Effortless Tree Grid Demonstration for Hilla

As someone who is just starting out with TypeScript and has minimal experience with Hilla, I kindly ask for a simple example of a Tree Grid. Please bear with me as I navigate through this learning process.

I had hoped to create something as straightforward as:

export class GroceryView extends View {
  display a lovely tree view of master detail data.
}

However, the examples on Vaadin and Hilla websites quickly became overwhelming...

export class Example extends LitElement {}

Currently, my grid is functioning correctly.

  • I have consulted various documentation sources and GitHub example projects.
  • The basic grid is working fine using the View implementation.
typescriptvaadinhilla

Answer №1

In the Hilla framework, the View class is actually an extension of LitElement. If you come across a documentation example that uses LitElement, you can simply copy the contents of that class into your view and it should function as expected.

One key distinction between View and LitElement is that a View renders its template in the light DOM of the element, while LitElement typically renders its template in the shadow DOM by default. This difference arises from the fact that View implements createRenderRoot() which returns this rather than this.attachShadow().

To get started, you can directly copy-paste the initial example from the documentation to your GroceryView:

A notable observation is that some examples may not include all necessary classes, specifically the DataService and the Person domain object. You can easily retrieve them from the docs repository:

Answer №2

Currently undecided on whether I still need the tree grid. I have successfully managed to show the details list by making a call to the backend using getCareersById() and then creating HTML elements through a loop. I couldn't find any examples of master/detail or tree grids that fetch values from the backend.

    careersRenderer: GridColumnBodyLitRenderer<Consultant> = (item, _model, column) => {
        return html`
        <div class="w-full flex-wrap bg-contrast-5 py-s px-l">
          ${until(getCareersById(item.careers).then(opts => repeat(opts, (career) => html`
              <h5>${career?.title}</h5>
              <p>${career?.description}</p>
            `)))}
        </div>
        `;
      };

https://i.stack.imgur.com/SMmZC.png

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