slice() 方法返回一个新的数组对象,这一对象是一个由 beginend 决定的原数组的浅拷贝(包括 begin,不包括end)。原始数组不会被改变。

 

const animals = ['ant', 'bison', 'camel', 'duck', 'elephant'];

console.log(animals.slice(2));
// expected output: Array ["camel", "duck", "elephant"]

console.log(animals.slice(2, 4));
// expected output: Array ["camel", "duck"]

console.log(animals.slice(1, 5));
// expected output: Array ["bison", "camel", "duck", "elephant"]