A few questions about type guards

• joi

  14 19,052 5.8 JavaScript

  Discontinued The most powerful data validation library for JS [Moved to: https://github.com/hapijs/joi]

  

  Since Typescript is just a language and not a library of some sorts, it doesn't add runtime functionality. If this is what you're after, there's so many libraries that help converting unknown's into known types - joi, yup, superstruct (my choice), purify-ts Codec, io-ts

• Yup

  113 22,166 7.1 TypeScript

  Dead simple Object schema validation

  Since Typescript is just a language and not a library of some sorts, it doesn't add runtime functionality. If this is what you're after, there's so many libraries that help converting unknown's into known types - joi, yup, superstruct (my choice), purify-ts Codec, io-ts

• SurveyJS

  surveyjs.io

  sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• Superstruct

  26 6,797 5.7 TypeScript

  A simple and composable way to validate data in JavaScript (and TypeScript).

  Since Typescript is just a language and not a library of some sorts, it doesn't add runtime functionality. If this is what you're after, there's so many libraries that help converting unknown's into known types - joi, yup, superstruct (my choice), purify-ts Codec, io-ts

• io-ts

  80 6,593 4.9 TypeScript

  Runtime type system for IO decoding/encoding

  Since Typescript is just a language and not a library of some sorts, it doesn't add runtime functionality. If this is what you're after, there's so many libraries that help converting unknown's into known types - joi, yup, superstruct (my choice), purify-ts Codec, io-ts

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