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- How do I persist a ES6 Map in localstorage (or elsewhere)? 6 answers
- 如何在localstorage(或其他地方)中持久化ES6映射?6答案
I'd like to start using ES6 Map instead of JS objects but I'm being held back because I can't figure out how to JSON.stringify() a Map. My keys are guaranteed to be strings and my values will always be lists. Do I really have to write a wrapper method to serialize?
我想开始使用ES6映射而不是JS对象，但是由于我不知道如何使用JSON.stringify()映射，我被限制了。我的键是字符串，我的值总是列表。我真的需要编写一个包装器方法来序列化吗?
1 个解决方案
#1
32
You can't.
你不能。
The keys of a map can be anything, including objects. But JSON syntax only allows strings as keys. So it's impossible in a general case.
地图的键可以是任何东西，包括对象。但是JSON语法只允许字符串作为键。所以在一般情况下是不可能的。
My keys are guaranteed to be strings and my values will always be lists
我的键是字符串，我的值总是列表
In this case, you can use a plain object. It will have these advantages:
在这种情况下，可以使用普通对象。它将具有以下优点:
- It will be able to be stringified to JSON.
- 它将能够被绑定到JSON。
- It will work on older browsers.
- 它将适用于旧的浏览器。
- It might be faster.
- 可能会更快。
#1
32
You can't.
你不能。
The keys of a map can be anything, including objects. But JSON syntax only allows strings as keys. So it's impossible in a general case.
地图的键可以是任何东西，包括对象。但是JSON语法只允许字符串作为键。所以在一般情况下是不可能的。
My keys are guaranteed to be strings and my values will always be lists
我的键是字符串，我的值总是列表
In this case, you can use a plain object. It will have these advantages:
在这种情况下，可以使用普通对象。它将具有以下优点:
- It will be able to be stringified to JSON.
- 它将能够被绑定到JSON。
- It will work on older browsers.
- 它将适用于旧的浏览器。
- It might be faster.
- 可能会更快。