Vue.js with TypeScript: The property 'xxx' is not found on the type 'never'

I have a computed method that I am trying to execute:

get dronesFiltered(){
        const filtered = this.drones.filter((drone) => {
            return drone.id.toString().indexOf(this.filterId) > -1 && drone.name.toLowerCase().toString().indexOf(this.filterName.toLowerCase()) > -1 && drone.status.toLowerCase().toString().indexOf(this.selectedStatus.toLowerCase()) > -1 && this.statusFly(drone.fly, drone.status).indexOf(this.selectedCurrentFly) > -1;
        });
        return filtered;
    }

The method runs successfully but displays the following errors:

Property 'status' does not exist on type 'never'

This error occurs for status, id, name, fly (every field I'm trying to filter). How can I resolve this issue?

Below is my component code snippet:

@Component({})
export default class List extends Vue {

    drones = []
    selectedStatus = ''
    selectedCurrentFly = ''
    filterId = ''
    filterName = ''

    mounted(){
        this.listDrones(1);
    }

get dronesFiltered(){
        const filtered = this.drones.filter((drone) => {
            return drone.id.toString().indexOf(this.filterId) > -1 && drone.name.toLowerCase().toString().indexOf(this.filterName.toLowerCase()) > -1 && drone.status.toLowerCase().toString().indexOf(this.selectedStatus.toLowerCase()) > -1 && this.statusFly(drone.fly, drone.status).indexOf(this.selectedCurrentFly) > -1 ;
        });
        return filtered;
    }

public async listDrones(current: number) {
      try {
        const res = await dronesController.getDronesWithLimit(current);
        const resTotal = await dronesController.getDrones();
        this.totalRows = resTotal.data.length;
        this.drones = res.data;
      } catch (err) {
        console.log(err);
      }
    }
}

Answer №1

To provide some clarification and insights ;)

Considering that --strictNullChecks is typically used in conjunction with --noImplicitAny, it may seem unnecessary to broaden the type of empty array literals from never[] to any[] only to encounter an implicit any error immediately after widening. It would make more sense to maintain the more specific never[] type and require programmers to specify a type if the array will be modified.

You can read more about this topic here: TypeScript GitHub pull #8944

Answer №2

After some trial and error, I finally found the solution to my issue by including the following code in my 'drones' variable (although the reason behind this fix is still unclear to me):

drones: any[] = []

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