Javascript

My Top 6 JavaScript Book Picks!

Published Aug 11, 2022

Updated Feb 13, 2023

4 min read

This article was written over 18 months ago and may contain information that is out of date. Some content may be relevant but please refer to the relevant official documentation or available resources for the latest information.

There is a lot of great content out there to help you understand JavaScript better. But sometimes it is hard to know which resources to look into and invest your time in.

In this article, I will list six of my favorite JavaScript books that have been staples in the community for many years. Some of these books are great for beginners while other books are more geared towards the experienced JavaScript developer.

You Don't Know JS Yet
JavaScript: The Good Parts
JavaScript and jQuery: Interactive Front-End Web Development
JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language 7th Edition
Eloquent JavaScript
Learning JavaScript Design Patterns

You Don't Know JS Yet

Kyle Simpson is an experienced educator and software engineer who does a great job of diving into the intricate details of JavaScript. This is an ongoing series of books that covers JavaScript fundamentals, scope, closures, objects, classes, and more. The first book, You Don't Know JS Yet: Get Started, discusses what JavaScript is and covers important fundamentals. It also provides an overview on what to expect in the later books of the series.

The second book, You Don't Know JS Yet: Scope & Closures, dives deep into the different types of scope, closures and the module pattern. Kyle does a great job of removing the mystery behind how scope and closures really work in JavaScript.

These first two books are available for purchase at many popular online retailers and book stores. You can also read them for free on Kyle's GitHub repository. You can also see the progress for earlier drafts for the later books on Objects, class, types and more.

This book series is appropriate for all levels. Even if you are an experienced JavaScript developer, you can still learn about the intricate details of this language. You might also clear up any confusion on misconceptions for certain topics.

JavaScript: The Good Parts

In this book, Doug Crockford focuses on the "good" or elegant aspects of JavaScript. Doug goes in depth on JavaScript syntax, objects, functions, inheritance and more. The focus of this book is to only look at the "good" parts as defined by Doug Crockford and "unlearn" the bad parts of JavaScript. While others might disagree with what is considered "good" or "bad" in JavaScript, this is still a good book to read for all levels.

JavaScript: The Good Parts is available at any major online retailer or book store.

JavaScript and jQuery: Interactive Front-End Web Development

If you are just starting out learning JavaScript, then I highly recommend this book by John Duckett. The mixtures of rich illustrations and text makes it easy to follow. All of the core JavaScript fundamentals are covered and hundreds of code examples are provided throughout. I really like John's use of visual infographics and diagrams to help introduce complex concepts. Even though this book was published before ES6, I still think this is valuable resources for beginners learning JavaScript fundamentals.

JavaScript and jQuery: Interactive Front-End Web Development is available at any major online retailer or book store.

JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language 7th Edition

This definitive guide has been a staple in the JavaScript community and is written by prolific author and programmer David Flanagan. This 2020 version covers core JavaScript fundamentals, classes, modules, iterators, web API's, generators, Promises, async/await, and more. There is also a section for Node and popular tools and language extensions for JavaScript developers. This guide is great for those looking to hone their JavaScript skills and have a deeper understanding of the language.

JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language 7th Edition is available at any major online retailer or book store.

Eloquent JavaScript

Eloquent JavaScript is an in depth guide into the language, and Node.JS. Marijn Haverbeke covers core concepts including values, types, high order functions, asynchronous JavaScript, the Document Object Model, the Canvas API and more. There are also fun projects to build along the way including a platformer game, Pixel Art Editor and Skill sharing website.

This book is great if you have some familiarity with the language already and want a deeper understanding. It is also 100% free on https://eloquentjavascript.net/.

Learning JavaScript Design Patterns

If you are already familiar with JavaScript and want to learn more about design patterns, I suggest looking into this book. Addy Osmani divides the book into three parts: Design patterns, Rendering patterns, and Performance patterns. Some of the patterns covered include the module pattern, Hooks pattern, Prototype pattern, and more. There are a lot of rich code examples and sandboxes allowing users to play around with the code.

You can access the entire book for free on https://www.patterns.dev/posts/classic-design-patterns/.

Conclusion

I hope you enjoyed that list of JavaScript books worth your time. There is always something to learn with JavaScript, and I hope it will help you grown in your career.

This Dot is a consultancy dedicated to guiding companies through their modernization and digital transformation journeys. Specializing in replatforming, modernizing, and launching new initiatives, we stand out by taking true ownership of your engineering projects.

We love helping teams with projects that have missed their deadlines or helping keep your strategic digital initiatives on course. Check out our case studies and our clients that trust us with their engineering.

About the author(s)

Jessica Wilkins
Jessica Wilkins is a classical musician turned Software Engineer. Prior to joining the tech industry, she spent her time running her own sheet music company (JDW Sheet Music) as well as performing and teaching in Los Angeles, CA. She enjoys working with React and TypeScript. She is also a prolific technical writer for freeCodeCamp.
@codergirl1991 @jdwilkin4

D1 SQLite: Writing queries with the D1 Client API

Writing queries with the D1 Client API In the previous post we defined our database schema, got up and running with migrations, and loaded some seed data into our database. In this post we will be working with our new database and seed data. If you want to participate, make sure to follow the steps in the first post. We’ve been taking a minimal approach so far by using only wrangler and sql scripts for our workflow. The D1 Client API has a small surface area. Thanks to the power of SQL, we will have everything we need to construct all types of queries. Before we start writing our queries, let's touch on some important concepts. Prepared statements and parameter binding This is the first section of the docs and it highlights two different ways to write our SQL statements using the client API: prepared and static statements. Best practice is to use prepared statements because they are more performant and prevent SQL injection attacks. So we will write our queries using prepared statements. We need to use parameter binding to build our queries with prepared statements. This is pretty straightforward and there are two variations. By default we add ? ’s to our statement to represent a value to be filled in. The bind method will bind the parameters to each question mark by their index. The first ? is tied to the first parameter in bind, 2nd, etc. I would stick with this most of the time to avoid any confusion. ` I like this second method less as it feels like something I can imagine messing up very innocently. You can add a number directly after a question mark to indicate which number parameter it should be bound to. In this exampl, we reverse the previous binding. ` Reusing prepared statements If we take the first example above and not bind any values we have a statement that can be reused: ` Querying For the purposes of this post we will just build example queries by writing them out directly in our Worker fetch handler. If you are building an app I would recommend building functions or some other abstraction around your queries. select queries Let's write our first query against our data set to get our feet wet. Here’s the initial worker code and a query for all authors: ` We pass our SQL statement into prepare and use the all method to get all the rows. Notice that we are able to pass our types to a generic parameter in all. This allows us to get a fully typed response from our query. We can run our worker with npm run dev and access it at http://localhost:8787 by default. We’ll keep this simple workflow of writing queries and passing them as a json response for inspection in the browser. Opening the page we get our author results. joins Not using an ORM means we have full control over our own destiny. Like anything else though, this has tradeoffs. Let’s look at a query to fetch the list of posts that includes author and tags information. ` Let’s walk through each part of the query and highlight some pros and cons. ` * The query selects all columns from the posts table. * It also selects the name column from the authors table and renames it to author_name. * It aggregates the name column from the tags table into a JSON array. If there are no tags, it returns an empty JSON array. This aggregated result is renamed to tags. ` * The query starts by selecting data from the posts table. * It then joins the authors table to include author information for each post, matching posts to authors using the author_id column in posts and the id column in authors. * Next, it left joins the posts_tags table to include tag associations for each post, ensuring that all posts are included even if they have no tags. * Next, it left joins the tags table to include tag names, matching tags to posts using the tag_id column in posts_tags and the id column in tags. * Finally, group the results by the post id so that all rows with the same post id are combined in a single row SQL provides a lot of power to query our data in interesting ways. JOIN ’s will typically be more performant than performing additional queries.You could just as easily write a simpler version of this query that uses subqueries to fetch post tags and join all the data by hand with JavaScript. This is the nice thing about writing SQL, you’re free to fetch and handle your data how you please. Our results should look similar to this: ` This brings us to our next topic. Marshaling / coercing result data A couple of things we notice about the format of the result data our query provides: Rows are flat. We join the author directly onto the post and prefix its column names with author. ` Using an ORM we might get the data back as a child object: ` Another thing is that our tags data is a JSON string and not a JavaScript array. This means that we will need to parse it ourselves. ` This isn’t the end of the world but it is some more work on our end to coerce the result data into the format that we actually want. This problem is handled in most ORM’s and is their main selling point in my opinion. insert / update / delete Next, let’s write a function that will add a new post to our database. ` There’s a few queries involved in our create post function: * first we create the new post * next we run through the tags and either create or return an existing tag * finally, we add entries to our post_tags join table to associate our new post with the tags assigned We can test our new function by providing post content in query params on our index page and formatting them for our function. ` I gave it a run like this: http://localhost:8787authorId=1&tags=Food%2CReview&title=A+review+of+my+favorite+Italian+restaurant&content=I+got+the+sausage+orchette+and+it+was+amazing.+I+wish+that+instead+of+baby+broccoli+they+used+rapini.+Otherwise+it+was+a+perfect+dish+and+the+vibes+were+great And got a new post with the id 11. UPDATE and DELETE operations are pretty similar to what we’ve seen so far. Most complexity in your queries will be similar to what we’ve seen in the posts query where we want to JOIN or GROUP BY data in various ways. To update the post we can write a query that looks like this: ` COALESCE acts similarly to if we had written a ?? b in JavaScript. If the binded value that we provide is null it will fall back to the default. We can delete our new post with a simple DELETE query: ` Transactions / Batching One thing to note with D1 is that I don’t think the traditional style of SQLite transactions are supported. You can use the db.batch API to achieve similar functionality though. According to the docs: Batched statements are SQL transactions ↗. If a statement in the sequence fails, then an error is returned for that specific statement, and it aborts or rolls back the entire sequence. ` Summary In this post, we've taken a hands-on approach to exploring the D1 Client API, starting with defining our database schema and loading seed data. We then dove into writing queries, covering the basics of prepared statements and parameter binding, before moving on to more complex topics like joins and transactions. We saw how to construct and execute queries to fetch data from our database, including how to handle relationships between tables and marshal result data into a usable format. We also touched on inserting, updating, and deleting data, and how to use transactions to ensure data consistency. By working through these examples, we've gained a solid understanding of how to use the D1 Client API to interact with our database and build robust, data-driven applications....

Dec 23, 2024

6 mins

JavaScript

Exploring Angular Forms: A New Alternative with Signals

Exploring Angular Forms: A New Alternative with Signals In the world of Angular, forms are essential for user interaction, whether you're crafting a simple login page or a more complex user profile interface. Angular traditionally offers two primary approaches: template-driven forms and reactive forms. In my previous series on Angular Reactive Forms, I explored how to harness reactive forms' power to manage complex logic, create dynamic forms, and build custom form controls. A new tool for managing reactivity - signals - has been introduced in version 16 of Angular and has been the focus of Angular maintainers ever since, becoming stable with version 17. Signals allow you to handle state changes declaratively, offering an exciting alternative that combines the simplicity of template-driven forms with the robust reactivity of reactive forms. This article will examine how signals can add reactivity to both simple and complex forms in Angular. Recap: Angular Forms Approaches Before diving into the topic of enhancing template-driven forms with signals, let’s quickly recap Angular's traditional forms approaches: 1. Template-Driven Forms: Defined directly in the HTML template using directives like ngModel, these forms are easy to set up and are ideal for simple forms. However, they may not provide the fine-grained control required for more complex scenarios. Here's a minimal example of a template-driven form: ` ` 2. Reactive Forms: Managed programmatically in the component class using Angular's FormGroup, FormControl, and FormArray classes; reactive forms offer granular control over form state and validation. This approach is well-suited for complex forms, as my previous articles on Angular Reactive Forms discussed. And here's a minimal example of a reactive form: ` ` Introducing Signals as a New Way to Handle Form Reactivity With the release of Angular 16, signals have emerged as a new way to manage reactivity. Signals provide a declarative approach to state management, making your code more predictable and easier to understand. When applied to forms, signals can enhance the simplicity of template-driven forms while offering the reactivity and control typically associated with reactive forms. Let’s explore how signals can be used in both simple and complex form scenarios. Example 1: A Simple Template-Driven Form with Signals Consider a basic login form. Typically, this would be implemented using template-driven forms like this: ` ` This approach works well for simple forms, but by introducing signals, we can keep the simplicity while adding reactive capabilities: ` ` In this example, the form fields are defined as signals, allowing for reactive updates whenever the form state changes. The formValue signal provides a computed value that reflects the current state of the form. This approach offers a more declarative way to manage form state and reactivity, combining the simplicity of template-driven forms with the power of signals. You may be tempted to define the form directly as an object inside a signal. While such an approach may seem more concise, typing into the individual fields does not dispatch reactivity updates, which is usually a deal breaker. Here’s an example StackBlitz with a component suffering from such an issue: Therefore, if you'd like to react to changes in the form fields, it's better to define each field as a separate signal. By defining each form field as a separate signal, you ensure that changes to individual fields trigger reactivity updates correctly. Example 2: A Complex Form with Signals You may see little benefit in using signals for simple forms like the login form above, but they truly shine when handling more complex forms. Let's explore a more intricate scenario - a user profile form that includes fields like firstName, lastName, email, phoneNumbers, and address. The phoneNumbers field is dynamic, allowing users to add or remove phone numbers as needed. Here's how this form might be defined using signals: ` > Notice that the phoneNumbers field is defined as a signal of an array of signals. This structure allows us to track changes to individual phone numbers and update the form state reactively. The addPhoneNumber and removePhoneNumber methods update the phoneNumbers signal array, triggering reactivity updates in the form. ` > In the template, we use the phoneNumbers signal array to dynamically render the phone number input fields. The addPhoneNumber and removePhoneNumber methods allow users to reactively add or remove phone numbers, updating the form state. Notice the usage of the track function, which is necessary to ensure that the ngFor directive tracks changes to the phoneNumbers array correctly. Here's a StackBlitz demo of the complex form example for you to play around with: Validating Forms with Signals Validation is critical to any form, ensuring that user input meets the required criteria before submission. With signals, validation can be handled in a reactive and declarative manner. In the complex form example above, we've implemented a computed signal called formValid, which checks whether all fields meet specific validation criteria. The validation logic can easily be customized to accommodate different rules, such as checking for valid email formats or ensuring that all required fields are filled out. Using signals for validation allows you to create more maintainable and testable code, as the validation rules are clearly defined and react automatically to changes in form fields. It can even be abstracted into a separate utility to make it reusable across different forms. In the complex form example, the formValid signal ensures that all required fields are filled and validates the email and phone numbers format. This approach to validation is a bit simple and needs to be better connected to the actual form fields. While it will work for many use cases, in some cases, you might want to wait until explicit "signal forms" support is added to Angular. Tim Deschryver started implementing some abstractions around signal forms, including validation and wrote an article about it. Let's see if something like this will be added to Angular in the future. Why Use Signals in Angular Forms? The adoption of signals in Angular provides a powerful new way to manage form state and reactivity. Signals offer a flexible, declarative approach that can simplify complex form handling by combining the strengths of template-driven forms and reactive forms. Here are some key benefits of using signals in Angular forms: 1. Declarative State Management: Signals allow you to define form fields and computed values declaratively, making your code more predictable and easier to understand. 2. Reactivity: Signals provide reactive updates to form fields, ensuring that changes to the form state trigger reactivity updates automatically. 3. Granular Control: Signals allow you to define form fields at a granular level, enabling fine-grained control over form state and validation. 4. Dynamic Forms: Signals can be used to create dynamic forms with fields that can be added or removed dynamically, providing a flexible way to handle complex form scenarios. 5. Simplicity: Signals can offer a simpler, more concise way to manage form states than traditional reactive forms, making building and maintaining complex forms easier. Conclusion In my previous articles, we explored the powerful features of Angular reactive forms, from dynamic form construction to custom form controls. With the introduction of signals, Angular developers have a new tool that merges the simplicity of template-driven forms with the reactivity of reactive forms. While many use cases warrant Reactive Forms, signals provide a fresh, powerful alternative for managing form state in Angular applications requiring a more straightforward, declarative approach. As Angular continues to evolve, experimenting with these new features will help you build more maintainable, performant applications. Happy coding!...

Oct 4, 2024

5 mins

AngularJavaScript

How to Handle Uploaded Images and Avoid Image Distortion

When you are working with images in your application, you might run into issues where the image's aspect ratio is different from the container's specified width and height. This could lead to images looking stretched and distorted. In this article, we will take a look at how to solve this problem by using the object-fit CSS property. A Look Into the Issue Using the "Let's Chat With" App Let's Chat With is an open source application that facilitates networking between attendees for virtual and in-person conferences. When users sign up for the app, they can join a conference and create a new profile with their name, image, and bio. When the team at This Dot Labs was testing the application, they noticed that some of the profile images were coming out distorted. The original uploaded source image did not have an aspect ratio of 1:1. A 1:1 aspect ratio refers to an image's width and height being the same. Since the image was not a square, it was not fitting well within the dimensions below. ` In order to fix this problem, the team decided to use the object-fit CSS property. What is the object-fit CSS property? The object-fit property is used to determine how an image or video should resize in order to fit inside its container. There are 5 main values you can use with the object-fit property. - object-fit: contain; - resizes the content to fit inside the container without cropping it - object-fit: cover; - ensures the all of the content covers the container and will crop if necessary - object-fit: fill; - fills the container with the content by stretching it and ignoring the aspect ratio. This could lead to image distortion. - object-fit: none; - does not resize the content which could lead to the content spilling out of the container - object-fit: scale-down; - scales larger content down to fit inside the container When the object-fit: cover; property was applied to the profile image in Let's Chat With, the image was no longer distorted. ` When Should You Consider Using the object-fit Property? There will be times where you will not be able to upload different sized images to fit different containers. You might be in a situation like Let's Chat With, where the user is uploading images to your application. In that case, you will need to apply a solution to ensure that the content appropriately resizes within the container without becoming distorted. Conclusion In this article, we learned about how to fix distorted uploaded images using the object-fit property. We examined the bug inside the Let's Chat With application and how that bug was solved using object-fit: cover;. We also talked about when you should consider using the object-fit property. If you want to check out the Let's Chat with app, you can signup here. If you are interested in contributing to the app, you can check out the GitHub repository....

Jul 28, 2023

3 mins

JavaScript

Building a Stripe App: A Step-by-Step Guide to QR Code Generation

Building a Stripe App: A Step-by-Step Guide to QR Code Generation Why Build a Stripe App? I recently participated in an audio space with the Stripe team, and something they said really stuck with me: the Stripe app store is a growing area that isn't overly saturated yet. There's a lot of potential for new apps, and companies can use this opportunity to grow. I work at a company called This Dot Labs, and we've created several Stripe apps and even own one. After looking at the data, I can confirm that the Stripe team was right! Creating a QR Code Generator App For this tutorial, we'll build a QR code app that can take a URL and generate a code for it. This is a good use case to help you understand the ins and outs of Stripe's developer tools. Why QR Codes? QR codes are useful tools that have become common in e-commerce, restaurants, and other industries. While Stripe already has a QR code tool, we'll make our own to familiarize ourselves with their syntax and problem-solving approaches. Project Structure Before we dive into the implementation, let's look at the structure of our Stripe App QR Code project: * .vscode: Contains settings for Visual Studio Code * source/views: Holds the main application views * .gitignore: Specifies files to ignore in version control * stripe-app.json: Defines the Stripe app configuration * ui-extensions.d.ts: TypeScript declaration file for UI extensions * .build: this is where the built Stripe app gets placed. Step-by-Step Implementation 1\. Install Stripe Locally First, you need to install Stripe on your local machine. The documentation provides great instructions for this: * For Mac users: Use Brew to install * For Windows users: Download the package and add it to your environment variables You can find the details here in the stripe docs to install the Stripe CLI https://docs.stripe.com/stripe-cli When using Windows, you must do stripe login from Powershell, NOT from Git bash or any other tool. After the server is up, then you can continue using git bash for everything else. After stripe login, you need to enter stripe apps start. Once you do that, the server is up and running and you can go back to using git bash or any other tool. 2\. Install Dependencies We'll be using an extra package for QR code generation. Install it using npm: ` 3\. Set Up the Main Component Let's look at the home.tsx file, where we'll use Stripe's UI components: ` These components are similar to other UI libraries like Bootstrap or Tailwind CSS. 4\. Create the UI Structure Our app will have: * An input field for the URL * Validation using a regex pattern * Error handling for invalid URLs * QR code generation and display Here is the Home.tsx file that is located in the src/views folder ` * ContextView` is at the top level of the app where we see the Title and the link to the Stripe Docs that we placed in our Context View. * Box is how you use Divs. * Banners can be used to show notification errors or any other item you wish to display. * Textfields are input fields. * Everything else is pretty self-explanatory. 5\. Handle Content Security Policy One problem I personally ran into was when I tried to redirect users, the Stripe policies would block it since I did not express that I knew what it was doing. I had to go into the stripe-app.json file and mention the specific security policies. For this particular exercise, I kept these as null. This is my stripe-app.json file. ` 6\. Configure App Views As you can see here, the stripe-app.json file shows the views for each file I have. The Home.tsx file and the Invoice.tsx are also included This is our way of saying that for each view we have, show the app functionality on that page. Our stripe-app.json file will show it but also, the manifest.js file in our .build folder will also show the same. Any view that doesn't have a file will not show the application's functionality. So, if I were to go to transactions, the app would not show the same logic as the home or invoices page. By following these steps, you'll have a fully functional QR code generator app for Stripe. This is just a simple example, but the potential for Stripe apps is massive, especially for businesses serving e-commerce customers. If you need help or get stuck, don't hesitate to reach out, danny.thompson@thisdot.co. The Stripe team is also very active in answering questions, so leverage them as a resource. Happy coding!...

Dec 18, 2024

4 mins

stripe

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My Top 6 JavaScript Book Picks!

Table of contents

You Don't Know JS Yet

JavaScript: The Good Parts

JavaScript and jQuery: Interactive Front-End Web Development

JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language 7th Edition

Eloquent JavaScript

Learning JavaScript Design Patterns

Conclusion

Jessica Wilkins

You might also like

D1 SQLite: Writing queries with the D1 Client API

Exploring Angular Forms: A New Alternative with Signals

How to Handle Uploaded Images and Avoid Image Distortion

Building a Stripe App: A Step-by-Step Guide to QR Code Generation

Let's innovate together!

You might also like

D1 SQLite: Writing queries with the D1 Client API

Exploring Angular Forms: A New Alternative with Signals

How to Handle Uploaded Images and Avoid Image Distortion

Building a Stripe App: A Step-by-Step Guide to QR Code Generation