SelectionList | Simple single-selection or multiple-selection checklist | Form library

I am getting the following error when, from the list view, I try to access the detail view.

Error screenshot

The odd thing is that some of the detail views work, some not, and I do not understand where is the problem. For example, here's the detail view of the organisation with pk=1

organisation detail view

Organisation model

I have a loop that looks like this:

In a Selenium test of my homepage I ran into the following problem:

I have a number of buttons on the page. When clicking one of them a selections list is populated with a number of options via a javascript function. After clicking one of the buttons the selection list can look like this:

React will re-render if the state is changed. Then why the following situation cannot be re-render?

Base on the program behavior, I found that

1. when state change, if the state is use directly in the component, it will be re-rendered.
2. when state change, if the state is use as props in child component, it will not be re-rendered.
3. how can I directly re-render that child component?

The following program is come from my code with some modification. Update: SandBox This is the code i created in sandbox, I have try to simulate my real situation

I have the following javascript code. The code grabs the text from all containers with a "selected-text" class and adds them to the textarea field of a form.

It works great, however, I need to add a condition so that it will ONLY add the text to the textarea field if the value is NOT equal to "none".

I have the following code wich creates a li tag for each item in the loop:

My problem is that the blue select area is too big and cause of that when I move my cursor at the top text the hover property doesn't work. A text cursor appears there, but a cursor pointer should appear.

I tried to add z-index: -1; and user-select: none; attribute to the text below, but it didn't help.

With below code I extract data from a pdf file using pdftools:

I want to use an angular selection list, but additionally, I'd like the user to be able to add new items to the list. If he has already selected a few, this selection should not get lost.

Usually, I'd add a method in the component to add the element to the data list, and then recreate the MatSelectionList I am binding to the view. But then the current selection is lost.

I've tried variations of this in the component (beware, it's pseudo-code):