In this blog, we’ve discussed measuring and improving our performance using the Lighthouse audits. Google continued by introducing new tools that emphasize performance. Some time ago, they introduced the Web Vitals standard. In this article, we go through it and provide examples of measuring the Web Vitals metrics with React. Introducing Web Vitals There are […]
Monorepo is an approach in which we store multiple projects in the same repository. It is common across big tech companies, such as Uber or Google. Even NestJS manages its source code in a monorepo with Lerna. When we store all of our code in a single repository, it might be easier to understand how different […]
When using TypeScript, we usually strive to define the exact type of data we’re dealing with. Sometimes it is not possible, though. In this article, we look into various options on how to handle an object that has a structure we don’t know. A good example is implementing a JSON editor. The object type One […]
We’ve introduced various ways of caching files on the server throughout this series. This article teaches how to help the browser perform caching on the client side. We use the entity tag (ETag) response header to do that. Imagine having a GET /user/[user-id]/avatar endpoint that responds with an image. The browser calls it every time we […]
Making sure a website is secure should be a priority of every developer. Fortunately, we can often increase security by adding a straightforward HTPP header. In this article, we explain what a man-in-the-middle attack is. We also explain how to deal with some of its examples by adding the HTTP Strict Transport Security (HSTS) header. […]
We’ve learned how to use Redux Middleware to manage WebSockets in a recent article. We’ve also got to know the Redux Toolkit Query and how it can improve our code. Interestingly, we can also use RTK Query to deal with a WebSocket connection. This article teaches how to establish a WebSocket connection with RTK Query […]
The Redux team is working hard to create tools that are helpful in many real-life situations. For example, Redux Toolkit is a big step in simplifying how we write applications with Redux. Another helpful tool is the Redux Toolkit Query. Its primary sources of inspiration are the Apollo Client and React Query. The code we […]
Middleware is a great place to connect to WebSockets if you use Redux. This article explains what the Redux Middleware is and how to use it with WebSockets. In this blog, we also talk a lot about various backend technologies such as Express. One of the concepts popular there is middleware. In redux, it serves […]
Inheritance is one of the four pillars of object-oriented programming. JavaScript has the prototype-based inheritance, and with it, one object can acquire properties of another object. Even though JavaScript has the class keyword, it still uses prototypes under the hood. If you want to know to know more about prototypes, check out this article I wrote […]
In PostgreSQL, views act as virtual tables. Although they have rows and columns, we can’t insert any data into them manually. Instead, PostgreSQL runs an underlying query when we refer to the view. Creating views with PostgreSQL Let’s create a table of users to use it in a view.
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CREATE TABLE users ( id serial PRIMARY KEY, email text UNIQUE, is_email_confirmed boolean ) |
Now, let’s define a view […]
