<van-col>{{第一个参数|formatVisitTime(第二个参数)}}</van-col>

<van-tag plain :color="item.CreateTime（参数）|formatVisitDate（filters方法）|formatVisitDateColor（filters方法）">{{item.CreateTime|formatVisitDate}}</van-tag>

export const formatVisitTime = (beginTime, finishTime) => {
  if (!beginTime) {
    return "--";
  }
  if (!finishTime) {
    return formatDateTime(beginTime, 'hh:mm:ss')
  }
  beginTime = new Date(beginTime);
  finishTime = new Date(finishTime);
  let mss = Math.abs(beginTime.getTime() - finishTime.getTime());
  let hours = Math.floor(mss / (1000 * 60 * 60));
  let minutes = Math.floor((mss % (1000 * 60 * 60)) / (1000 * 60));
  return hours + "小时" + minutes + "分钟";
}

import format from "@/plugins/format";
@Component({
 filters: {
  formatVisitTime(beginTime, finishTime) {
   return format.formatVisitTime(beginTime, finishTime);
  }
 }
})

// omit other properties
 filters: {
  tryParseJsonString(jsonStr, defaultValue) {
   let ret = defaultValue;
   if (jsonStr) {
    try {
     ret = JSON.parse(jsonStr) || defaultValue;
    } catch (e) {
     console.warn('JSON格式不正确，解析失败', e.message);
    }
   }

   return ret;
  }
 },
// ...

<template>
 <comp :images="li.value | tryParseJsonString([])" />
</template>