Two web frameworks and each has its part to play. Why does choosing them for designing top web applications prove to be so advantageous?
What is React?
React is a JS-based library for building UI. It is also used for developing frontend of single-page applications (SPAs).
React is one of the most modern frameworks, leading alongside Angular, Vue, Svelte, and Solid. In 2021, according to the Stack Overflow Developer Survey, it won first place on the podium as the most popular web framework. More than 40% of all professional developers who participated in the survey chose it. And it's not all! It is loved by almost 70% of over 66,000 respondents.
What is Django?
Django is a Python web framework for the backend. Valued by such players as Instagram or Spotify, Django makes standard web practices of web development much easier.
In fact, the web apps world is so pleased to have Django that 55.3% of Django developers, who took the same annual Stack Overflow Survey, said they would continue to use it.
React App & a Django Backend
Let's take a closer look at a classic. Single-page React application in a Django project. Why even do this?
What is a Single-Page Application (SPA)?
SPA, or a Single-Page Application, is a website or a web app, which, in simplest-terms, does not reload on navigation.
Just like the city never sleeps, the SPA page is never refreshed. All code is retrieved with a single page load, or resources are added in response to the user's action.
It is faster on subsequent navigations, but the initial load will always be longer than in the case of a Multiple-Page App (MPA)
Why Is React a Great Choice?
React is not only one of the most popular tech but also a rapidly growing community with an impressive development speed. Loyal developers say that it makes app development easy and approachable and can be well used to create advanced user interfaces.
It gives us code reusability, so we can design some small components and then reuse them, even between projects.
React is working really well for a SPA, where our site is actually one site. Because in fact, from the React perspective, it is one application that supports the so-called routing, i.e. jumping between pages. So the code is rendered on the user side.
What else makes React solutions stand out?
- The components model of creating apps is easy to reason about
- The components are reusable - just like custom widgets.
- The unidirectional data flow guarantees the code’s balance
Furthermore, Virtual DOM is one of the biggest advantages of React.
How Does the Virtual DOM Work?
Let's use a metaphor.
Imagine you have a complex painting. Updating a small detail on the canvas would be a hassle - you'd need to repaint the whole thing! That's kind of how traditional web pages work.
React, a popular web development library, uses a smarter approach called the Virtual DOM. Think of it as a blueprint for your actual web page. When you make a change in your React code, it first updates this blueprint efficiently. Then, React compares the changes in the blueprint to the actual web page and only updates the specific parts that differ.
Here's a breakdown of how it works:
- Virtual DOM Update: When you make a change to your React code, React efficiently updates the virtual DOM to reflect those changes.
- Diffing: React then compares the new virtual DOM to the old one. It's like finding the differences between two drafts of your painting.
- Minimal Updates: Instead of updating the entire web page, React only identifies the minimal changes needed (like a brushstroke here or there).
- Real DOM Update: Finally, React applies those minimal changes to the actual web page, making it appear updated efficiently.
This virtual DOM approach makes React fast and efficient, especially for complex web applications that constantly change. It's like having a handy assistant who knows exactly what to update on your painting without wasting time.
Furthermore, React is a library, and not a framework, so it gives us a great opportunity to choose what we really need in the web app. And if we want to save time, you may choose a wide array of ready-made solutions. We have off-the-shelf UX and UI sets that we can easily customize. We don't have to build such things from scratch.
React and SEO: A Modern Approach
While React offers many benefits for building dynamic user interfaces, it wasn't always ideal for Search Engine Optimization (SEO). Traditionally, React rendered content on the client-side (user's browser) using JavaScript. Search engine crawlers primarily rely on HTML content to understand and rank web pages. This mismatch between what React displayed and what crawlers saw could lead to SEO issues.
Thankfully, React has evolved significantly. Modern versions of React (including version 18) and frameworks built on top of React (like Next.js and Gatsby) address SEO concerns through techniques like Server-Side Rendering (SSR). With SSR, the initial content of a web page is generated on the server-side, providing crawlers with the necessary HTML for indexing. This ensures your React application remains SEO-friendly.
Django: A Powerful Python Backend
Django is a popular and well-established Python web framework. It provides developers with a robust foundation to build web applications. Here are some of Django's strengths:
- Fast Development: Django offers tools like its built-in admin panel to quickly add functionality and manage data.
- Scalability: Django can handle small and large web applications effectively.
- Usable Templates: Django provides well-structured templates for building web pages, simplifying development. These templates can also be customized for unique needs.
