Class Mixins: TypePoliciesMixin

Optional mixin which lets you declare type policies for a component's query.

import { ApolloQueryElement } from '@apollo-elements/interfaces';
import { TypePoliciesMixin } from '@apollo-elements/mixins/type-policies-mixin';

export class HelloQueryElement extends TypePoliciesMixin(ApolloQueryElement) {
  typePolicies = {
    Greeting: {
      fields: {
        name(next) { return next ?? 'friend'; },
        greeting(next) { return next ?? 'friend'; },
      },
    },
  }
}

Lazily adds TypePolicies to the Apollo client when the element connects to the DOM, from the element's typePolicies instance property.

Signature

B

Properties

TypePolicies | undefined

Exports

import { TypePoliciesMixin } from '@apollo-elements/mixins/type-policies-mixin';