2024 06 02 typescript error fix and enum declaration guidance in chat support - bizkite-co/handterm GitHub Wiki
original file name: Codeium Chat - YQERNpHJC6KunP9yYGs2v1hrRLVRRSuS.md
summary: The chat conversation involved resolving a TypeScript error related to missing properties in a class constructor and a query about declaring ActionType
as an enum for better usage. I provided solutions for both issues, guiding on how to update the class constructor to include the required property and how to declare ActionType
as an enum for enum-like behavior.
date: 2024-06-02T08:26
Note: This is purely the output of the chat conversation and does not contain any raw data, codebase snippets, etc. used to generate the output.
User at 8:26 am, Jun 2, 2024
Explain problem: Argument of type 'Position' is not assignable to parameter of type 'BaseCharacterProps'. Property 'position' is missing in type 'Position' but required in type 'BaseCharacterProps'.
Codeium at 8:26 am, Jun 2, 2024
The issue "Argument of type 'Position' is not assignable to parameter of type 'BaseCharacterProps'. Property 'position' is missing in type 'Position' but required in type 'BaseCharacterProps'" is occurring because the Zombie4
class is extending BaseCharacter
and the constructor of Zombie4
is missing the required property position
from the BaseCharacterProps
.
To resolve this, you need to make sure that the Zombie4
class constructor initializes the position
property with the provided position
parameter and passes it to the super
call.
Here's how you can update the constructor of the Zombie4
class:
export class Zombie4 extends BaseCharacter {
constructor(context: CanvasRenderingContext2D, actionType: ActionType, position: Position) {
super(context, Zombie4Actions, actionType, { position }); // Ensure position is passed as an object
// Load sprites for different animations
}
}
By passing the position
as an object to the super
call, you ensure that the position
property is correctly initialized in the BaseCharacterProps
.
User at 8:54 am, Jun 2, 2024
Is there a way that I can declare the ActionType
so that I can use it like an enum as well as how I am already using it?
I get an error here:
constructor(props: ITerminalGameProps) {
super(props);
this.state = {
heroAction: ActionType.Run,
heroPosition: { leftX: 75, topY: 20 },
zombieAction: 'Walk',
zombie4Position: { leftX: 30, topY: 0 },
context: null as CanvasRenderingContext2D | null
};
}
I currently declare it like this:
export type Action = {
animation: SpriteAnimation;
dx: number;
dy: number;
continueous: boolean;
};
const ActionType = {
Run: 'Run',
Idle: 'Idle',
Walk: 'Walk',
Jump: 'Jump',
Attack: 'Attack',
Die: 'Die',
Hurt: 'Hurt',
} as const;
export type ActionType = typeof ActionType[keyof typeof ActionType];
Codeium at 8:54 am, Jun 2, 2024
To use ActionType
like an enum, you can change the declaration from a const
object to an actual enum
. This way, you can use ActionType.Run
as you have tried in your constructor, which is the enum syntax.
Here's how you can declare ActionType
as an enum:
export enum ActionType {
Run = 'Run',
Idle = 'Idle',
Walk = 'Walk',
Jump = 'Jump',
Attack = 'Attack',
Die = 'Die',
Hurt = 'Hurt',
}
With this change, ActionType
can be used as both a type and an enum value:
// Now ActionType can be used like an enum
this.state = {
heroAction: ActionType.Run, // This will work with enum declaration
// ...
};
Keep in mind that if you use ActionType
as an enum, it's not a plain object anymore, so you can't use it in the same way as an object (e.g., ActionType['Run']
). Enums in TypeScript are their own special structure that compiles to an object in JavaScript, but they have enhanced autocompletion and refactoring support in editors like VSCode.