1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <body> 8 <p>typeof操作符返回变量或者表达式的类型</p> 9 <p id="demo"></p> 10 <script> 11 document.getElementById("demo").innerHTML= 12 typeof "john"+"<br />"+ 13 typeof "3.14"+"<br />"+ 14 typeof false+"<br />"+ 15 typeof [1,2,3,4]+"<br />"+ 16 typeof{name:‘ john‘,age:34}; 17 18 </script> 19 </body> 20 </html>
原文：http://www.cnblogs.com/zzzzw/p/4598381.html