I'm currently endeavoring to integrate SignalR into my Vue project and encountering an issue

Currently, I am working on a project using Vue with TypeScript and I am interested in integrating SignalR. I have thoroughly studied the documentation provided by '@dreamonkey/vue-signalr' on how to utilize SignalR.

import { VueSignalR } from '@dreamonkey/vue-signalr';
import { HubConnectionBuilder } from '@microsoft/signalr';
import { createApp } from 'vue';
import App from './App.vue';

// Setting up the connection
const connection = new HubConnectionBuilder()
  .withUrl('http://localhost:5000/signalr')
  .build();

**createApp(App).use(VueSignalR, { connection }).mount('#app');**

After implementing this code snippet, I encountered an error message:

No overload matches this call.
  Overload 1 of 2, '(plugin: Plugin<[options: VueSignalRConfig]>, options: VueSignalRConfig): App<Element>', gave the following error.
    Argument of type '{ connection: HubConnection; }' is not assignable to parameter of type 'VueSignalRConfig'.
      Type '{ connection: HubConnection; }' is missing the following properties from type 'VueSignalRConfig': autoOffInsideComponentScope, failFn
  Overload 2 of 2, '(plugin: Plugin<[options: VueSignalRConfig]>, options: [options: VueSignalRConfig]): App<Element>', gave the following error.
    Object literal may only specify known properties, and 'connection' does not exist in type '[options: VueSignalRConfig]'.ts(2769)

At present, I am uncertain about the steps needed to rectify this issue.

Answer №1

The structure of the VueSignalRConfig type is outlined as follows:

export interface VueSignalRConfig {
  connection: HubConnection;
  autoOffInsideComponentScope: boolean;
  failFn: (error: any) => void;
}

This type requires all 3 properties to be defined; providing just connection alone will not suffice. To address this, you can either 1) assign values to all properties or 2) Cast it to a specific type or any

createApp(App).use(VueSignalR, { 
       connection,
       autoOffInsideComponentScope: false,       
       failFn: e=> console.log(e) }).mount('#app')

or

createApp(App).use(VueSignalR, { connection } as VueSignalRConfig).mount('#app') // import VueSignalRConfig as type

Using the second option may lead to runtime issues if unassigned properties are accessed or utilized in some way.

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