[JavaScript知识库]vue报错：You may have an infinite update loop in a component render function.

原代码

<div
  class="holiday"
  v-if="isHoliday(data.day)"
  :holidayName="holidayName"
>
  {{ holidayName }}
</div>

<script>
export default{
  data() {
    holidays,        //holidays是从外部导入的数组
    holidayName: ''
  }，
  methods: {
    isHoliday(day) {
      for (const item of holidays.days) {
        if (item.date === day && item.isOffDay) {
          this.holidayName = item.name
          return true
        }
      }
      return false
    }
  }
}
</script>

原因分析

查找相关资料发现是因为在v-for循环中修改了data中的holidayName属性，导致死循环

解决方案

直接把holidayName作为返回值，不另外设置变量

修改后的代码

<div class="holiday" v-if="isHoliday(data.day)">
  {{ isHoliday(data.day) }}
</div>

<script>
export default{
  data() {
    holidays,        //holidays是从外部导入的数组
  }，
  methods: {
    isHoliday(day) {
      for (const item of holidays.days) {
        if (item.date === day && item.isOffDay) {
          return item.name
        }
      }
      return false
    }
  }
}
</script>