10_vue库中的正则表达式_06.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
  </head>
  <body>  
<script>
  // vue源码
  // Browser environment sniffing
  var inBrowser = typeof window !== 'undefined';
  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
  var isIE = UA && /msie|trident/.test(UA);
  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
  var isEdge = UA && UA.indexOf('edge/') > 0;
  var isAndroid = UA && UA.indexOf('android') > 0;
  var isIOS = UA && /iphone|ipad|ipod|ios/.test(UA);
  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;


  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;

</script>
  </body>
</html>