Angular DragAndDrop Cannot read property 'children' of null - javascript

I'm trying to implement drag and drop functionality in an application and I found a great example on stackblitz
However; When I download the example and run in from my machiene, I get some weird behaviour. First of all it will only drop the item at the end of the list and secondly if I hover the "drop spot" with the item, I get the following error:
Can someone please help me here, because this example solves om problems if i can get this error fixed.
Thanks in advance.

You can find the solution in the attached blog which contains an example of drag-drop functionality implemented in the angular material table.
Drag-Drop Angular Material Table

Related

Angular Material - data table is not working as expected

I got stuck to this problem for quite sometime.
Need help.
Relatively very new to angular.io and implementing with asp.net mvc. For UI library considering angular material. Other controls seems to be working fine but 'Datatable' seems to be not working as expected.
When Component containing 'Datatable' is tried to load in application, first time it is not getting loaded through angular route. When next time again it is clicked or if we work on any control. Datatable is shown.
I tried to add respective part of code in plunkr at
https://plnkr.co/edit/Lp2l0swFwlDI12a9E2vr?p=preview
but plunkr is not able to run that.
Anybody have any idea what can be problem, you can have look at code from plukr link given above?

Load grid row data into CodeMirror - get CodeMirror reference

I am building a small extjs 5.1 app for personal use, designed to save examples of functions / methods used in my extjs apps.
I've given the most important steps with the help of Navaneeth-Kesavan and Tarabass in this Post
Now I'm struggling to load in CodeMirror editor the grid row data.
After several unsuccessful attempts, I am trying to load the data into a hidden textarea and then get value of this textarea and paste the value (setValue) in CodeMirror.
However, I am not able to get the CodeMirror reference.
I would appreciate suggestions to fix this.
By the way, what better way to do this?
MiFiddle
CodeMirror element can be found as sibling of the textarea element. You can get reference to it by using the following code:
var codeMirrorInstance = textAreaComponent.getEl( ).query('.CodeMirror')[0].CodeMirror;
Please refer below fiddle which I created by editing yours.
https://fiddle.sencha.com/#fiddle/tee

Code to Drag web page/Window by its title bar in angularJS

I am trying to find library/module which can be used to create draggable web page in angular JS. Currently there are modules in angular which does that for drag and drop boxes within the list. Please do share if anyone had caught into similar problem and has found solution.
I'm not sure exactly what you are looking for, but it kind of reads like you're looking for a library that will help you with drag and drop in Angular.
There was a great post on the this topic before on stackoverflow: How to Create simple drag and Drop in angularjs

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 to locate dojo DnD handler?

Yo, I am just picking up an old project that uses dojo 1.0.2. The drag and drop function is half working and my job is to get the other half done.
The problem is I can't even begin to trace the program. There is a DnD table cell with the following attributes:
<td onclick="myclick" copyonly="true" accept="ppDay" dojotype="dojo.dnd.Source" id="src04/08/2011" class="dojoDndContainer">
I test it on the browser and it lets me drag and drop, and I see feedback on the drop destination. But the drop event is not completely implemented, which is why I am on it anyways.
The problem is I can't find where the DnD event handler is defined. Can you give me a hint?
It is implemented in dojo.dnd.Source, which can be found in dojo/dnd/ folder: Container.js, Selector.js, and Source.js.
General DnD documentation can be found in the official docs: http://dojotoolkit.org/reference-guide/dojo/dnd.html — DnD principles changed little since 1.0.2.

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