Built a TypeScript form validator from scratch to actually learn TypeScript!

I kept copy-pasting TypeScript without really understanding it. I am leading a project where a major chunk is written by developers using ts and I felt lost. So I forced myself to build something without reaching for a library. The result is a tiny type-safe form validator. You give it a schema and some data, it tells you what's wrong: const result = validate < SignupForm > ( { email : { required : true , pattern : / \S +@ \S + \.\S +/ }, password : { required : true , minLength : 8 }, }, { email : " notanemail " , password : " abc " , } ) // { valid: false, errors: { email: ["Must be a valid email"], password: ["Minimum length is 8"] } } Honestly the TypeScript stuff was less confusing than I expected once I stopped trying to understand it abstractly and just wrote it. Published it to npm as form-validator-ts. If you're learning TypeScript, just build something small without a library. Two hours of confusion teaches more than two weeks of tutorials. Try it npm install form-validator-t