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How to declare type of event parameter when listen for event #188

Open
@vanminhquangtri

Description

Hello,

I am using mitt 3.0.1 for my Nuxt app (nuxt 3.6.5). I use event-bus to emit/listen for the whole app:

File plugins/event-bus.ts

import mitt from 'mitt';
export default defineNuxtPlugin(() => {
 const emitter = mitt();
 return {
 provide: {
 event: emitter.emit, // Will emit an event
 listen: emitter.on, // Will register a listener for an event
 },
 };
});

I am currently not able to declare event when I listen for event in my components. I have to use type "any" but this break out type safety rules.

$listen('component:display', (event: any) => {
 // here the param I want to declare a specific type rather than type "any"
 // like event: {id?: string; value?: string}
});

I already tried assigned a sepecific type but it throw error:

$listen('component:display', (event:{id?: string; value?: string}) => {
 //
});
ERROR: No overload matches this call.
 Overload 1 of 2, '(type: "*", handler: WildcardHandler<Record<EventType, unknown>>): void', gave the following error.
 Overload 2 of 2, '(type: "component:display", handler: Handler<unknown>): void', gave the following error.ts(2769)

It's now allowed to use flag @ts-ignore in my app so I don't know how to solve this now.
I search on document but it seems no mention about this so I hope to receive any advice on this.
Thank you so much.

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