url(img/bg.png); /* commented out */
}
Note that the second comment just makes it easier to comment and uncomment the one line while debugging your code.
Now just add a simple img tag to your body, and make the src of it an ajax loader (you can find the spinning wheel generators anywhere). From here you can write some JavaScript to load the image, get rid of the spinner, and replace it.
Two simpler approaches
This solution doesn't appeal to me, I don't think most people would like it anyways. That's why I use 'Bootloader.js' which is a little AJAX loading tool I wrote a couple of months ago to help people with these sort of problems.
It's easy to use, aside from the script include, just add this meta tag:
<meta name="bootloader" content="enabled,forms('selectorOfForms'),a('selectorOfAnchors')">
The forms and anchors is optional, if you use it, it will make all your forms and links asynchronous (not for cross-domain use yet). The forms are not easy to setup, you can read the documentation on that if you would like.
Finally, set up your body like this:
<body>
<div id="body">
<!-- All the content should go here -->
</div>
<!-- This will disappear on first ajax load -->
</body>
And there you have it, this will handle everything for you.
Final suggestion
If you don't like any of these options, or want a limited yet customizable option, I recommend you use Image LazyLoader by Mika Tuupola (included with Bootloader.js) and also available at: http://www.appelsiini.net/projects/lazyload
Tell me how it goes, and what you use! XD
This problem occurs with even simple sites.
Take this for example: it shows a website with a background of #ccc with a splashscreen of #ccc for the iphone 7.
<!doctype html>
<html style="background-color: #ccc;">
<head>
<title>iOS web app</title>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-title" content="iOS web app">
<meta name="viewport" content="initial-scale=1">
<link href="https://placehold.it/750x1294" media="(device-width: 375px) and (device-height: 667px)
and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
</head>
<body style="background-color: #ccc;">
<h1>iOS web app</h1>
</body>
</html>
https://imgur.com/a/tGiREVM
You can see a white flicker while the app loads.
Faster loading apps feel worse, slightly epileptic, with the white flash. And if the splash screen is dark, it looks worse again.

iUI Ajax hyperlinks not working in Chrome

I am testing iUI for mobile web apps. Instead of putting all content into a single HTML page, I am using the Ajax hyperlink technique described by Joe Hewitt here. However I cannot get this to work in Chrome, although Joe Hewitt's own Digg demo, which uses the same technique, seems to work correctly.
Here is the simplified source code:
main.html:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>
<link rel="stylesheet" href="iui/iui.css" type="text/css" />
<link rel="stylesheet" href="iui/t/default/default-theme.css" type="text/css"/>
<script type="application/x-javascript" src="iui/iui.js"></script>
</head>
<body>
<div class="toolbar">
<h1 id="pageTitle"></h1>
<a id="backButton" class="button" href="#"></a>
</div>
<ul id="main" title="Main" selected="true">
<li>Go to Screen #1</li>
<li>Go to Screen #2</li>
</ul>
</body>
</html>
screen1.html:
<div class="panel" title="Screen 1">
<ul><li>Hello 1</li></ul>
</div>
screen2.html:
<div title="Screen 2">
Hello 2
</div>
This works fine on Firefox (minus styling issue in screen2.html) but the links do not work on Chrome.
Any pointers?
The AJAX-based navigation used may need to be viewed on a web server to work in certain browsers. If you see an error message when you click a link, try a different browser. When I'm using jQuery Mobile, sometimes the Ajax hyperlink technique works, sometimes it doesn't. Although the same code works fine on Opera.
Looks like does not have anything to do with iUI, rather it is a Chrome issue that affects loading any local files via Ajax.
Here is another SO question related to this issue, this time showing up with JQuery:
Problems with jQuery getJSON using local files in Chrome
The accepted answer includes a link to the bug in the Chromium bug tracker.

quick jQuery question

Should be a really quick one for you pro's:
I'm learning to use JS, in particular a plugin called (embarassingly) 'Easy Image'.
http://cssglobe.com/post/3783/jquery-plugin-easy-image-or-content-slider
Here's my code:
http://jsfiddle.net/tomperkins/LnES6/
JS files are from here:
http://cssglobe.com/post/3783/jquery-plugin-easy-image-or-content-slider
And obviously jQuery (1.5)
I've stripped it down to the basics and can't figure out why it's not working.
Any tips are much appreciated!
Thanks in advance,
Tom
jquery.js and easySlider.js gets an Server error 500 when the browser tries to load them from
http://customstudiodevelopment.co.uk/jquery-test/
Verify that the files are there and that they can be loaded
http://customstudiodevelopment.co.uk/js/jquery.js
http://customstudiodevelopment.co.uk/js/easySlider.js
Unless both these urls load the right JS files your code will not work ...
As a general tip, get FireBug addon to firefox, with the Net panel I found this error in less than 30 seconds ;)
In menu on the left you have to set your framework to JQuery and in Add resources box add 'Easy Image' script. Then comment out first two <script> tags (you will need them on your site but not on jsFiddle). Also change src attributes in <img> tags to absolute path because there is no images folder nor any images on jsFiddle site.
Edit
This is what you get with <script> tags on your site:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
2<html><head>
3<title>500 Internal Server Error</title>
4</head><body>
5<h1>Internal Server Error</h1>
6<p>The server encountered an internal error
Script doesn't work because there are no scripts on your site (both links are dead).
This is working:
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<base href="http://customstudiodevelopment.co.uk"/>
<script type="text/javascript" src="/jquery-test/js/jquery.js"></script>
<script type="text/javascript" src="/jquery-test/js/easySlider.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#slider").easySlider();
});
</script>
<meta charset="utf-8">
<title>jQuery Gallery Test</title>
<link href="/jquery-test/css/style.css" rel="stylesheet" type="text/css" media="all">
</head>
<body>
<div id="slider">
<ul>
<li><img src="/jquery-test/images/Website-Strip_Future.png"></li>
<li><img src="/jquery-test/images/SR-Toomer_small.png"></li>
</ul>
</div>
<!-- /end #slider -->
</body>
</html>
Note, I put the base element in there to test on my desktop. It's not required for it to work on your server, but if it's on your desktop computer, it should work (so you can copy the html into a Notepad file and save with filetype .html and run it locally to test).
It appears as if your file includes (js/css/image) are not pointing to where you want them to be.
Use Firebug to test these types of things. When you open the console, you can inspect the scripts included, including open each included file. In this way, you can doublecheck to make sure the browser is able to get to your included files.
http://getfirebug.com/
http://getfirebug.com/wiki/index.php/Script_Panel
http://getfirebug.com/wiki/index.php/File:Script_Panel.png <<< see del-linkrolls.js close to top, right; that's where you select which file to inspect
When I loaded the page I got an ".ready() is not a function" which would mean you are not loading jQuery. Then again I've never fooled around with jsfiddle

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