deno.tar.gz

Deno

Deno is a simple and secure runtime for JavaScript and TypeScript and it’s on the rise. It has many similarities to Node, but it also has some useful new features such as: security by default, TypeScript by default, ES modules, and improved package management.

If you want to be on the cutting edge of the latest web development technologies then Deno is a good start.

In this mini course, you will first refresh your understanding of TypeScript, as it is extensively used with Deno. You will cover the basic types as well as interfaces and classes.

In the second half of this course, you will learn how to create a CRUD REST API using Deno and Oak. By the end of this course, you can add a great new skill to your resume and you can start experimenting with it in old or new projects.

Creating a CRUD REST API with Deno & Oak

# Type assertions
Sometimes you may end up in a situation where you know more about the type of a variable than TypeScript. This is typically the case when you know the type of a variable to be more specific than its current type.

This is where type assertions come in. It's essentially a way for you to tell the TypeScript compiler that you know what you're doing.

A type assertion is like a type cast in other languages, but it does not perform special checking or data restructuring. It does not have any runtime impact and is used strictly by the compiler. There are two ways of performing type assertions.

We'll introduce ourselves to a few more TypeScript concepts in this lesson.

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TypeScript Basics Part II

Type assertions