How to use JavaScript to determine whether it is a WeChat scan code

This article introduces you to the JS method of judging whether it is a WeChat scan code through code. It is very good. Friends who need it can refer to it.

1. In the userAgent attribute of navagitor, judge whether Contains micromessenger

2. Code

/** 
 * 判断微信扫码 
 */ 
function isWechat() { 
  var ua = navigator.userAgent.toLowerCase(),flag = false; 
  // if(ua.match(/MicroMessenger/i) === "micromessenger"){ 
  if(ua.indexOf("micromessenger") > -1){ 
    flag = true; 
  }else { 
    flag = false; 
  } 
  return flag; 
}

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