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📜  javascript 将新的数组元素添加到数组的开头 - Javascript 代码示例

📅  最后修改于: 2022-03-11 15:04:30.128000             🧑  作者: Mango

代码示例2
// Use unshift method if you don't mind mutating issue
// If you want to avoid mutating issue
const array = [3, 2, 1]

const newFirstElement = 4

const newArray = [newFirstElement].concat(array) // [ 4, 3, 2, 1 ]

console.log(newArray);