Delve into building a GraphQL endpoint with Deno, compare technologies, configure queries, and integrate PostgresSQL and MongoDB databases to create a secure, high-performing application.

deno.tar.gz

Deno version

Deno run

deno_run_application

deno_run_db

deno_run_application_server_ts_file

docker-deno

Deno is a modern and secure runtime for JavaScript. It was created by the same team that created Node.js. Deno offers better performance, security, and simplicity than any other JavaScript runtime.

In this course, you will start by understanding the different technologies used in Deno, such as Typescript. You will compare these technologies with JavaScript and GraphQL as well as learn their terminologies. Then, you will create your own endpoint with Deno and configure queries and mutations in it. Next, you will explore two different databases with Deno: first, you’ll learn how to set up an SQL database using PostgresSQL and then how to configure a NoSQL database using MongoDB to store documents and collections of on-demand data. Finally, you’ll put everything together to have a fully functioning GraphQL endpoint made with Deno and backed by PostgreSQL and MongoDB. 

After this course, you’ll be able to create a Deno application and a GraphQL endpoint while having a database of your choice to store data.

Building a GraphQL Endpoint with Deno

How do you fetch data with GraphQL?

```
{
  user(id: "1000") (
    username,
    email
  )
}
```

```
{
  user(id: "1000") {
    username,
    email
  }
}
```

```
{
  user {
    username,
    email
  } (id: "1000")
}
```

How do we get a user object with `id = 1000` and properties `username` and `email` in GraphQL?

How do we get a user object with <code>id = 1000</code> and properties <code>username</code> and <code>email</code> in GraphQL?

**(Select all that apply.)** Which processes can be performed with GraphQL?

(Select all that apply.) Which processes can be performed with GraphQL?

**(True or False.)** Deno allows third-party module.

(True or False.) Deno allows third-party module.

TypeScript is used to write which type of code?

TypeScript is used to write which type of code?

**(True or False.)** Can we use ES7 with TypeScript and compile it to an ES5 JavaScript file?

(True or False.) Can we use ES7 with TypeScript and compile it to an ES5 JavaScript file?

Quiz yourself on Deno, Typescript, and GraphQL.

Introduction to Deno, TypeScript, and GraphQL

Creating a Basic GraphQL Endpoint

Databases and Deno

SQL: Postgres and Deno

NoSQL: Mongo and Deno

Wrapping Up

Appendix

Quiz: Introduction to Deno, TypeScript, and GraphQL