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Issue with Handling JSON Stringify in TypeScript with Date Objects

👀 Views: 89 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-12
json typescript date TypeScript

I'm experimenting with I'm upgrading from an older version and I'm stuck on something that should probably be simple. Quick question that's been bugging me - Quick question that's been bugging me - I'm facing an unexpected issue while trying to serialize an object containing Date properties to JSON in TypeScript..... When using `JSON.stringify`, the date is being converted into an incorrect format. For instance, I have a class that looks like this: ```typescript class Event { constructor(public name: string, public date: Date) {} } const myEvent = new Event('Birthday', new Date('2023-10-01')); const jsonString = JSON.stringify(myEvent); console.log(jsonString); ``` When I run this code, the output is: ```json {"name":"Birthday","date":"2023-10-01T00:00:00.000Z"} ``` This is not the format I want; I need the date in the format `YYYY-MM-DD` without the time component. I attempted to define a custom `toJSON` method in my class to format the date as follows: ```typescript class Event { constructor(public name: string, public date: Date) {} toJSON() { return { name: this.name, date: this.date.toISOString().split('T')[0] }; } } ``` Now, when I perform `JSON.stringify(myEvent)`, I receive the output: ```json {"name":"Birthday","date":"2023-10-01"} ``` This works perfectly, but I noticed that it breaks when I try to deserialize this JSON back into an `Event` object. Specifically, the `date` property is now a string instead of a Date object. This leads to issues when I want to perform date operations on the deserialized object. My deserialization code looks like this: ```typescript const parsedEvent = JSON.parse(jsonString); const eventFromJson = new Event(parsedEvent.name, new Date(parsedEvent.date)); ``` However, the `eventFromJson.date` is not being set correctly when I try to log it. I get the following output on the console: ``` Invalid Date ``` I've tried using the `Date.parse()` method as well, but it's still not working as expected. What is the best approach to handle the serialization and deserialization of Date objects in this scenario while ensuring the format remains consistent? Any suggestions or best practices would be greatly appreciated. My development environment is Ubuntu. I'd really appreciate any guidance on this. My development environment is Windows. Thanks in advance! For context: I'm using Typescript on Linux. I'm coming from a different tech stack and learning Typescript. I'm working in a Debian environment. I'd really appreciate any guidance on this.