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AngularJS vs Flask: What are the differences?

Introduction:

AngularJS and Flask are both popular frameworks used for web development. AngularJS is a front-end JavaScript framework, while Flask is a back-end Python framework. Although they are used for web development, they have different features and purposes.

  1. Architecture and Language: One key difference between AngularJS and Flask is their architecture and the language they are built on. AngularJS is a full-fledged front-end framework that uses JavaScript as its primary language. It follows the Model-View-Controller (MVC) architecture and provides a complete solution for building dynamic web applications. On the other hand, Flask is a micro web framework that uses Python as its primary language. It follows the Model-View-Controller (MVC) pattern but is more lightweight and minimalistic, giving developers more flexibility in building web applications.

  2. Development Approach: Another difference between AngularJS and Flask is their development approach. AngularJS follows a declarative approach, where developers define what they want the application to do, and AngularJS takes care of the implementation details. It provides a set of declarative directives that allow developers to define the behavior of different elements in the application. Flask, on the other hand, follows an imperative approach, where developers have more control over the implementation details. Developers need to write explicit code to handle different aspects of the application.

  3. Client-side vs Server-side Rendering: AngularJS is a client-side rendering framework, which means that the HTML templates are rendered on the client-side by the browser. This allows for more interactivity and a smoother user experience. Flask, on the other hand, is a server-side rendering framework, where the HTML templates are rendered on the server and then sent to the client. This approach is more suitable for applications that don't require a lot of interactivity and are more focused on delivering content.

  4. Dependencies and Ecosystem: AngularJS has a rich ecosystem and a wide range of built-in features and libraries. It provides a set of core modules and allows developers to easily add external modules to extend its functionality. Flask, on the other hand, has a smaller ecosystem and fewer built-in features. It is more lightweight and allows developers to choose and add only the necessary dependencies, resulting in a more efficient and optimized application.

  5. Learning Curve and Complexity: AngularJS has a steeper learning curve compared to Flask due to its extensive features and complex concepts like data binding, directives, and dependency injection. It requires a solid understanding of JavaScript and a good grasp of object-oriented programming concepts. Flask, being a lightweight framework, has a relatively lower learning curve and is easier to get started with, especially for developers with a background in Python.

  6. Scalability and Performance: AngularJS is designed to handle large-scale applications with complex features and high interactivity. It provides features like two-way data binding and dependency injection, which make it easier to manage complex application states. Flask, on the other hand, is more suitable for smaller or medium-sized applications where performance is a primary concern. Its lightweight nature and simplicity allow for faster response times and better performance overall.

In summary, AngularJS is a full-fledged front-end framework built on JavaScript with a declarative approach, client-side rendering, rich ecosystem, steeper learning curve, and better scalability. Flask is a lightweight back-end framework built on Python with an imperative approach, server-side rendering, smaller ecosystem, lower learning curve, and better performance for smaller applications.

Advice on AngularJS and Flask
kristan-dev
Senior Solutions Analyst · | 8 upvotes · 341.6K views

My journey to developing REST APIs started with Flask Restful, and I've found it to be enough for the needs of my project back then. Now that I've started investing more time on personal projects, I've yet to decide if I should move to use Django for writing REST APIs. I often see job posts looking for Python+Django developers, but it's usually for full-stack developers. I'm primarily interested in Data Engineering, so most of my web projects are back end.

Should I continue with what I know (Flask) or move on to Django?

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Replies (1)
Rafael Torres
Technical Lead at 4Agile · | 9 upvotes · 332.1K views

If you want to be a Web developer with knowledge in another frontend and NoSql technology, maybe continue with Flask. However, if you want to create very fast solutions to grow up with a new business and merge these with data analysis and other tools, Django is the answer. Basically read more about the service architecture where you feel more comfortable, Microservice or Monolithic, but please will not married with any because they solve issues to different contexts.

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Needs advice
on
AngularJSAngularJSReactReact
and
Vue.jsVue.js

What is the best MVC stack to build mobile-friendly, light-weight, and fast single-page application with Spring Boot as back-end (Java)? Is Bootstrap still required to front-end layer these days?

The idea is to host on-premise initially with the potential to move to the cloud. Which combo would have minimal developer ramp-up time and low long-term maintenance costs (BAU support)?

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Replies (3)
Carolyne Stopa
Full Stack Developer at Contabilizei · | 10 upvotes · 559.3K views
Recommends
on
Vue.jsVue.js

React might be a good option if you're considering a mobile app for the future, because of react native. Although, Vue.js has the easiest learning curve and offers a better developer ramp-up time. Vue.js is great to build SPAs, very clean and organized and you won't have a lot of long-term maintenance problems (like AngularJS, for example). Bootstrap can still be used, but with flexbox there's no need anymore.

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Chaitanya Chunduri
Recommends
on
ReactReact

I recommend React because of less memory occupant compare to Angular, but this will depend on your organisation flexibility. When you use React you need to import different libraries as per your need. On the other side angular is a complete framework.

Performance-wise I vote for react js as it loads up quickly and lighter on the mobile. You can make good PWA with SSR as well.

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Recommends
on
ReactReact

If you are new to all three react will be a good choice considering, react-native will be useful if you want to build cross platform mobile application today or tomorrow. If you are talking about bootstrap styling framework than it's a choice you can style ur components by ur self or use bootstrap 4.0 framework. The complete stack mentioned above is platform agnostic u can run it anywhere you want be it cloud or on-premise.

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Girish Sharma
Software Engineer at FireVisor Systems · | 6 upvotes · 270.7K views
Needs advice
on
BottleBottleFlaskFlask
and
NamekoNameko

Which is the best Python framework for microservices?

We are using Nameko for building microservices in Python. The things we really like are dependency injection and the ease with which one can expose endpoints via RPC over RabbitMQ. We are planning to try a tool that helps us write polyglot microservices and nameko is not super compatible with it. Also, we are a bit worried about the not so good community support from nameko and looking for a python alternate to write microservices.

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Replies (1)
Recommends
on
BottleBottle

Bottle is much less bloated and fast. Its built-in templating system is one of the fastest as it compiles the templates in bytecode. Also Bottle has no depenencies, preventing dependency bloat.

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Saurav Pandit
Application Devloper at Bny Mellon · | 6 upvotes · 287.1K views

I have just started learning Python 3 weeks ago. I want to create a REST API using python. The API will be used to save form data in an Oracle database. The front end is using AngularJS 8 with Angular Material. In python, there are so many frameworks to develop REST APIs.

I am looking for some suggestions which REST framework to choose?

Here are some features I am looking for:

  • Easy integration and unit testing, like in Angular. We just want to run a command.

  • Code packaging, like in java maven project we can build and package. I am looking for something which I can push in as an artifact and deploy whole code as a package.

  • Support for swagger/ OpenAPI

  • Support for JSON Web Token

  • Support for test case coverage report

Framework can have features included or can be available by extension. Also, you can suggest a framework other than the ones I have mentioned.

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Replies (1)
Recommends
on
FlaskFlask
at

For starters flask provides a beautiful and easy way to create REST APIs. Also its supported by excellent beginner docs as well as a very active community. Another good thing with Flask is its widely available list of plugins which allow you to build as you go. Its also good in performance and can scale to a quite decent level. However, if you are sure your project is going to be fairly big, it would be better to start with Django as it provides a lot of features out of the box and is extremely stable in performance. Both these frameworks have support for Swagger, JWT, Coverage Report although you have to install plugins for them. Deploying both of these are fairly simple and there is huge documentation available. Django has one of the best documentations I have come across. I hope I was able to answer your queries.

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Decisions about AngularJS and Flask
neha menahil

Have you ever stuck with the question that which one is the best front-end framework for you?

With continuous web development progress, the trends of the latest front-end technologies are also continuously changing with more and more sophisticated web features. These top front-end frameworks and libraries have made your complex web tasks more flexible and efficient.

Check out top front end frameworks and their features at https://www.nmtechedge.com/2020/09/24/top-4-trending-front-end-frameworks-2020/

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Peter Schmalfeldt
Senior Software Engineer · | 5 upvotes · 153.6K views

I honestly think the best choice for which framework you use should come down to your team's skills. If you have one Senior Dev that is great at React, but like 3-4 mid-level devs, and a handful of junior devs that know Vue.js ... maybe look at using Vue.js a little more seriously.

Yes, there are pros and cons to framework decisions, but I honestly see a LOT of teams not even consider whether a specific framework is a good fit.

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Peter Schmalfeldt
Senior Software Engineer · | 4 upvotes · 145.1K views

I honestly think the best choice for which framework you use should come down to your team's skills. If you have one Senior Dev that is great at React, but like 3-4 mid-level devs, and a handful of junior devs that know Angular ... maybe look at using Angular a little more seriously.

Yes, there are pros and cons to framework decisions, but I honestly see a LOT of teams not even consider whether a specific framework is a good fit.

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Kamaleshwar BN
Senior Software Engineer at Pulley · | 10 upvotes · 613K views

It was easier to find people who've worked on React than Vue. Angular did not have this problem, but seemed way too bloated compared to React. Angular also brings in restrictions working within their MVC framework. React on the other hand only handles the view/rendering part and rest of the control is left to the developers. React has a very active community, support and has lots of ready-to-use plugins/libraries available.

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José Oberto
Head of Engineering & Development at Chiper · | 14 upvotes · 532.5K views

It is a very versatile library that provides great development speed. Although, with a bad organization, maintaining projects can be a disaster. With a good architecture, this does not happen.

Angular is obviously powerful and robust. I do not rule it out for any future application, in fact with the arrival of micro frontends and cross-functional teams I think it could be useful. However, if I have to build a stack from scratch again, I'm left with react.

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John Clifford de Vera
Software Engineer at CircleYY · | 21 upvotes · 401.3K views

I used React not just because it is more popular than Angular. But the declarative and composition it gives out of the box is fascinating and React.js is just a very small UI library and you can build anything on top of it.

Composing components is the strongest asset of React for me as it can breakdown your application into smaller pieces which makes it easy to reuse and scale.

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Dennis Ziolkowski
Migrated
from
AngularJSAngularJS
to
AngularAngular

I was first sceptical about using Angular over AngularJS. That's because AngularJS was so easy to integrate in existing websites. But building apps from scratch with Angular is so much easier. Of course, you have to build and boilerplate them first, but after that - you save a ton of time. Also it's very cozy to write code in TypeScript.

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Simon Reymann
Senior Fullstack Developer at QUANTUSflow Software GmbH · | 23 upvotes · 4.7M views

Our whole Vue.js frontend stack (incl. SSR) consists of the following tools:

  • Nuxt.js consisting of Vue CLI, Vue Router, vuex, Webpack and Sass (Bundler for HTML5, CSS 3), Babel (Transpiler for JavaScript),
  • Vue Styleguidist as our style guide and pool of developed Vue.js components
  • Vuetify as Material Component Framework (for fast app development)
  • TypeScript as programming language
  • Apollo / GraphQL (incl. GraphiQL) for data access layer (https://apollo.vuejs.org/)
  • ESLint, TSLint and Prettier for coding style and code analyzes
  • Jest as testing framework
  • Google Fonts and Font Awesome for typography and icon toolkit
  • NativeScript-Vue for mobile development

The main reason we have chosen Vue.js over React and AngularJS is related to the following artifacts:

  • Empowered HTML. Vue.js has many similar approaches with Angular. This helps to optimize HTML blocks handling with the use of different components.
  • Detailed documentation. Vue.js has very good documentation which can fasten learning curve for developers.
  • Adaptability. It provides a rapid switching period from other frameworks. It has similarities with Angular and React in terms of design and architecture.
  • Awesome integration. Vue.js can be used for both building single-page applications and more difficult web interfaces of apps. Smaller interactive parts can be easily integrated into the existing infrastructure with no negative effect on the entire system.
  • Large scaling. Vue.js can help to develop pretty large reusable templates.
  • Tiny size. Vue.js weights around 20KB keeping its speed and flexibility. It allows reaching much better performance in comparison to other frameworks.
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Julius alvarado

It is a complete waste of time and life to learn a different framework to solve the same problem (Both AngularJS and Angular build A+ UI's, but both require a lot of time to learn). It's dumb to spend 200 hours learning AngularJS, then 200 hours learning Angular when you could spend 200 hours learning AngularJS and 200 hours learning how to solve a different problem (like AI/ML, Data Science, AR/VR, Digital Marketing, etc.)

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Jonas Stendahl

React has by far and away been our most important library choice throughout the history of Sellpy. It is a library that offers great flexibility supported by a really strong core. The React team is doing incredible work bringing quality features to the core project and tons of quality third party libraries fill in the gaps.

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Pros of AngularJS
Pros of Flask
  • 889
    Quick to develop
  • 589
    Great mvc
  • 573
    Powerful
  • 520
    Restful
  • 505
    Backed by google
  • 349
    Two-way data binding
  • 343
    Javascript
  • 329
    Open source
  • 307
    Dependency injection
  • 197
    Readable
  • 75
    Fast
  • 65
    Directives
  • 63
    Great community
  • 57
    Free
  • 38
    Extend html vocabulary
  • 29
    Components
  • 26
    Easy to test
  • 25
    Easy to learn
  • 24
    Easy to templates
  • 23
    Great documentation
  • 21
    Easy to start
  • 19
    Awesome
  • 18
    Light weight
  • 15
    Angular 2.0
  • 14
    Efficient
  • 14
    Javascript mvw framework
  • 14
    Great extensions
  • 11
    Easy to prototype with
  • 9
    High performance
  • 9
    Coffeescript
  • 8
    Two-way binding
  • 8
    Lots of community modules
  • 8
    Mvc
  • 7
    Easy to e2e
  • 7
    Clean and keeps code readable
  • 6
    One of the best frameworks
  • 6
    Easy for small applications
  • 5
    Works great with jquery
  • 5
    Fast development
  • 4
    I do not touch DOM
  • 4
    The two-way Data Binding is awesome
  • 3
    Hierarchical Data Structure
  • 3
    Be a developer, not a plumber.
  • 3
    Declarative programming
  • 3
    Typescript
  • 3
    Dart
  • 3
    Community
  • 2
    Fkin awesome
  • 2
    Opinionated in the right areas
  • 2
    Supports api , easy development
  • 2
    Common Place
  • 2
    Very very useful and fast framework for development
  • 2
    Linear learning curve
  • 2
    Great
  • 2
    Amazing community support
  • 2
    Readable code
  • 2
    Programming fun again
  • 2
    The powerful of binding, routing and controlling routes
  • 2
    Scopes
  • 2
    Consistency with backend architecture if using Nest
  • 1
    Fk react, all my homies hate react
  • 14
    Flexibilty
  • 10
    For it flexibility
  • 9
    Flexibilty and easy to use
  • 8
    Flask
  • 7
    User friendly
  • 6
    Secured
  • 5
    Unopinionated
  • 3
    Orm
  • 2
    Secure
  • 1
    Beautiful code
  • 1
    Easy to get started
  • 1
    Easy to develop and maintain applications
  • 1
    Not JS
  • 1
    Easy to use
  • 1
    Documentation
  • 1
    Python
  • 1
    Minimal
  • 1
    Lightweight
  • 1
    Easy to setup and get it going
  • 1
    Perfect for small to large projects with superb docs.
  • 1
    Easy to integrate
  • 1
    Speed
  • 1
    Get started quickly
  • 1
    Customizable
  • 1
    Simple to use
  • 1
    Powerful
  • 1
    Rapid development
  • 0
    Open source
  • 0
    Well designed
  • 0
    Productive
  • 0
    Awesome
  • 0
    Expressive
  • 0
    Love it

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Cons of AngularJS
Cons of Flask
  • 12
    Complex
  • 3
    Event Listener Overload
  • 3
    Dependency injection
  • 2
    Hard to learn
  • 2
    Learning Curve
  • 10
    Not JS
  • 7
    Context
  • 5
    Not fast
  • 1
    Don't has many module as in spring

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What is AngularJS?

AngularJS lets you write client-side web applications as if you had a smarter browser. It lets you use good old HTML (or HAML, Jade and friends!) as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. It automatically synchronizes data from your UI (view) with your JavaScript objects (model) through 2-way data binding.

What is Flask?

Flask is intended for getting started very quickly and was developed with best intentions in mind.

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What are some alternatives to AngularJS and Flask?
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.
Angular
It is a TypeScript-based open-source web application framework. It is a development platform for building mobile and desktop web applications.
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.
Node.js
Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
jQuery
jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML.
See all alternatives