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- AngularJS operates on traditional or real DOM – that means if you make a small change in one element, it updates the whole tree data structure. This results in significant decrease in performance especially if your application is going to have too many watchers.
- ReactJS makes use of virtual DOM that is designed to enhance the app performance and only updates elements that needs to be updated due to occurrence of changes, while having no effect on other components of the whole tree structure.
Creating a single page application (SPA) is possible with both Angular and React technologies but the decision should be made on whether your final product would be a small, medium, or large application.
- AngularJS has a rigid architecture. Developing a relatively small single page application will be made fully functional right away; but when you try to add new functionalities into your AngularJS app, it will severely restrict the scope of your efforts at a very early stage of the development.
- ReactJS, on the other hand, has a quite flexible architecture that allows for more changes during the course of web application development. If you’re looking to produce a larger final app for the future then ReactJS is, no doubt, a practical option out of the two.
The speed of developing an SPA comes down to having the necessary libraries on hand with ready functions or code, right at the beginning.
- AngularJS lets you start developing an app immediately by simply adding a library to your dependencies. Its ecosystem is also quite immense that includes packages, add-ons, and plugins to make development easier.
- ReactJS has a rapidly growing list of tools and its community is also burgeoning. When you’re at the initial stage of the app development in ReactJS, you’re struck with kind of choice paralysis because you’ve several build tools to pick out the best one – and it slows down the process.
Search Engine Optimization
You want your application to attain the maximum visibility on the internet; therefore you need to go with a technology that’s more SEO friendly in its essence.
- AngularJS is almost completely rendered right inside the browser and requires additional tools to address SEO concerns, such as PhantomJS.
- ReactJS offers server-side rendering (SSR) which is better for search engine optimization and demands a little effort to carry out SEO best practices.