Uncaught DONException: Failed to execute ‘atob‘ on “window ‘: The string to be decoded is not carrec

在console出现了标题这段报错，原因是编码的字符串中含有“-”或者“_”。解决办法如下：

// 将上面这段改为下面这段代码
//var bstr = atob(str);
var bstr = decodeURIComponent(escape(atob(str)));