Guide on utilizing TypeScript object to display a partial view

Currently, I am handling button rendering using an enum to determine the type and then displaying different HTML based on that. This is how it's set up:

export interface control {
  type: controlType;
}

export enum controlType {
  button, 
  switch,
  select
}

Then, I use it like this:

<!--- ko: if: $data.type === 0 -->
  PUT CODE HERE
<!-- /ko -->

In an attempt to improve optimization, I started exploring using an object and rendering the code view from a separate file. However, I'm facing difficulties in implementing this approach and would appreciate any assistance. Here's what I have tried so far:

export interface control {
  type: {
    button: 'folder/button.html',
    switch: 'folder/switch.html',
    select: 'folder/select.html'
  }
}

I thought I could simply do something like this:

<!-- ko compose: { view: $data.type } --> <!-- /ko -->

Unfortunately, that method isn't working as expected, and I'm currently stuck.

Answer №1

interface serves the purpose of verifying your types during the build process. The objects like button: 'folder/button.html', within the type object specified in the interface are not available at runtime unless you assign $data.type with the exact same object as type in your interface.

Instead, you can define controlType as a string enum:

export enum controlType {
  button = 'folder/button.html', 
  switch = 'folder/switch.html',
  select = 'folder/select.html'
}

export interface control {
  type: controlType;
}

Now, you can create an object of type control as follows:

const $data: control = {
  type: controlType.button
}

This restricts the $data.type to have only 3 specific values and enables you to use it in this manner:

<!-- ko compose: { view: $data.type } --> <!-- /ko -->

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