这个问题已经在这里有一个答案：

• Javascript Array: get 'range' of items 4个回答
• split an array into two based on a index in javascript 6个回答

你是什​​么后拼接（）和分裂（）。我添加了一个演示给你如下：

var arr = ["dog", "cat", "fish", "snake", "elephant"];

// Array.splice() will take everything at / after the index you specify
console.log(arr.slice(1)); // ['cat','fish','snake','elephant']

// array.splice will show everything located on or between the index you specify.
console.log(arr.splice(1,3)); // ['cat', 'fish', 'snake']

在一个阵列到另一个项目创建从一个数据项变量[复制]

var arr = ["dog", "cat", "fish", "snake", "elephant"];

// Array.splice() will take everything at / after the index you specify
console.log(arr.slice(1)); // ['cat','fish','snake','elephant']

// array.splice will show everything located on or between the index you specify.
console.log(arr.splice(1,3)); // ['cat', 'fish', 'snake']