这篇文章主要介绍JavaScript中往数组开头添加新元素的方法有哪些，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
1.Array.unshift()
let fruits = ["Apple", "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", "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"]以上是“JavaScript中往数组开头添加新元素的方法有哪些”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注编程网行业资讯频道！
