Question

我正在制作完全离线的HTML5网络应用。

在我的代码的特定部分中，我需要向JavaScript Array对象添加一行数据，并将更新后的版本保存回localStorage。

以下是代码：

var data = localStorage.getItem("cars");

//Trouble in this line.
data.goals.push(["name": "merscede", "model": "bmw", "noofdays": "10", "active": "yes"]); 

localStorage.setItem("goals",data);

这是我在localStorage中存储的源代码的不同部分的值：

var data = '{"goals":[{"name":"rocky","model":"old","noofdays":"50","active":"no"}]}';
localStorage.setItem("goals",data);

我已经进行了广泛的故障排除，事实证明只有我特别注明的那条线路才有问题。

有什么问题？我该怎么办？

Answer 1

您需要这样做：

var data = '{"goals":[{"name":"rocky","model":"old","noofdays":"50","active":"no"}]}';
localStorage.setItem("goals",data);

// You get a string when you do "getItem"
var goalsStr = localStorage.getItem("goals");

// You need to parse it.
var goalsObj = JSON.parse(goalsStr);
goalsObj.goals.push({"name": "merscede", "model": "bmw", "noofdays": "10", "active": "yes"});
console.log(goalsObj);

JSON的问题数据来自于JavaScript / HTML5中的localStorage

1 个答案: