Getting information from nested div and class in HTML with javascript - javascript

I'm trying to get to the div class="article" nested inside a div called div id="tabs=main from this a HTML-page that looks like this:
pastebin
I have tried something like this but with no result:
var targetAbs = doc.querySelectorAll("article");
Anyone have any tips for me? Not even sure I'm suppose to use this queryselector. I have also tried the getElementsByClassName, but I think since it's nested I can reach it.

doc isn't a standard variable provided by the browser. You are looking for document.
Class selectors begin with a .. "article" is a type selector and will match <article> elements.

As your element has a class of article, you need to use the following code:
doc.querySelectorAll(".article");
You need to place a . in front of the selector when it is referring to a class.

Related

Change innerHTML to id and add div to <p> with querySelectorAll

I'm new to javascript. I'm trying to have my h1 show the title of the document instead (which is also Document by the way). Instead, it recognises 'title' as string and not as an id. I don't know what I'm doing wrong here. I also tried to add my roze div class to by using querySelectorAll, but this also is not working. Who can help me? I'm sure its something simple but I've been trying to understand this for the past 3 days...[][][][]
I've tried to use no '' in ('h1'), ('title') and ('p'). I've tried using . and # before ('h1'), ('title') and ('p'). I've tried removing id from title tag and h1 and have googled for methods but I still can't find an example of the specific method I have to do.
To get an DOM element by its id you should use document.getElementById('title'). To edit its text you should use its textContent property. The title of the docuemnt is stored in document.title.
Try the following markup:
document.getElementById('title').textContent = document.title
<h1 id="title">Dit is h1</h1>

Combe Multiple JS Selectors with jQuery Selector

I am selecting a group of table rows by using the following line of JS:
document.getElementById('tab1_content').contentDocument.documentElement.getElementsByClassName("data1_smaller")
These represent entries in a table of contents. I want to return only those above which also contain the word 'CHAPTER', so I was attempting to use the jQuery :contains() selector to accomplish this and attempted to convert the entire thing into a single jQuery selector; so, to begin with, I tried converting the following invalid line:
document.getElementById('tab1_content').contentDocument.documentElement.getElementsByClassName("data1_smaller").$(":contains('CHAPTER')")
to this:
$("#tab1_content > contentDocument > documentElement > .data1_smaller:contains('CHAPTER')")
The selector above doesn't give an error but it fails to find anything. Does anybody know the correct way to do this?
You can achieve what you want with pure vanilla js just like you tried in the beginning. You just need to do some small adjustments to your code. You can use querySelectorAll() to query all elements matching a selector inside your ID. Something like this should work just by looking at your example, but might need some small adjustments.
[...document.getElementById('tab1_content').querySelectorAll(".data1_smaller")].filter((node) => node.textContent.includes('CHAPTER'))
// Edit, saw in the comments that you're accessing content in an iframe
[...document.getElementById('tab1_content').contentWindow.document.querySelectorAll(".data1_smaller")].filter((node) => node.textContent.includes('CHAPTER'))
I found this solution based on Anurag Srivastava's comments:
$("#tab1_content").contents().find(".data1_smaller:contains('CHAPTER')")
The issue was that I was trying to select things that are inside of an iframe and the the .contentDocument.documentElement that I used to access the iframe in JS has to be changed to .contents() in jQuery in order for it to work.
Neither contentDocument or documentElement are valid HTML tags. Try to select by id or class name.

Why is Inspecting the DOM element showing something diff than using jQuery ID selector in console?

I'm working on displaying a graphic on a website. For some reason, when I inspect the element I see this:
<div id="canvas-daily" style="position:relative;" ng-if="currentMode == 'day'" class="ng-scope"><div class="circle-background"></div></div>
But when I do document.getElementById("canvas-daily") in my console I get a svg graphic inside the parent (canvas-daily) ID div. Why would this be happening and how can I fix/hack into this to append the content that is obviously there?
Edit - this answer has been rendered obsolete by edits the OP made to their question. It has not been deleted yet because of the conversation happening in comments.
To find the DOM element shown in the HTML in your question, you would just use this:
document.getElementById("canvas-daily")
Do NOT include the # in the string you pass to document.getElementById(). That is only used with more generic functions that accept CSS selectors like document.querySelectorAll(). document.getElementById() just takes a plain string that matches the ID you are looking for.

Get a jQuery element for a DOMElement

I know how to do the opposite. Getting a certain DOMElement for a jQuery element is easy. (Use the get() method)
But how can you get a jQuery element for a specific DOMElement?
Unfortunately this DOMElement does not have any attributes like class or id so constructing a selector is not really an option.
Lets say I have this html:
<div class="edit">Abcd<b><i><u>asdasd</u>adasda</i></b>sdfsdf<br>asd</div>
I am in the u-DomElement. How can I get this as a jQuery element?
Is there a smart way to do this?
EDIT:
I wanted to know if there is a gerneral way to do this. Not specific to the code shown above.
Like:
DomElement.toJQuery()
Is there anything like that? I am aware that this might not be possible.
Getting a jQuery object for a DOM object is as simple as jQuery(dom_node) (or $(dom_node)). See http://api.jquery.com/jQuery/
This is commonly used in event handlers, which are given the DOM node as this, so that you will often see $(this)
If you want to get just the Element use the below code. if you wanted to get the HTML of any element you might want to add the .html() tag to either of the examples
var myVar = $('.edit u');
or
var myVar = $(".edit").find("u");
Are you looking for this?
$(".edit").find("u");
hope this is what you are looking for,
$(DomElement)
you want a only 1 specific dom element i suggest you find a way to add an id to that element.
but to get an u element inside a edit class:
$('.edit u');
$('.edit').find('u');

JQuery remove images

I'm curious if anyone knows why this piece of jQuery code doesn't remove the images?
var a = $('#tblMain').clone().remove('img');
The table is being selected. This is trying to take the table on the webpage and export to excel but I do not want the images to export.
Thank you,
Do it like this:
$("#tblMain").clone().find("img").remove();
EDIT: Okay, here's the problem:
selector: A selector expression that
filters the set of matched elements to
be removed.
http://api.jquery.com/remove/
The img in .remove('img') is to filter the set of items in the jquery object, NOT to find elements within the items themselves. In this case, the jquery object contains only one item, the cloned table. Therefore, .remove('img') removes nothing, since the jquery object does not contain any images (only images within items it contains).
I don't know what's happening behind the scenes, but you're referring to some variable called img whilst you most probably just want to select all img elements. In that case, you ought to use a selector as a string:
var a = $('#tblMain').clone().remove('img');
EDIT: .clone.remove does not seem to work indeed. I used this workaround which actually works:
.find('img').each(function() {$(this).remove()});

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