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Blazor vs React: What are the differences?

Developers describe Blazor as "An experimental web UI framework using C#/Razor and HTML, running in the browser via WebAssembly". Blazor is a .NET web framework that runs in any browser. You author Blazor apps using C#/Razor and HTML. On the other hand, React is detailed as "A JavaScript library for building user interfaces". Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.

Blazor and React are primarily classified as "Web App Builders" and "Javascript UI Libraries" tools respectively.

Blazor and React are both open source tools. React with 132K GitHub stars and 24.5K forks on GitHub appears to be more popular than Blazor with 8.19K GitHub stars and 664 GitHub forks.

What is Blazor?

Blazor is a .NET web framework that runs in any browser. You author Blazor apps using C#/Razor and HTML.

What is React?

Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.

Want advice about which of these to choose?Ask the StackShare community!

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        What are some alternatives to Blazor and React?
        JavaScript
        JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.
        Google App Maker
        App Maker lets you develop powerful apps with relative ease. Create a model to manage your data, build a UI in the visual editor, use Apps Script to write some scripts, and you're on your way.
        Stamplay
        The API-based development platform enabling developers to do 80% of the job in 1% of the time thanks to: out of the box APIs for users and data, one-click integration with any API, scalable infrastructure and SDKs. Build Rome in a day.
        Backand
        Backand is a powerful backend-as-a-service for AngularJS that provides out-of-the-box social login, push notifications, Ionic integration and much more.
        Knack
        Build simple web apps like a member directory, job listings, employee time tracking, business directory, contact directory, product catalogue, or equipment tracker.
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        How developers use Blazor and React
        Avatar of Instacart
        Instacart uses ReactReact

        Before two weeks ago or so, it used to be Backbone views and models, and everything was on our main store app, and our mobile web app, but actually, we just switched our mobile web app to using ReactJS for the interface. So it’s using Backbone models but ReactJS front-end components. Really, it was borne out of the frustration with how the Backbone model-view bindings worked, and it wasn’t especially performant for large views, and we had to do lots of tricks to make it performant. But swapping that out with React views meant that it could be both simpler and faster without having to spend a lot of time on that.

        One other interesting thing about that is, since React actually works okay with the Backbone models and the Backbone router and stuff like that, we didn’t have to rewrite the mobile web application and update it to ReactJS. Rewrites are almost always a bad idea. We were able to upgrade pieces of it at a time, move on to React, and now the entire thing is using React and just has the Backbone router and models and stuff like that that we already had, so it's a lot faster.

        Avatar of Netflix
        Netflix uses ReactReact

        At the beginning of last year, Netflix UI engineers embarked on several ambitious projects to dramatically transform the user experience on our desktop and mobile platforms. Given a UI redesign of a scale similar to that undergone by TVs and game consoles, it was essential for us to re-evaluate our existing UI technology stack and to determine whether to explore new solutions. Do we have the right building blocks to create best-in-class single-page web applications? And what specific problems are we looking to solve? Much of our existing front-end infrastructure consists of hand-rolled components optimized for the current website and iOS application. Our decision to adopt React was influenced by a number of factors, most notably: 1) startup speed, 2) runtime performance, and 3) modularity.

        React has exceeded our requirements and enabled us to build a tremendous foundation on which to innovate the Netflix experience.

        Avatar of Cloudcraft
        Cloudcraft uses ReactReact

        Web-frontend programming prior to React: like banging rocks together. With React: Like wearing fusion powered underwear. Gives you a nice warm feeling. Using React for Cloudcraft.co allowed us to create a beautiful UI in record time (1 month start to launch), with virtually no bugs popping up during development. The functional approach to just rendering your component given a state just makes so much sense, with React figuring out the delta between your current and desired representation. It's the future kids!

        Avatar of Kurzor, s.r.o.
        Kurzor, s.r.o. uses ReactReact

        React is choice number 1 when it comes to JS development at Kurzor. We choose React because it solves many issues with web applications in a elegant way. Writing an app in components is useful for coordination and isolation of concerns. React forces you to abandon state and use vertical passing through props instead. And having as many Pure Components as possible helps to write cleaner code.

        With React we usually use: Redux, React Router, React Toolbox, Styled Components.

        Avatar of Kent Steiner
        Kent Steiner uses ReactReact

        This is the best component framework and API available today for building modern web sites and apps. I really enjoy how minimal it is, and powerful at the same time. It removes opinionated development and replaces it with logic and data philosophies, which has in turn fostered a robust and lively code and support community.

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