I need to implement a print page functionality with the following restrictions:
i cannot have a print view (no print.jsp to point to)
i cannot rely on print.css alone (because i have to move stuff around a lot in the DOM to get the page i want to print)
So i implemented this little script that can help clarifying where i'm going with this:
$(document).ready(function(){
$('a#print').click(function(){
var body = $('body');
var pageClone = body.clone(true);
$('div#search, div.chapters, div#footer').hide();
$('div.content').css('width', '100%');
$('div#logo').css('float', 'right');
window.print();
//reset the content and then copy it back
body.html('');
body.html(pageClone);
return false;
});
});
Now what this prints is the whole page before my DOM changes. So that's not what i want, so i was thinking i could graft the window.print() function to the body element, something like this:
var body = $('body');
jQuery.extend(body, {print:function(){return window.print(); }});
body.print();
Except this approach still prints the window content, not the body content if that was ever the problem.
Can you help me to print only the body as implemented in the DOM after my changes?
Thanks
you might want to check out jQPrint. it's a nifty little plugin that lets you specify which parts of the page you want to print.
http://plugins.jquery.com/project/jqPrint
You can open a new window (with window.open()), write your updated DOM into that, and then print from that window instead of your main window.
Browser print facilities remain surprisingly primitive.
Related
I've created this code to print data from an iFrame
function (data) {
var frame = $("<iframe>", {
name: "iFrame",
class: "printFrame"
});
frame.appendTo("body");
var head = $("<head></head>");
_.each($("head link[rel=stylesheet]"), function (link) {
var csslink = $("<link/>", { rel: "stylesheet", href: $(link).prop("href") })
head.append(csslink);
;});
frame.contents().find("head")
.replaceWith(head);
frame.contents().find("body")
.append(this.html());
window.frames["iFrame"].focus();
window.frames["iFrame"].print();
}
This creates an iFrame, adds a head to where it sets all the css links that are needed for this website. Then it creates the body.
Trouble is, the styling won't get applied to the print, unless I break at line frame.contents().find("head").replaceWith(head), which means that something in that part is running asynchronously.
Question is, can I somehow get the code to wait for a short while before running that line, or is there perhaps another way to do this? Unfortunately I'm not all that familiar with iFrames, so I have no clue what it's trying to do there.
This turned out to be a real hassle. I've always been reluctant to using iframes, but since there are many resources saying that using an iframe for printing more stuff than what's on the screen, we figured we'd give it a try.
This was instead solved by putting the data inside a hidden div which then was shown before a window.print(). At the same time, all other elements on the page were given a "hidden-print" class which is a class we're already using to hide elements for prints.
This might not be as elegant for the user (The div will show briefly before the user exits the print dialogue), but it's a way more simpler code to use and manage.
I think you could / should move the last focus() and print() calls to a onload handler for the iframe, to get it to happen after styles are loaded and applied.
I've just run into the same issue and did the following:
setTimeout(() => {
window.frames["iFrame"].focus();
window.frames["iFrame"].print();
}, 500)
This appears to have sorted it for me. I hate using timeout and the length is guess work at best but as it's not system critical it's something I can run with for now.
So I'm not that great with Javascript so I'll put that forward right away. That being said, I've looked up as much as I could on this particular problem before asking, but the suggestions haven't solved my issues. I'm ultimately trying to pull all of the links from an iframe window on the same domain as the main page. Then I want to basically search that link array to match it with the current page to trigger a CSS modification to the html code (this part is not coded yet, FYI). So here is the part I have so far: Side note: The confirms are in there to debug the code and try to tell me where it's failing and what my queries are returning, they won't stay obviously when this is finished. I appreciate any advice that may help me fix this!
<script type="text/javascript">
// main is the iframe that I'm trying to search for a tags
document.getElementById("main").onload = function() {
confirm("test");
var main = document.getElementById("main");
var anchors = main.contentWindow.document.getElementsByTagName('a');
confirm(anchors[1]);
for (var i in anchors) {
confirm(anchors[i].getAttribute("href"));
}
};
</script>
I have created a plunker for you its working. I think its the placement of code in your file is causing the problem.
<iframe id="main" src="content_if.html"></iframe>
<script>
// main is the iframe that I'm trying to search for a tags
document.getElementById("main").onload = function() {
confirm("test");
var main = document.getElementById("main");
var anchors = main.contentWindow.document.getElementsByTagName('a');
confirm(anchors[1]);
for (var i in anchors) {
confirm(anchors[i].getAttribute("href"));
}
};
</script>
You should use jQuery to do this in a cross browser way. Include jQuery in page
<script src="https://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
and follow this post
There is a similar post about doing this and I agree with Mohamed-Yousef. If you can use jquery then you should do so!
$("#main").contents().find("a").each(function(element) {
// "each" will iterate through every a tag and inject them as the "element" argument
// visible in the scope of this anonymous function
});
EDIT:
You must include
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
above your code that references the $ variable. There are other ways to use jQuery but this is probably the easiest.
I have a question about javascript/html.
First, I have this:
var post = document.body.getElementsByClassName("post");
var x=post[i].getElementsByClassName("MyDiv")[0].innerHTML;
I get from the debugger that x is not defined, it doesn't exists.
This javascript function runs onload of the body. I am sure that I gave the right classnames in my javascript, so it should find my div.
So, I read somewhere that sometimes javascript does not find an element because it is not yet there, it is not yet created in the browser ( whatever that means).
Is it possible that my function can't find the div with that classname because of this reason?
Is there a solution?
So, I read somewhere that sometimes javascript does not find an element because it is not yet there, it is not yet created in the browser ( whatever that means).
Browsers create the DOM progressively as they get the markup. When a script element is encountered, all processing of the markup stops (except where defer and async have an effect) while the script is run. If the script attempts to access an element that hasn't been created yet (probably because its markup hasn't been processed yet) then it won't be found.
This javascript function runs onload of the body.
If that means you are using something like:
<body onload="someFn()"...>
or perhaps
<script>
window.onload = function() {
someFn();
...
}
</script>
then when the function is called, all DOM nodes are available. Some, like images, may not be fully loaded, but their elements have been created.
If it means you have the script in the body and aren't using the load event, you should move the script to the bottom of the page (e.g. just before the closing body tag) and see if that fixes the issue.
Okay, instead of calling functions with
body onload, use jQuery's ready() function, or, if you don't want to use jQuery, you can use pure javascript, but this is up to you:
// jQuery
$(document).ready(function() {
var post = document.getElementsByClassName("post"),
x = post[i].getElementsByClassName("MyDiv")[0].innerHTML;
});
// JavaScript
window.onload = function initialization() {
var post = document.getElementsByClassName("post"),
x = post[i].getElementsByClassName("MyDiv")[0].innerHTML;
}
A few side notes, I don't know what the use of innerHTML
is, and also if you're doing a for loop with i then definitely
post that code, that's kind of important.
After some discussion, my answer seems to have worked for you, but you can also place your script at the end of your body tag as #RobG has suggested.
I am trying to load Skyscanner API dynamically but it doesn't seem to work. I tried every possible way I could think of and all it happens the content disappears.
I tried console.log which gives no results; I tried elements from chrome's developers tools and while all the content's css remains the same, still the content disappears (I thought it could be adding display:none on the html/body sort of). I tried all Google's asynch tricks, yet again blank page. I tried all js plugins for async loading with still the same results.
Skyscanner's API documentation is poor and while they offer a callback it doesn't work the way google's API's callback do.
Example: http://jsfiddle.net/7TWYC/
Example with loading API in head section: http://jsfiddle.net/s2HkR/
So how can I load the api on button click or async? Without the file being in the HEAD section. If there is a way to prevent the document.write to make the page blank or any other way. I wouldn't mind using plain js, jQuery or PHP.
EDIT:
I've set a bounty to 250 ontop of the 50 I had previously.
Orlando Leite answered a really close idea on how to make this asynch api load although some features doesn't work such as selecting dates and I am not able to set styling.
I am looking for an answer of which I will be able to use all the features so that it works as it would work if it was loading on load.
Here is the updated fiddle by Orlando: http://jsfiddle.net/cxysA/12/
-
EDIT 2 ON Gijs ANSWER:
Gijs mentioned two links onto overwriting document.write. That sounds an awesome idea but I think it is not possible to accomplish what I am trying.
I used John's Resig way to prevent document.write of which can be found here: http://ejohn.org/blog/xhtml-documentwrite-and-adsense/
When I used this method, I load the API successfuly but the snippets.js file is not loading at all.
Fiddle: http://jsfiddle.net/9HX7N/
I belive what you want is it:
function loadSkyscanner()
{
function loaded()
{
t.skyscanner.load('snippets', '1', {'nocss' : true});
var snippet = new t.skyscanner.snippets.SearchPanelControl();
snippet.setCurrency('GBP');
snippet.setDeparture('uk');
snippet.draw(document.getElementById('snippet_searchpanel'));
}
var t = document.getElementById('sky_loader').contentWindow;
var head = t.document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.type = 'text/javascript';
script.onreadystatechange= function() {
if(this.readyState == 'complete') loaded();
}
script.onload= loaded;
script.src= 'http://api.skyscanner.net/api.ashx?key=PUT_HERE_YOUR_SKYSCANNER_API_KEY';
head.appendChild(script);
}
$("button").click(function(e)
{
loadSkyscanner();
});
It's load skyscanner in iframe#sky_loader, after call loaded function to create the SearchPanelControl. But in the end, snippet draws in the main document. It's really a bizarre workaround, but it works.
The only restriction is, you need a iframe. But you can hide it using display:none.
A working example
EDIT
Sorry guy, I didn't see it. Now we can see how awful is skyscanner API. It puts two divs to make the autocomplete, but not relative to the element you call to draw, but the document.
When a script is loaded in a iframe, document is the iframe document.
There is a solution, but I don't recommend, is really a workaround:
function loadSkyscanner()
{
var t;
this.skyscanner;
var iframe = $("<iframe id=\"sky_loader\" src=\"http://fiddle.jshell.net/orlleite/2TqDu/6/show/\"></iframe>");
function realWorkaround()
{
var tbody = t.document.getElementsByTagName("body")[0];
var body = document.getElementsByTagName("body")[0];
while( tbody.children.length != 0 )
{
var temp = tbody.children[0];
tbody.removeChild( temp );
body.appendChild( temp );
}
}
function snippetLoaded()
{
skyscanner = t.skyscanner;
var snippet = new skyscanner.snippets.SearchPanelControl();
snippet.setCurrency('GBP');
snippet.setDeparture('uk');
snippet.draw(document.getElementById('snippet_searchpanel'));
setTimeout( realWorkaround, 2000 );
}
var loaded = function()
{
console.log( "loaded" );
t = document.getElementById('sky_loader').contentWindow;
t.onLoadSnippets( snippetLoaded );
}
$("body").append(iframe);
iframe.load(loaded);
}
$("button").click(function(e)
{
loadSkyscanner();
});
Load a iframe with another html who loads and callback when the snippet is loaded. After loaded create the snippet where you want and after set a timeout because we can't know when the SearchPanelControl is loaded. This realWorkaround move the autocomplete divs to the main document.
You can see a work example here
The iframe loaded is this
EDIT
Fixed the bug you found and updated the link.
the for loop has gone and added a while, works better now.
while( tbody.children.length != 0 )
{
var temp = tbody.children[0];
tbody.removeChild( temp );
body.appendChild( temp );
}
For problematic cases like this, you can just overwrite document.write. Hacky as hell, but it works and you get to decide where all the content goes. See eg. this blogpost by John Resig. This ignores IE, but with a bit of work the trick works in IE as well, see eg. this blogpost.
So, I'd suggest overwriting document.write with your own function, batch up the output where necessary, and put it where you like (eg. in a div at the bottom of your <body>'). That should prevent the script from nuking your page's content.
Edit: OK, so I had/took some time to look into this script. For future reference, use something like http://jsbeautifier.org/ to investigate third-party scripts. Much easier to read that way. Fortunately, there is barely any obfuscation/minification at all, and so you have a supplement for their API documentation (which I was unable to find, by the way -- I only found 'code wizards', which I had no interest in).
Here's an almost-working example: http://jsfiddle.net/a8q2s/1/
Here's the steps I took:
override document.write. This needs to happen before you load the initial script. Your replacement function should append their string of code into the DOM. Don't call the old document.write, that'll just get you errors and won't do what you want anyway. In this case you're lucky because all the content is in a single document.write call (check the source of the initial script). If this weren't the case, you'd have to batch everything up until the HTML they'd given you was valid and/or you were sure there was nothing else coming.
load the initial script on the button click with jQuery's $.getScript or equivalent. Pass a callback function (I used a named function reference for clarity, but you can inline it if you prefer).
Tell Skyscanner to load the module.
Edit #2: Hah, they have an API (skyscanner.loadAndWait) for getting a callback once their script has loaded. Using that works:
http://jsfiddle.net/a8q2s/3/
(note: this still seems to use a timeout loop internally)
In the skyrunner.js file they are using document.write to make the page blank on load call back... So here are some consequences in your scenario..
This is making page blank when you click on button.
So, it removes everything from page even 'jQuery.js' that is why call back is not working.. i.e main function is cannot be invoked as this is written using jQuery.
And you have missed a target 'div' tag with id = map(according to the code). Actually this is the target where map loads.
Another thing i have observed is maps is not actually a div in current context, that is maps api to load.
Here you must go with the Old school approach, That is.. You should include your skyrunner.js file at the top of the head content.
So try downloading that file and include in head tag.
Thanks
I have a jquery code.
$(window).load(function() {
document.title = $("#myid").text(); //not working in FF
});
Here I have used $(window).load(function() because in the #myid I am getting value through another javascript, if I use ready(), its giving me error. so I am first loading the window then start reading value.
Now in IE, after the window loads itself , I am getting the value of document.title,
but for FF its coming as blank.undefined.
Why? any idea or alternate sln.
It might be a rendering/timing issue.
How are you setting the #myid text? Im assuming you are running this code on page load?
Personaly on another note, i like to use the shorthand version of jQuery DOM ready, this might also fix your problem too.
jQuery(function(){
document.title = jQuery("#myid").text();
});
And i would make sure that you call it at the end of the body or ideally in the head tag.
I think it is possible that firefox triggers ready and load at the same time when it loads quickly (localhost, small experiment page with one div, etc.)
Why not put the title setting in the ready function right after getting it? If You put it in a div, You can put it in the title too.
I didn't check this code and it isn't a good way, but maybe it help you...
If your code isn't working in Firefox only, you can check browser by Javascript and execute my code for Firefox only.
<script type="text/javascript">
var timerId = 0;
function checkElement() {
// If don't work: try .html() or $("#myid").text() != undefined or smth like this
if($("#myid").text()) {
document.title = $("#myid").text();
clearInterval(timerId);
}
}
$(document).ready(function() {
timerId = setInterval('checkElement()', 500);
});
</script>