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Fullcalendar.js disabling custom days from agendaWeek (custom hiddenDays)

I am using fullcalendar.js plugin and I believe it is great and fills my needs, except one feature that I need. This feature is to disable (better - hide, not display at all) arbitrary (custom) days from (at least) agendaWeek view. Now, I can only disable specific weekDays with hiddenDays option.
During research about it, I have only found this topic:
Setting Custom hiddenDays in Full Calendar
Which does not help me (it does not work, only disables (not "deletes, hides") days in month view.
Similar feature has been requested, but no response. https://github.com/fullcalendar/fullcalendar/issues/3130
So my question is, is there any way to achieve this? Either by hacking the JS code, or somehow modifying CSS with display: none? If so, which parts of the code I should look at and how, that could be modified to achieve my goal?
If anyone would have any idea I would be very grateful. Also I believe this feature could be useful for more people.
Thank you.

Add View Source Code Button

Is there any way to add view source code button to quilljs editor?
I looked into the documentation and no explanation for this or should be developed by the developer.
Any help will be appreciated.
Thanks

I haven't extensively looked at the api but I think you are best off rolling your own button. It seems quill.js allows you to add your own custom toolbars to the documentation. I would look at this page to do that. http://quilljs.com/docs/modules/toolbar/
You can add an on click on the button that simply gets the editor's html and puts it in an element using this. var html = editor.getHTML(); http://quilljs.com/docs/api/#quillprototypegethtml
Sorry to be brief, but if you need more info on how you can comment below.

Open Javascript code in editor on click

I am trying to create an interactive tutorial for learning an API. I've been googling my options for an entire day now. I came across ace, code mirror etc. but I'm not sure how I can use them in my case.
What I wish to do is that when the user clicks a button, a javascript code linked to it should open up in an editor on the same webpage. This would aid the users to see how the code is working and give them scope to modify and learn.
I know its not a constructive question but any help is appreciated! Thanks!

you can just wantch here how it is done
They made it with knockout MVVM but you can use angular or anything else you like.

I used tags to store my code and displayed it using codemirror's setValue property mentioned by #georg.

How do I create a Graphical Timeline using javascript

I am trying to create a timeline as per the screenshot attached. Can anybody give me pointers how to go about creating this kind of component using javascript/jquery?
Note: Kindly ignore the dates mismatch!
Thanks!

Timelinejs plugin will be helpful:
https://github.com/NUKnightLab/TimelineJS

Create a Custom Control using Javascript

I've been trying to do some research into this, but I haven't yet found anything related to this, so I've come here in hopes that someone might be able to point me in the right direction.
Is there any way at all that we can create our own HTML Elements?
I've seen a Custom ComboBox that was created using Javascript months back, but cannot find it anymore.
Basically, I'd like to create my own 'Control', that I can use for my pages. Maybe something that can be just 'plugged in' (although not a requirement). Any thoughts/ideas/advice/links?
Any help is really appreciated. Thank you!

If you want to write a JQuery plug-in but don't know where to start, have a look at this site: http://stefangabos.ro/jquery/jquery-plugin-boilerplate
He's written a boilerplate code for a jquery plug-in, with plenty of comments explaining what to do and how to expand it. It should make a good starting point for you.