typescript-schema-validator

A minimal interfaces / types schema generator for validation in runtime

Installation

npm i typescript-schema-validator --save-dev

or

yarn add typescript-schema-validator -D

Steps

1. Create a schema file in ts

// schema.ts
export interface UserRequest {
  name: string;
  email: string;
}

3. Add a script (package.json) to generate your schema file (Optional). You can generate schema file directly with this package's CLI generate-schema

"scripts": {
  "generate-ts-schema": "generate-schema"
}

4. Run the generator from package.json scripts

yarn generate-ts-schema <schema fille> <new generated file name>
or directly from package command line
yarn generate-schema <schema fille> <new generated file name>

example

yarn generate-schema schema.ts generated-schema

5. Use it in your express app to validate the incoming request

// @ts-ignore
import tsv from "typescript-schema-validator";
import express, { Express, Request, Response } from "express";
import schema from "./generated-schema";

const app: Express = express();
const port: number = 3000;

app.get("/", (req: Request, res: Response) => {
  const validation = tsv(schema.UserRequest, { name: "Nusendra" });
  res.send(validation);
});

app.listen(port, () => {
  console.log(`⚡️[server]: Server is running at http://localhost:${port}`);
});