Vue复选框过滤器组件不起作用

问题描述 投票:0回答:1

在单个文件组件中,我创建了一个复选框数组:

    <label 
      v-for="(category, index) in categories" 
      :key="index"
     >
      <input type="checkbox" :value="category.value"
      @change="emitSearchValue">
      <span class="ml-2 text-gray-700 capitalize">{{ category.value }}</span>
    </label>

使用EventBus,我将数据传输到列表组件:

methods: {
    emitSearchValue() {
      EventBus.$emit('checked-value', 'this.checkedCategories')
    }
  }

在列表组件中,我监听EventBus:

created() {
 EventBus.$on('checked-value', (checkedCategories) => {
  this.checkedvalue = checkedCategories;
 })
}

然后我的计算属性如下:

computed: {
 filteredData() {

   return this.blogs.filter(blog =>
   // if there are no checkboxes checked. all values will pass otherwise the category must be included
    !this.checkedCategories.length || this.checkedCategories.includes(blog.category)
   )
  }
},

在控制台中,我得到:

[Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined"

这里是指向sandbox的链接。

这里怎么了?

vuejs2 vue-component event-bus
1个回答
0
投票

将计算出的道具filteredData更改为:

computed: {
    filteredData() {
      if(!this.checkedvalue.length) return this.experiences

      return this.experiences.filter(experience =>
        this.checkedvalue.includes(experience.category)
      );
    }
}
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