概述

近期在项目中遇到三个问题，一是需要前端根据手机号判断运营商的场景，不考虑虚拟运行商及携号转网的情况，只能通过号段的正则表达式来判断；二是需要前端过滤用户输入内容，不允许emoji表情入库，否则数据库会出现问题;三是时间格式化处理。以下分别是三个问题的处理方法。

运营商判断

const getServiceProvider=(tel)=>{
  const chinaTelecom = /^(133|153|173|177|180|181|189|199)\d{8}$/   //电信
  const chinaUnicom = /^(130|131|132|145|155|156|166|175|176|185|186)\d{8}$/ //联通
  const chinaMobile = /^(134|135|136|137|138|139|147|150|151|152|157|158|159|178|182|183|184|187|188|198)\d{8}$/ //移动
  let result = {
    isMobile: false,
    operator: 'unknown'
  };
  if (chinaTelecom.test(tel)){
    result.isMobile = true;
    result.operator = 'China Telecom';
  } else if (chinaUnicom.test(tel)){
    result.isMobile = true;
    result.operator = 'China Unicom';
  } else if (chinaMobile.test(tel)){
    result.isMobile = true;
    result.operator = 'China Mobile';
  }
  return result;
}

emoji表情过滤

function filterEmoji(name) {
  let str = name.replace(/[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF][\u200D|\uFE0F]|[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF]|[0-9|*|#]\uFE0F\u20E3|[0-9|#]\u20E3|[\u203C-\u3299]\uFE0F\u200D|[\u203C-\u3299]\uFE0F|[\u2122-\u2B55]|\u303D|[\A9|\AE]\u3030|\uA9|\uAE|\u3030/ig, "");
  return str;
}

时间格式化处理

function timeFilter(time){
  let date = time? new Date(time): new Date();
  let month = date.getMonth()<9? `0${date.getMonth()+1}`: (date.getMonth()+1);
  let day = date.getDate()<10? `0${date.getDate()}`: date.getDate();
  let hours = date.getHours()<10?`0${date.getHours()}`:date.getHours();
  let min = date.getMinutes()<10?`0${date.getMinutes()}`:date.getMinutes();
  let sec = date.getSeconds()<10?`0${date.getSeconds()}`:date.getSeconds();
  return date.getFullYear()+'-'+month+'-'+day+ " " +hours+':'+min+':'+sec;
}