代码

function getShareToken(length) {
    var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    var shareToken = '';
  
    for (var i = 0; i < length; i++) {
      var randomIndex = Math.floor(Math.random() * characters.length);
      var randomChar = characters.charAt(randomIndex);
      shareToken += randomChar;
    }
  
    return shareToken;
  }
  

调用

console.log("share token====", getShareToken(8))

效果