Write apps like equations!
Code as simple and precise as Mathematical Expressions. Presto is written in PureScript harnessing the powers of Functional Programming & Category Theory. What you get is scalable, performant code with elegant abstractions. Our attempt with Presto is to really simplify the app development process.
Talk on Presto @FunctionalConf
Slides
Quickstart
You can get your hands dirty by building a mobile recharge app using Presto
git clone https://github.com/juspay/purescript-presto.git
cd purescript-presto/examples/billpay-react
npm i
bower i
npm start
Open http://localhost:8080/dist/ in your browser.
Code Snippet
billPayFlow :: Flow BillPayFailure StatusScreenAction
billPayFlow = do
_ <- UI.splashScreen
operators <- Remote.fetchOperators
operator <- UI.chooseOperator operators
mobileNumber <- UI.askMobileNumber
amount <- UI.askAmount
result <- Remote.payBill mobileNumber amount operator
UI.billPayStatus mobileNumber amount result
See examples directory for more samples.
Examples
You can try out the below examples.
Learning Presto
Presto Guide makes it easy to get started and start building great apps very quickly. We are continually improving Presto's documentation and welcome suggestions of topics we could explain in greater detail. Please send an email to [email protected] with your requests.
Add Presto to your existing project
bower i purescript-presto
Apps in Production
BHIM - Payments App, 17 Million Total Users
JuspaySafe - Payments Browser, 800 Million Txns Processed
JuspayFuel - Payments Solution for Gas Stations, 1000s of Outlets
Community
Get updates on improvements to Presto and chat with the project maintainers and community members.
Join a discussion or start one at our forum or gitter channel.
Contributing
See the CONTRIBUTING.md file for details.