Introduction to Deno 2.0

Uncomplicate JavaScript.)

Deno is the open-source JavaScript runtime for the modern web.

Deno in 100s

Docs

Deno 2.0 Features

• A modern JavaScript runtime

• Performance

• Secure by default

• Native TypeScript Support

• No node_modules, no package installations, it's magic...🪄

• JSR package manager

• Jupyter Notebook Kernel

• Legacy support (backward compatible.)

Getting started

deno install 

Initialize

deno init

Run

deno main.ts 

deno run main.ts 

Optional, --allow-read/-R like tags for permissions! (*better security.)

Add packages

deno add

Remove packages

deno remove

Task

deno task

Format

deno fmt

Lint

deno lint

tsc

deno check main.ts

nodemon

deno run --watch

Test

deno test

Compile (*yeah, really.)

The executable file sizes are huge* because it comes with the minified deno runtime because, JavaScript is a "dynamic language". And If the difference between KB and MB matters to you, you shouldn't be using JavaScript in the first place.)

deno compile ./main.ts

Cross-compile

deno compile --target=x86_64-unknown-linux-gnu ./main.ts

Tip: --target for compile options.

Upgrade

deno upgrade

Until next time.)

✌️