js判断是不是chrome浏览器

 1 <script>
 2     var isChrome = window.navigator.userAgent.indexOf("Chrome");
 3     if(isChrome !== -1){
 4         console.log(111);
 5     }
 6     else{
 7         console.log(222);
 8     }
 9 
10 </script>

1 <script>
2     var isChrome;
3     if(isChrome == window.google && window.chrome){
4         console.log(111);
5     }
6     else{
7         console.log(222);
8     }
9 </script>