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Deno Web Development

You're reading from   Deno Web Development Write, test, maintain, and deploy JavaScript and TypeScript web applications using Deno

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781800205666
Length 310 pages
Edition 1st Edition
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Authors (2):
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Alexandre Santos Alexandre Santos
Author Profile Icon Alexandre Santos
Alexandre Santos
Alexandre Portela dos Santos Alexandre Portela dos Santos
Author Profile Icon Alexandre Portela dos Santos
Alexandre Portela dos Santos
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Table of Contents (15) Chapters Close

Preface 1. Section 1: Getting Familiar with Deno
2. Chapter 1: What is Deno? FREE CHAPTER 3. Chapter 2: The Toolchain 4. Chapter 3: The Runtime and Standard Library 5. Section 2: Building an Application
6. Chapter 4: Building a Web Application 7. Chapter 5: Adding Users and Migrating to Oak 8. Chapter 6: Adding Authentication and Connecting to the Database 9. Chapter 7: HTTPS, Extracting Configuration, and Deno in the Browser 10. Section 3: Testing and Deploying
11. Chapter 8: Testing – Unit and Integration 12. Chapter 9: Deploying a Deno Application 13. Chapter 10: What's Next? 14. Other Books You May Enjoy

Debugging code in Deno

Even when we're following best practices and doing our best to write simple, clean code, any relevant program is very likely to need debugging once in a while.

Mastering the ability to quickly run and debug code is one of the best ways to improve your learning curve for any technology. This skill makes it easy to test and understand how stuff works by trial and error and fast experimentation.

Let's learn how can we debug our code.

The first step is to create a second program. Let's add a couple of variables that we can inspect later. The main objective of this program is to return the current time. We'll be using the already known Date object to do this. Let's call this file get-current-time.js, like so:

const now = new Date();
console.log(`${now.getHours()}:${now.getMinutes()}:  ${now.getSeconds()}`);

What if we want to debug the value of the now variable before it prints to the console? This is where debugging...

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