Ways to resolve the issue: The property 'X' is not recognized on the '{ object }' data type

Just getting started with vuejs and encountering an error in my vue file

Issue: Property 'ClientsSrv' is not recognized on type '{ name: string; props: {}; data(): { ClientsSrv: ClientsService | null; ClientsList: ClientsModel[] | null; IsReady: boolean; }; mounted(): Promise; }'

<script lang="ts">
import ClientsService from "@/Services/Clients/ClientsService"; 
import IClientsModel from  "@/Models/ClientsModel"; 
export default {
  name: "Clients",
  props: {
    
  },
  data() : {ClientsSrv:ClientsService|null;ClientsList:IClientsModel[]|null; IsReady:boolean}  {
    
    return {
      ClientsSrv: null,
      ClientsList: null,
      IsReady: false,
    }; 
  },
 
  async mounted() : Promise<void> {
    
    this.ClientsSrv = new ClientsService();
    this.ClientsList = await this.ClientsSrv.GetClients();
    
    if(this.ClientsList!=null) 
    {
      this.IsReady = true;
      }
  },
};
</script>

Any suggestions or assistance would be greatly appreciated. Thanks!

typescriptvue.jsvuejs3

Answer №1

For TypeScript to accurately infer types within Vue component options, it is essential to define components using the defineComponent global method. source

<script lang="ts">
import { defineComponent } from 'vue'

export default defineComponent({
  // enabling type inference
})
</script>

It is advisable to infer types on reactive data in the following manner:

data() {
    return {
      ClientsSrv: null as ClientsService | null,
      ClientsList: null as IClientsModel[] | null,
      IsReady: false as boolean,
    };
  }

Answer №2

In order to utilize type inference, it is important to define your component using the defineComponent method like so:

<script lang="ts">
import ClientsService from "@/Services/Clients/ClientsService"; 
import IClientsModel from  "@/Models/ClientsModel"; 

import {defineComponent} from 'vue'

export default defineComponent({
  ....
});
</script>

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