报错:

相关代码

 watch: {
    detailInfo() {
      this.imagesLength = this.detailInfo.detailImages[0].list.length;
    },
}

分析:watch中detailInfo无数据传入

解决:添加个判断条件,无error

  watch: {
    detailInfo() {
      // this.imagesLength = this.detailInfo.detailImages[0].list.length;
      this.imagesLength =
        this.detailInfo.length > 0
          ? this.detailInfo.detailImages[0].list.length
          : 0;
    },
  },

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