Append div to end of document with jQuery? - javascript

I would like to write a function using jQuery to append a div to the end of a web page. I would like to be able to use the function on many different pages.
I've written the following code, but it doesn't work:
$(document).append('<div id="helloDiv"></div>');
$('#helloDiv').html('hello'); // does nothing
$('#helloDiv').css('top','100') // throws an error
How do I fix this?

It is meaningless to append to the document. Append to the document's body node instead, since this is where all the visible content is:
$(document.body).append('<div id="helloDiv"></div>');

If you want it to be at the end of the body, why not use:
$('body').append('<div id="helloDiv"></div>');
$('#helloDiv').html('hello');
$('#helloDiv').css('top', 100);
http://jsfiddle.net/ptuxX/
However, just .css('top', 100) does not do much unless you set the position to absolute.

Try:
$('body').append('<div id="helloDiv"></div>');
$('#helloDiv').html('hello');
$('#helloDiv').css('top', '100');
Or just add the content and it's css before adding the div.
var $newdiv = '<div id="helloDiv">hello</div>';
$('body').append($newdiv);

Related

Add Span to Label ID

I'm trying to add a span to a label for which I don't have access to the HTML as it's output from RSForms Pro. I would like to add a tooltip span to individual labels so when the person rolls their mouse over, they get some information.
Here is what the code looks like:
<p class="rsformVerticalClear"><input name="form[Services_DM][]" type="checkbox" value="Death Records Retrieval/Search" id="Services_DM0"><label for="Services_DM0">Death Records Retrieval/Search</label></p>
The next option has the class Services_DM1 and so forth.
How do I go about adding a span to "Death Records Retrieval/Search" without having access to the actual code? Is there a way to inject it?
How are you inserting the code into your page? Anything embedded (such as an Iframe) will be barred from being manipulated from (or, IIRC, accessed by) your javascript due to XSS concerns.
Assuming your html and the loaded html are rendered into the same document, you'd want to use the HTML DOM functions to manipulate the html post load. This function should do what you want:
function addToolTip(elementid, content, classname) {
var theelement=document.getElementById(elementid);
var thetooltip=document.createElement('span');
var thetext = document.createTextNode(content);
thetooltip.appendChild(thetext);
thetooltip.setAttribute('class',classname);
theelement.appendChild(thetooltip);
}
To generate a tooltip, just call addToolTip with your label's element, whatever content text you'd like to see within the tooltip, and a css class (I figured you may want this for styling).
You can target all the labels with class starting from "Services_DM" and append a span to them:
try this jQuery sample snippet.
var $span = $('<span>My span contents here </span>');
$('label[class^="Services_DM"]').each(function(index,item){
$(this).append($span);
});
The above code is not tested, for reference purpose only!

Displaying and highlighting a particular line in HTML

I am trying to implement a webpage which should have expected to have the following properties.
The HTML page contains many lines of text (thousands of lines), basically a log file.
Upon a desired action, line which is related to the action should be highlighted and shown . (exactly the way that would happen if you click on corresponding source button of a logged variable in chrome inspect element.)
This seems to be very basic but I couldn't figure out how! May be I am missing some literary terms.
Thank you.
You need to do a few things:
$("li").each(function(i, element) {
var li = $(element);
if (li.text() == "Orange") {
li.addClass("selected");
// Get position of selected element relative to top of document
var position = li.offset().top;
// Get the height of the window
var windowHeight = $(window).height();
// Scroll to and center the selected element in the viewport
$("body").scrollTop(position - (windowHeight/2));
}
});
See DEMO.
There are many ways to go about this. But is there any class tags in the logged source or is just one large text block?
If there are class or id tags on the html you can use javascript or jquery to do this.
document.getElementById('myText');
or in jquery
var element = $("#myText");
//example css changes
element.css("position","center");
element.css("color","red");
Then change the css style on those html elements.

Converting html page represented as text to dom object

I have a text that represents some page. I need to convert this text to dom object, extract body element and append it to my dom.
I have used following code to convert text and extract body element:
$('body', $(text)).length
and:
$(text).filter('body').length
In both cases it returns 0...
To test: http://jsfiddle.net/wEyvr/1/
jQuery is parsing whole HTML in a non-standard way, so $(html) doesn't work as expected.
You can extract the content of the body tag using regexp and work from there:
// get the content of the body tags
var body = $(text.match(/<body[\s\S]*?>([\s\S]*?)<\/body>/i)[1]);
// append the content to our DOM
body.appendTo('body');
// bonus - to be able to fully use find -> we need to add single parent
var findBody = $("<body />").html(body.clone());
// now we are able to use selectors and have fun
findBody.find("div.cls").appendTo('body');
HERE is the working code.
EDIT: Changed the code to show both direct append and also using selectors.
Something like this:
var ifr = $("<iframe>"),
doc = ifr.appendTo("body")[0].contentWindow.document,
bodyLength;
doc.open();
doc.write(text);
doc.close();
bodyLength = ifr.contents().find("body").length;
ifr.remove();
alert(bodyLength);
http://jsfiddle.net/wEyvr/2/

Extracting text from a HTML to be stored as a JS variable, then to be added to a separate HTML's element

Alrite, I have seen other Questions with similar titles but they don't do exactly what Im asking.
I have 2 x HTML documents, one containing my page, one containing a element with a paragraph of text in it. As-well as a separate .js file
what I want to do is extract this text, store it as a JS variable and then use jQuery to edit the contents of an element within the main page. This is the conclusion I came to but it didnt work as expected, im not sure if it is me making a syntax error or if i am using the wrong code completely:
$(document).ready(function(){
var c1=(#homec.substring(0))
// #homec is the container of the text i need
$(".nav_btn #1").click(function(c1){
$(".pcontent span p") .html(+c1)}
);
});
i know +c1 is most probably wrong, but i have been struggling to find the syntax on this one. thankyou in advance :D
var c1=(#homec.substring(0)) will throw an error because #homec is not a valid variable name, is undefined, and does not have a property function called substring. To get the html of an element with an id of homec, use the html method:
var c1 = $("#homec").html();
c1 should not be an argument of the click function because it is defined in the parent scope. +c1 is unnecessary because you do not need to coerce c1 to a number.
If you are trying to add content to the end of the paragraph, use the append method:
$(".pcontent span p").append(c1)
That means you should use this code instead:
$(document).ready(function() {
var c1 = $("#homec").html();
$(".nav_btn #1").click(function() {
$(".pcontent span p").append(c1)
});
});
P.S. Numbers are not valid ID attributes in HTML. Browsers support it, so it won't make anything go awry, but your pages won't validate.
Try this:
$(".nav_btn #1").click(function(c1){
var para = $(".pcontent span p");
para.html(para.html() + c1);
});
The JQuery text() function will allow you to get the combined text contents of each element in the set of matched elements, including their descendants. You can then use the text(value) function to set the text content of your target paragraph element. Something like this should suffice:
$(document).ready(function() {
var c1 = $("homec").text();
$(".nav_btn #1").click(function() {
$(".pcontent span p").text(c1);
});
});
See the JQuery documentation for more details on the text() function. If you need to capture the full structure of the other document, then try the html() function instead.

Use getElementById() on non-current HTML document

Essentially, I want to pull text within a div tag from a document on my server to place it in the current document. To explain the reason: I want to pull a headline from a "news article" to use it as the text for a link to that article.
For example, within the target HTML is the tag:
<div id='news-header'>Big Day in Wonderland</div>
So in my current document I want to use javascript to set the text within my anchor tags to that headline, i.e.:
<a href='index.php?link=to_page'>Big Day in Wonderland</a>
I'm having trouble figuring out how to access the non-current document in JS.
Thanks in advance for your help.
ADDED: Firefox style issue (see comment below).
I'm not sure where you're getting your HTML but, assuming you already have it in a string, you could create a document of your own, stuff your HTML into it, and then use the standard getElementById to pull out the piece you want. For example:
var doc = document.implementation.createDocument('http://www.w3.org/1999/xhtml', 'html', null);
doc.documentElement.innerHTML = '<body><div>Nonsense</div><div id="news-header">Big Day in Wonderland</div><p>pancakes</p></body>';
var h = doc.getElementById('news-header');
// And now use `h` like any other DOM object.
Live version: http://jsfiddle.net/ambiguous/ZZq2z/1/
Normally, I would try to solve an issue only with the tools specified by the user; but if you are using javascript, there really is no good reason not to just use jQuery.
<a id='mylink' href='url_of_new_article' linked_div='id_of_title'></a>
$(function() {
var a = $('#mylink');
a.load(a.attr('href') + ' #' + a.attr('linked_div'));
});
That little function up there can help you update all your link's text dynamically. If you have more than one, you can just put it in a $('a').each() loop and call it a day.
update to support multiple links on condition:
$(function() {
$('a[linked_div]').each(function() {
var a = $(this);
a.load(a.attr('href') + ' #' + a.attr('linked_div'));
});
});
The selector makes sure that only the links with the existence of the attribute 'linked_div' will be processed.
You need to pull the content of the remote document into the current DOM, as QuentinUK mentioned. I'd recommend something like jQuery's .load() method

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