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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以上就是详解javascript数组开头添加元素的3种方法的详细内容。