Develop Reference

cordova-plugin-printer printing raw html instead of rendered html

I am using cordova-plugin-printer for one of my Cordova app. I have installed the plugin, and also able to access android native printing service. The plugin's print function can be called in app using it's function cordova.plugins.printer.print(); as described in the plugin documents here and on it's git repository.
I actually need to print a selected <div> from the HTML, using JavaScript/jQuery.
But the problem I'm facing is that when I am passing html as a var this plugin is printing raw HTML, and not the rendered HTML as desired. Where as, if I directly pass HTML code, as a parameter, it gives the desired result.
My Example Code:
When I call
cordova.plugins.printer.print('<h1>How r u</h1>');//print as desired.
But when I write code like this:
<div id="printable">
<h1>How are you</h1>
</div>
var printable = $("#printable").html();
cordova.plugins.printer.print(printable);//prints raw html
Can anyone help? or correct me what am I doing wrong? seems to be something silly, which I am probably unable to figure out.

You need to remove line breaks from your html.
Try
var printable = $("#printable").html();
printable = printable.replace(/(\r\n|\n|\r)/gm, '');
cordova.plugins.printer.print(printable);

Embed HTML5 / JS Web App with parameters

I have been given a JSON url which returns some data. I need to create a javascript / html5 / css app that will grub this data and return it in a list.
Up to there I'm ok with doing this.
My issue is that I then need to be able to provide a <script></script> which the user can paste in any other website to display the web app.
The script or iframe need to be able to take parameters so it can filter the returned data.
Can anyone guide me in the right direction on instructions on how to do this?

The simplest way is using global variables.
Edit: added a way to "embed" the generated content. I use jQuery in the example, but it can be easily done with any other DOM manipulation library or plain JS.
The final user add an HTML element with a specific id and a <script> tag containing the parameters. We use a div element in the example.
<div id="generated-list"></div>
<script>
// the user defines parameters
var configParameters = {param1: 'some value', param2: ['is', 'array']};
</script>
The final user should paste your code. I have no idea how is your code, so I made this up:
<script>
// The user pastes your script here
// which may be a function accepting the defined parameters
function createList(configParameters) {
// create the necessary elements and append them to the element
// with the right id
// We create an empty ul element in the example
var newList = $('<ul></ul>');
$('#generated-list').append(newList);
}
</script>
Google analytics uses a similar approach

How to document.write() within an image src string? Doesn't get parsed

This is for a Javascript application that is only intended to run on a local machine, accessing many large image files from local disk.
Original code like this:
<script>
// Constants, var inits, etc.
</script>
<-- Then html stuff including some control buttons, each one like this -->
<img id="pgb_runStop" onclick="click_runStop()" src="buttons/but_run.png">
<--then a chunk of javascript related to the buttons -->
The thing works OK, see http://everist.org/NobLog/20150424_js_animated_gallery.htm
Now I want to extend it, so all image pathnames are defined as js constants and vars.
Some will remain fixed during lifetime of the browser page, others will change by
user actions.
I'm stuck with one part of this.
How to get the html parser to pay attention to script blocks WITHIN <img .... > statements?
Specifically, I want to do a document.write() within the image src string.
Like: <img src="<script>document.write(B_PATH)</script>something.png">
This is for the initial page display. The images later get changed by scripts, and that's working OK.
But the html parser doesn't seem to notice scripts inside html elements.
I'm a javascript nubie, so I may have some stupid misconception of how it all works.
Am I just doing it wrong, or is this fundamentally impossible due to reasons?
Here's an example:
<script>
// Constants
PGL_BUT_PATH = "buttons/" // where the button images etc are.
</script>
<-- some html stuff -->
<-- including some control buttons, each one like this -->
<img id="pgb_runStop" onclick="click_runStop()"
src="<script>document.write(PGL_BUT_PATH);</script>but_run.png">
<--then a chunk of javascript related to the buttons -->
In debugger, the img element appears as:
<img id="pgb_runStop" onclick="click_runStop()"
src="<script>document.write(PGL_BUT_PATH);</script>but_run.png"/>
The intent was to get this:
<img id="pgb_runStop" onclick="click_runStop()"
src="buttons/but_run.png"/>
I could just give up with trying to have the page initially render with the correct buttons, and have js correct them afterwards. I'm just surprised... Isn't it possible to evaluate js constants during initial html parsing to construct the DOM, in this way?
Edit to add:
Sorry, I wasn't clear enough in the question. What I want is a way for js to make the html content/DOM correct (per js config values that get defined very early on) BEFORE the page first renders. To avoid any flicker or resizings after first render.
So another solution would be to delay the first page render till after some scripts have run, so they can make initial DOM adjustments before the user sees anything. Any way to do that?
Hmmm... actually that would solve another problem I have. I'll try searching for that.
The semantic templating tools suggest are interesting (had never heard of it. http://www.martin-brennan.com/semantic-templates-with-mustache-js-and-handlebars-js/ ) but am I correct that all such scripting add-ons will execute after the page first renders?

You cannot embed a tag within another tag's attribute. So you cannot embed a <script> inside the src of an <img>. That's just invalid won't-be-parsed HTML.
What you can do, though, is write the attribute after the fact:
<img id="uniqueId">
<script>
var img = document.getElementById('uniqueId')
img.setAttribute('src', PGL_BUT_PATH)
</script>
The <img> tag without a src attribute in that is invalid HTML technically, although it will probably work in any browser anyway. But if you want to stay totally legit, create the <img> with JavaScript too.
<div id="uniqueId"></div>
<script>
var elem = document.getElementById('uniqueId');
var img = document.createElement('img');
img.setAttribute('src', PGL_BUT_PATH);
elem.appendChild(img);
</script>

Tthough I really have no idea why would you like to do this.
This one works for me
<img id="pgb_runStop" onclick="click_runStop()"
src = "about:blank"
onerror="javascript:this.src = PGL_BUT_PATH + 'but_run.png'; this.onerror = null;>
or Another way
<script>
function createImg(src) {
document.write("<img src='" + src + "'>");
}
</script>
<script>createImg(PGL_BUT_PATH + 'but_run.png')</script>
Another more generic approach
<script>
function templete(temp, src) {
document.write(temp.replace("$STR", src));
}
</script>
<script>templete('<img id="pgb_runStop" onclick="click_runStop()" src="$STR"/>', PGL_BUT_PATH + 'but_run.png')</script>

Javascript isn't a templating engine in and of itself, and it looks like that's what you're trying to achieve here. Look into a javascript template library such as Handlebars and you'll have more luck.

Unfortunately, JavaScript doesn't work that way you are setting the src to <script></script> which all the browser thinks of it is just a weird URL. Try:
document.getElementById('pgb_runStop').src = PGL_BUT_PATH + 'but_run.png';
You can change pgb_runStop to whatever is the id of the element.
You can use a Framework like Angular.js to do things like that. I don't use angular.js myself but you can of some pretty incredible stuff with it.
Here's a list of even more engines that you can use
You can also use:
document.getElementById('pgb_runStop')setAttribute('src', PGL_BUT_PATH + 'but_run.png');
Basically, you can do:
(function(){window.onload=function(){
document.getElementById('pgb_runStop')setAttribute('src', PGL_BUT_PATH + 'but_run.png');
};}());
Which should function the exact same

Why not write the whole image in:
document.write('<img src="' + PGL_BUT_PATH + 'but_run.png"/>');
Fiddle

Can I use embedded Javascript in a ghost blog entry?

I am using the Ghost Blogging Software and tumbled over Tangle these days. So it would be great to be able to use that in some of my Blog posts.
I have included the Tangle-files in my theme and load them in default.hbs. However, I cannot find a way to embed some javascript (to be executed, but not displayed) in the markdown document. I would like to write the javascript in the markdown document too as I do not want to add js-Files to my theme each time I write a blog post with reactive content.
Is there a way to do this?

It seems there is. You should be able to include the JavaScript you want to run by just placing it inside of <script> tags like they talk about on this post
Edit: To further explain, a markdown file is just different syntax for creating html tags, but you can use regular html and script tags inside them. To get an script to run per the above link, you should only need to include whatever js you want to run inside of the script tags. This example should work inside of a markdown post file to replicate the Tangle example on the doc page
When you eat <span data-var="cookies" class="TKAdjustableNumber"> cookies</span>,
you consume <span data-var="calories"> calories</span>.
<script>
var tangle = new Tangle(document, {
initialize: function () { this.cookies = 3; },
update: function () { this.calories = this.cookies * 50; }
});
</script>

Getting content of a script file using Javascript

I have the following script element in my web page:
<script src="default.js" type="text/javascript"></script>
Using JavaScript, I want to be able to retrieve the content of the script file. I know I could use an ajax request to get the data but then I am getting something from the server that I already have locally.
So what I would prefer to do is retrieve the content from the DOM (if that's possible) or something that has the same result.
Cheers
Anthony
UPDATE
I was trying to simplify the question, maybe a bad a idea, I thought this way would cause less questions.
The real situation I have is as follows, I actually have
<script type="text/html" class="jq-ItemTemplate_Approval">
...
html template that is going to be consumed by jQuery and jTemplate
...
</script>
Now this works fine but it means each time the page loads I have to send down the template as part of the HTML of the main page. So my plan was to do the following:
<script src="template.html" type="text/html"></script>
This would mean that the browser would cache the content of template.html and I would not have to send it down each time. But to do this I need to be able to get the content from the file.
Also in this case, as far as I know, requesting the content via ajax isn't going to help all that much because it has to go back to the server to get the content anyway.

If I understand you correctly, you don't want to use Ajax to load an html template text, but rather have it loaded with the rest of the page. If you control the server side, you can always include the template text in an invisible div tag that you then reference from Javascript:
<div id="template" style="display:none;">
...template text...
</div>
<script>
// pops up the template text.
alert(document.getElementById("template").innerHTML);
</script>
If you are just looking for to load the template so that you can have it cached, you can put the contents in a variable like this:
<script>
var template = "template text..";
</script>
or you can load it using ajax and store the template in a variable so it is accessible. It's pretty trivial in jquery:
var template;
$.get("template.html", function(data){
template = data;
});

unless you load a script as literal text in the page, it does not exist as text. It is interpreted by the browser and melded into the runtime, with any other scripts.
If you want the source you have to fetch it again,if with Ajax get the responseText.
It will come from the browser cache, and doesn't have to be downloaded again.

I think what you want to do is to assign a variable inside template.js. Then you have the variable available for use wherever you want in jquery. Something like:
var tpl = "<div> ... </div>"
Wouldn't this be a simpler solution to your problem? We do this in Ext JS. I think this will work for you in jQuery.

You could get the attribute of the src of the script and then use XHR to get the contents of the JS file. It's a much cleaner way of doing it IMO. e.g.:-
if(window.XMLHttpRequest) {
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if(xhr.status == 200 && xhr.readyState == 4) {
var sourceCode = xhr.responseText;
alert('The source code is:-\n'+sourceCode);
}
}
xhr.open("GET",document.getElementById('scriptID').src,true);
xhr.send(null);
}

Using an iFrame & HTML5 Local Storage
Save the templates for rendering later...
not stoked about the iFrame, but it seems to be working pretty good (haven't ran performance tests yet)
Put the iFrame on the page you want the template on (index.html)
<html>
<head>
<iframe src="mustache.Users.html" onload="this.remove();" class="hidden" id="users_template"></iframe>
</head>
</html>
Make sure the src attribute is set
hide the element until you can get rid of it after it loads
Put this body wrapper around your template (mustache.Users.html)
(don't worry it won't show up in the template)
<body onload="localStorage.setItem('users_template',this.document.body.innerHTML);">
<ul class="list-group" id="users" >
{{#users}}<li>{{name}}</li>{{/users}}
</ul>
</body>
replace 'users_template' with whatever name for your variable
the 'onload' attribute saves the template into localStorage during load
Now You can access your templates from anywhere
localStorage.getItem('users_template')
OR
window.localStorage.getItem('users_template')

What is in the JavaScript file? If it's actual code, you can run functions and reference variables in there just like you had cut and paste them into the webpage. You'll want to put the include line above any script blocks that reference it.
Is this what your looking to accomplish?

Why not use Ajax (well Ajah because its html :-))?
when the server is set up correctly and no no-cache or past expires headers are sent, the browser will cache it.

The way that most JavaScript import files work is they include a script, that immediately calls a function with a parameter of certain text, or of another function. To better illustrate, say you have your main index.html file, set it up like this:
<html>
<head>
</head>
<body>
<script>
let modules = {};
function started(moduleName, srcTxt) {
modules[moduleName] = (srcTxt) //or something similar
}
</script>
<!--now you can include other script tags, and any script tags that will be included, their source can be gotten (if set up right, see later)-->
<script src="someOtherFile.js"></script>
</body>
</html>
now make that other file, someOtherFile.js, and right away when its loaded, simply call that "started" function which should already be declared in the scope, and when thats done, then whatever text is passed, from the file, is stored in the main index.html file. You can even stringify an entire function and put it in, for example:
started("superModule", (function() {
/*
<?myCustomTemplateLanguage
<div>
{something}Entire Javascript / html template file goes here!!{/something}
</div>
?>
*/
}).toString());
now you can access the inner content of the function, and get all the text in between the comments, or better yet, then do other parsing etc, or make some other kind of parsing identifiers at the beginning and end of the comments, as shown above, and get all text in between those