Question

我有一个简单的打字稿组件类，需要一个道具：

export default class ColorsPallet extends Vue {
        @Prop({type: String, required: true}) readonly name!: string;
        private readonly view: StorageItem;
        private readonly stored: StorageItem;
        private readonly colors: ColorItems;

        constructor() {
            super();

            this.colors = db.colors[this.name]['items'];
            this.storedColor = new StorageItem(this.name + '-stored-color', localStorage, db.colors[this.name]['default']);
            this.viewColor = new StorageItem(this.name + '-view-color', sessionStorage, this.storedColor.get());
        }
}

我想在另一个打字稿组件类中初始化该类以获得特定的实例变量：

constructor() {
    super();

    const colors = new ColorsPallet();
    console.log(color.$data.viewColor.get());
}

这给了我一个明显的错误：

[Vue warn]: Missing required prop: "name"

(found in <Root>)

所以我将初始化更改为：

const colors = new ColorsPallet({props: ['name']})

这仍然给我带来类型错误，因为我没有真正传递任何东西：

[Vue warn]: Error in data(): "TypeError: Cannot read property 'items' of undefined"

(found in <Root>)

在不同情况下，此代码无需道具即可完美地适合我。但是我无法通过传递道具来解决这个问题。我该怎么办？

编辑：

通过这样的道具也不起作用：

const colors = new ColorsPallet({
  name: 'foo'
})

导致此错误：

TS2345: Argument of type '{ props: { name: string; }; }' is not assignable to parameter of type 'ComponentOptions<Vue, DefaultData<Vue>, DefaultMethods<Vue>, DefaultComputed, PropsDefinition<Record<string, any>>, Record<string, any>>'.   Types of property 'props' are incompatible.     Type '{ name: string; }' is not assignable to type 'string[] | RecordPropsDefinition<Record<string, any>> | undefined'.       Type '{ name: string; }' is not assignable to type 'undefined'.

所需格式的类型：

/**
 * This type should be used when an array of strings is used for a component's `props` value.
 */
export type ThisTypedComponentOptionsWithArrayProps<V extends Vue, Data, Methods, Computed, PropNames extends string> =
  object &
  ComponentOptions<V, DataDef<Data, Record<PropNames, any>, V>, Methods, Computed, PropNames[], Record<PropNames, any>> &
  ThisType<CombinedVueInstance<V, Data, Methods, Computed, Readonly<Record<PropNames, any>>>>;

Answer 1

一种解决方案是设置默认值：

@Prop({type: String, required: true, default: 'foo'}) readonly name!: string;

但是，在上面的示例中，我认为您将需要：

const colors = new ColorsPallet({
  propsData: {
    name: 'foo'
  }
})

将VueJS Prop传递给TypeScript类组件

1 个答案: