Getting Started with Deno and Deno Deploy

Deno is a modern JavaScript runtime similar to Node.js, but it supports TypeScript out of the box. It is designed to provide a secure environment for executing JavaScript and TypeScript code, with built-in utilities like a formatter, linter, and testing framework. Deno emphasizes security and supports Web APIs for operations like fetching resources, mirroring the functionality available in modern browsers.

Deno and Node.js are both JavaScript runtimes, but Deno provides several enhancements and differences. Notably, Deno includes built-in support for TypeScript, offers a more secure sandbox environment by default, and does not use the npm package manager. Instead, Deno imports modules using URLs, similar to importing scripts in a web browser. Deno also includes built-in tools like a formatter and linter, which are not built into Node.js.

Deno Deploy is a distributed system designed to run JavaScript, TypeScript, and WebAssembly at the edge, close to users. It aims to minimize latency by running code in global data centers closer to the end user. Deno Deploy integrates directly with the Deno runtime, providing a seamless experience for developers to run their applications across the globe efficiently.

To create a new Deno project, start by creating a new directory and a main TypeScript file. Deno does not require a package.json file or node_modules directory. You can run your script using 'deno run' followed by your script name. For structured projects, Deno offers utilities like a project initializer which helps in setting up projects with recommended configurations.

Fresh is a full stack web framework specifically designed for Deno. It leverages the capabilities of Deno and is optimized for building fast, efficient, and scalable web applications. Fresh follows the islands architecture, allowing parts of your application to be interactive, minimizing the amount of JavaScript shipped to the client, and improving load times and performance.

Yes, Deno has a built-in testing framework that allows you to write and run tests for your applications. You can create test files with '_test.ts' suffix and use 'deno test' to execute them. Deno's testing framework supports features like test isolation and real-time feedback, making it a powerful tool for developing robust applications.