so-example | StackOverflow structure utilization | Database library

There are many mat-form-field elements in our application. Some of them contain MatSelect dropdowns, but most of them contain input[type=text] elements with matInput attribute.

I have a directive ClearButtonDirective with very general selector: 'mat-form-field' - that's intentional, so that it modifies all mat-form-fields. The directive inserts a "clear button" into all mat-form-field elements, which clears the value of the input element when clicked, and it only appears when there's some value in the text field.

I have two issues, both of which are related to the fact that I don't know how to find the input element with @ViewChild or @ContentChild decorators (to be honest I'm not yet sure what's the difference between these two).

1. In onClearClick() the value is cleared (using MatFormFieldControl child), but I also want to focus the input field after that - how? I need the reference to it...
2. I only want the directive to act (insert clear buttons) on those mat-form-fields which contain input[matInput], but not others, such as those that contain mat-select - how? Again, for this I need to be able to detect/find the input[matInput] child.

I don't want to modify existing templates to achieve this, so I can't add any element references or CSS classes.

Working example on StackBlitz - the first three boxes are mat-form-fields with matInput, the 4th one contains mat-select.

Thank you! ❤

clear-button.directive.ts:

From what I understand, a Web App secured by Keycloak should just forward to the Keycloak login page.

If I just dismiss the challenge, my web app does forward to the Keycloak login page and forwards back after a successful as expected.

How do I prevent the Basic challenge dialog?

My web.xml

Based on the code posted in https://stackoverflow.com/a/51654691 I have been able to apply the highlight, underline and strikeout annotations to text in PDFs. Now I'm trying the conceptually similar squiggly annotation, and it doesn't seem to do anything (the text appears unaltered).

I can't find any examples specifically for this (and in the PDFBox JIRA no relevant issues come up regarding "squiggly"), so I'm stuck on how to use this annotation.

I could post the code I used, but it is essentially the same as the one linked above, except using SUB_TYPE_SQUIGGLY instead of SUB_TYPE_HIGHLIGHT.

Update: This is the code I'm testing this with in its most basic form.

I am attempting to create a webpack loader that converts a file containing a description of API data structures into a set of TypeScript interfaces.

In my concrete case, the file is JSON, but this should be ultimately irrelevant — the file is only a shared source of data describing the interaction between web application backend(s) and frontend(s). In my MCVE below, you can see that the JSON file contains an empty object to underscore how the type and contents of the file do not matter to the problem.

My current attempt reports two errors (I assume the second is caused by the first):

I'm using gob to serialize structs to disk. The struct in question contains an interface field, so the concrete type needs to be registered using gob.Register(...).

The wrinkle here is that the library doing the gob-ing should be ignorant of the concrete type in use. I wanted the serialization to be possible even when callers have defined their own implementations of the interface.

I can successfully encode the data by registering the type on the fly (see trivial example below), but upon trying to re-read that data, gob refuses to accept the un-registered type. Its frustrating, because it feels like all the data is there - why isn't gob just unpacking that as a main.UpperCaseTransformation struct if it's labelled as such?

For instance, if I write: