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Protect your Next.js API with Zod

giancarlobuomprisco.com · 4 words · saved by 1 readers

The first step towards writing security API endpoints with Next.js should be make sure that the server receives the expected data structure from the clients. Various libraries help us validate the clients' payloads reasonably well, such as Joi and class-validator, which I have used extensively in the past. The library that impressed me the most lately has been Zod, a great validation library for working with Typescript written by colinhacks. Let's take a look at how we can use Zod for validating the payloads coming from a client, improving the security of your application, and helping you strong-typing your apps without as hacks. You can install Zod using npm: npm i zod --save Zod allows us to validate any datatype you can think of, such as complex objects, promises, or "simple" values. Thanks to the z object imported from Zod we can define the expected schema. From the Zod readme: If you need to validate more complex objects, we can use z.object(). This time around, though, you may wa

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