Question

我有一个存储在localStorage中的数组。如何删除数组的值，然后再次将其保存在localStorage中？

var cars = ["Saab", "Volvo", "BMW"];
localStorage.setItem("cars", JSON.stringify(cars));

let modifiedCars = JSON.parse(localStorage.getItem("cars")).splice(0, 1)

// How do I remove cars[0] from the array and store it back into localStorage?

Answer 1

localStorage是一个简单的基于字符串的存储。为了删除项目，您需要阅读它（就像以前一样），将其删除（就像您一样）并再次存储：

localStorage.setItem('cars', JSON.stringify(modifiedCars));

Answer 2

我更喜欢使用.filter()删除元素；

var cars = ["Saab", "Volvo", "BMW"];
localStorage.setItem("cars", JSON.stringify(cars));

let modifiedCars = JSON.parse(localStorage.getItem("cars")).filter(el => el!= "Saab")

localStorage.setItem("cars", JSON.stringify(modifiedCars ));

如何从localStorage阵列中删除项目？

2 个答案: