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本篇文章给大家介绍一下JavaScript中将元素添加到数组开头的3种方法。有一定的参考价值，有需要的朋友可以参考一下，希望对大家有所帮助。 
今天，我们来一起学习一下如何把元素添加到数组的开头。 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"] 原文地址：https://codingnconcepts.com/javascript/how-to-add-element-at-beggining-of-javascript-array/ 作者：Orkhan Jafarov 译文地址：https://segmentfault.com/a/1190000039129785
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