如何正确在vue + ts中注册组件?

时间:2019-09-28 16:58:28

标签: javascript typescript vue.js vue-component

我有这个代码:
App.vue

<template>
  <v-container>
    <div>
      <schedule-table
      v-if = "schedule.length > 0"
      :exercises="schedule[0].exercises"
      />
    </div>
  </v-container>
</template>
<script lang="ts">

import Vue from "vue";
import { Component } from "vue-property-decorator";
import ScheduleTable from '@/components/ScheduleTable.vue'

@Component({
  components: {
    ScheduleTable,
  }
})
</script>

ScheduleTable.vue

<template>
  <v-container>
    <schedule-week
    :exercises="exercises"
    />
  </v-container>
</template>
<script lang="ts">
import Vue from "vue";
import { Component, Prop } from "vue-property-decorator";
import { IExercise } from "@/interfaces"
import ScheduleWeek from '@/components/ScheduleWeek.vue'

@Component({
  name: 'ScheduleWeek',
  components: {
    ScheduleWeek,
  }
})

@Component
export default class ScheduleTable extends Vue {
  @Prop( {required: true, type: Array } ) readonly exercises!: IExercise;
}
</script>

ScheduleWeek.vue

<template>
  <v-container
  :ex="exercises"
  >
    here is tables (but this tables dosn't show and any other text dosn't show)
  </v-container>
</template>
<script lang="ts">
import Vue from "vue";
import { Component, Prop } from "vue-property-decorator";
import { IExercise } from "@/interfaces"


@Component
export default class ScheduleWeek extends Vue {
  @Prop( {required: true, type: Array } ) readonly exercises!: IExercise;
}
</script>

并发出警告:

  

未知的自定义元素:-您是否注册了   组件正确吗?对于递归组件,请确保提供   “名称”选项。

如何解决此问题?如何正确注册组件?

2 个答案:

答案 0 :(得分:2)

使用打字稿时,有多种方法可以声明vue组件。基于类的SFC方法(您正在使用的一种)需要遵循略有不同的语法。您在计划周组件中两次使用了打字稿decorator

App.vue

<v-container>
    <div>
      <schedule-table
      v-if = "schedule.length > 0"
      :exercises="schedule[0].exercises"
      />
    </div>
  </v-container>
</template>
<script lang="ts">

import { Component, Vue } from "vue-property-decorator"; // you can import vue here
import ScheduleTable from '@/components/ScheduleTable.vue'

@Component({
  components: {
    ScheduleTable,
  }
})
export default class App extends Vue {} // the @Component() decorator needs to be followed by the exported class

相应地,您的其他组件:

ScheduleTable.vue

<template>
  <v-container>
    <schedule-week
    :exercises="exercises"
    />
  </v-container>
</template>
<script lang="ts">
import { Component, Vue, Prop } from "vue-property-decorator"; // see above
import { IExercise } from "@/interfaces"
import ScheduleWeek from '@/components/ScheduleWeek.vue'

@Component({
  name: 'ScheduleWeek',
  components: {
    ScheduleWeek,
  }
}) // >>>don't use the decorator twice<<<
export default class ScheduleTable extends Vue {
  @Prop( {required: true, type: Array } ) readonly exercises!: IExercise;
}
</script>

ScheduleWeek.vue

<template>
  <v-container
  :ex="exercises"
  >
    here is tables (but this tables dosn't show and any other text dosn't show)
  </v-container>
</template>
<script lang="ts">
import { Component, Vue, Prop } from "vue-property-decorator"; // see above
import { IExercise } from "@/interfaces"


@Component
export default class ScheduleWeek extends Vue {
  @Prop( {required: true, type: Array } ) readonly exercises!: IExercise;
}
</script>

编辑:

摘自官方TypeScript文档:

  

随着TypeScript和ES6中类的引入,现在存在某些情况,这些情况需要附加功能来支持注释或修改类和类成员。装饰器提供了一种为类声明和成员添加注释和元编程语法的方法。

装饰器基本上是TypeScript(JavaScript)函数,用于向以下class(您的组件)或类成员添加附加信息。这也意味着装饰者不能独自站立。 @Component()装饰器将Object作为参数,按原样翻译为组件选项。

答案 1 :(得分:0)

TL; DR

要在SubOne中注册组件SubTwoMyComponent,请将其传递给@Component装饰器:

import { Component, Vue } from "vue-property-decorator";

@Component({
  components: {
    SubOne,
    SubTwo,
  }
}) 
export default class MyComponent extends Vue {
  …
}

并确保您还像这样装饰SubComponents;

import { Component, Vue } from "vue-property-decorator";

@Component
export default class SubOne extends Vue {
  …
}

@MarcRo的答案错误

设置和产生的错误

在组件ScheduleTable.vue中,装饰器@Component将参数name设置为将要导入的组件。这将导致对该组件的递归调用,从而导致错误。

修复

设置name: 'ScheduleTable'-甚至删除它。似乎使用了类名(这就是我们正在做的事情)。

在旁边

我找不到有关可以实际传递给装饰器的文档,但是在App.vuehere中@MarcRo的答案中使用了该文档。 (评论中的链接似乎很旧)。

我没有足够的声誉来发表评论,并且固定的编辑被拒绝,所以对多余的帖子感到抱歉。

感谢@MarcRo教我如何解决此错误以及经过很长一段时间后解决了递归错误;)