<script>
var ua= window.navigator.userAgent.toLowerCase();
if( (ua.match(/MicroMessenger/i) == ‘micromessenger‘) && (ua.match(/wxwork/i) == ‘wxwork‘) ){
alert("企业微信客户端");
}else if( ua.match(/micromessenger/i) == ‘micromessenger‘ ){
alert("微信客户端");
}
</script>
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原文：https://blog.csdn.net/hrf368246980/article/details/83055671