TypeScript raises an issue with a Vue component property that has been defined using vue-property-decorator

I have a Vue component with a property defined using a decorator:

import { Component, Vue } from "vue-property-decorator"
@Component({
             props: {
               myId: String,
             },
           })
class TestProp extends Vue {
  myFunction(obj: any) {
    return obj[this.myId] // here tslint complains: "Property 'myId' does not exist on type 'TestProp'."
  }
}

To avoid the type error, I currently use this workaround by converting this to any:

  myFunction(obj: any) {
    return obj[(this as any).myId]
  }

However, this solution is more of a temporary fix than a permanent one.

It seems like the compiler may not be aware of properties defined by the @Component decorator?

Any suggestions or ideas for solving this issue would be greatly appreciated.

Answer №1

If you're looking for a great library to enhance your Vue components, I highly suggest checking out https://github.com/kaorun343/vue-property-decorator

Using this library allows you to easily declare props within your component class.

Here's an example:

import { Vue, Component, Prop } from 'vue-property-decorator'

@Component
class TestProp extends Vue {
  @Prop(String) myId: string!
}

Answer №2

The TypeScript example provided in the repository emphasizes the importance of documenting properties within the component code.

As shown on the page:

// additional declaration is needed
// when you declare some properties in `Component` decorator
import { Component, Vue } from "vue-property-decorator"
@Component({
  props: {
    myId: String,
  },
})
class TestProp extends Vue {

  myId: string;

  myFunction(obj: any) {
    return obj[this.myId] // here tslint complains: "Property 'myId' does not exist on type 'TestProp'."
  }
}

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