用正则表达式获取京东链接中的skuId

let str1 = 'https://item.m.jd.com/product/71183244921.html?utm_user=plusmember&gx=RnAokjsMIFuEmscXr4RxEfMCoA&gxd=RnAoxWFZOTLQyMsd_YwjCBHpQ9I7NNE&ad_od=share&utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=CopyURL'
reg1 = RegExp(/item.m.jd.com/)
if(str1.match(reg1)){
  console.log('包含')
}else{
  console.log('不包含')
}

str1 = str1.match(/product\/(\S*).html/)[1]
console.log(str1)

let str2 = 'https://item.jd.com/71183244921.html?utm_user=plusmember&gx=RnAokjsMIFuEmscXr4RxEfMCoA&gxd=RnAoxWFZOTLQyMsd_YwjCBHpQ9I7NNE&ad_od=share&utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=CopyURL'
reg2 = RegExp(/item.jd.com/)
if(str2.match(reg2)){
  console.log('包含')
}else{
  console.log('不包含')
}
str2 = str2.match(/.com\/(\S*).html/)[1]
console.log(str2)