js中遍历数组和遍历对象都可以用for:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>js中遍历对象和数组</title> </head> <body> <script> //遍历对象 var a={ name:'zain', age:26, height:170, weight:120, job:'web前端工程师' }; for(var i in a){ console.log(i,a[i]); } console.log('--------------------------------------------'); //遍历数组 var arr=['zain','jack','jhon']; for(var i in arr){ console.log(i,arr[i]); } </script> </body> </html>