<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>数组复制</title> </head> <body> <script type="text/javascript"> var arr1 = [1,3,5,6,7]; var arr2 = arr1.concat([]); arr2.push(10,50); alert(arr2); alert(arr1); </script> </body> </html>