如何在 JS 中的数组开头添加元素?

发表于 2025-11-05 15:32:14 来源：全栈开发

本文已经过原作者 Orkhan Jafarov 授权翻译。中组开

今天，头添我们来一起学习一下如何把元素添加到元素的加元首个元素。云服务器提供商

1.Array.unshift()

let fruits = ["Apple",中组开 "Banana", "Mango"]; fruits.unshift("Orange"); console.log(fruits); // Prints ["Orange", "Apple", "Banana", "Mango"] fruits.unshift("Guava", "Papaya"); console.log(fruits); // Prints ["Guava", "Papaya", "Orange", "Apple", "Banana", "Mango"]

2.使用展开运算符(...)

var fruits = ["Apple", "Banana", "Mango"]; var moreFruits = ["Orange", ...fruits]; console.log(moreFruits); // Prints ["Orange", "Apple", "Banana", "Mango"] var someoMoreFruits = ["Guava", "Papaya", ...moreFruits]; console.log(someoMoreFruits); // Prints ["Guava", "Papaya", "Orange", "Apple", "Banana", "Mango"] console.log(fruits); // Prints ["Apple", "Banana", "Mango"]

3.使用 Array.concat()

我们还可以使用concat()方法在开头连接两个(或更多)数组。

var fruits = ["Apple",头添 "Banana", "Mango"]; var moreFruits = ["Orange"]; var someoMoreFruits = ["Guava", "Papaya"]; var allFruits = someoMoreFruits.concat(moreFruits, fruits); console.log(allFruits); // Prints ["Guava", "Papaya", "Orange", "Apple", "Banana", "Mango"]

完~我是小智，WordPress模板我要去刷碗了，加元我们下期再见~

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作者：Orkhan Jafarov 译者：前端小智来源: dev

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原文：https://codingnconcepts.com/javascript/how-to-add-element-at-beggining-of-javascript-array/

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