<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>arr_slice</title> </head> <body> <script> // slice，数组切片，原理是在原来的数组基础上复制了一份，再操作。 // 即创建了新的数组，和原来的数组没有关系了。 let arr1 = [1,2,3]; let arr2 = arr1.slice(); console.log('arr1;', arr1); // [1, 2, 3] console.log('arr2;', arr2); // [1, 2, 3] arr1.push(4); console.log('arr1;', arr1); // [1, 2, 3, 4] console.log('arr2;', arr2); // [1, 2, 3] </script> </body> </html> 文章来源: https://blog.csdn.net/weixin_42193179/article/details/88091960