Is there a way to document fields in an interface in TypeScript?

If you want to see it appearing when your mouse is hover in your editor, I suggest you document the interface and use the @field inside the documentation comment.

Alternatively you could use @member maybe that gives a better syntax-highlighting for the doc

/**
 * This is the description of the interface
 *
 * @interface EditDialogField
 * @member {string} label is used for whatever reason
 * @field {string} prop is used for other reason
 */
interface EditDialogField {
  label: string;
  prop: string;
  required?: boolean;
  type: 'input';
  validators?: Validator[];
}

Result inside VSCode

Got it!

interface EditDialogField {
  /** Explain label here */
  label: string;
  /** Explain prop here */
  prop: string;
  required?: boolean;
  type: 'input';
  validators?: Validator[];
}