When comparing Opa vs Mint, the Slant community recommends Opa for most people. In the question“What are the best languages that compile to JavaScript? ” Opa is ranked 30th while Mint is ranked 44th. The most important reason people chose Opa is:
Opa uses type inference to decide what code runs on the client or the server, so you can organize code how you like, but still be sure that it runs where it needs to.
Specs
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Pros
Pro Type Inferred
Opa uses type inference to decide what code runs on the client or the server, so you can organize code how you like, but still be sure that it runs where it needs to.
Pro Familiar Javascript Syntax
Opa's syntax is very similar to JavaScript, making it an easy choice for developers who are used to developing in JavaScript.
Pro Client and Server in the same language
Pro Writen in Crystal (Language)
Crystal is one of the best and elegant languages.
Pro Constructs for synchronous and asynchronous computations
Pro Easy to learn and write
Everything is an expression.
Pro HTML and CSS integration
HTML can be written with minimal differences.
Scoped .CSS can be written for elements in components.
Pro Good error support
200+ unique error messages to help you on the way.
Pro Everything is typed
Everything is typed using a simple type system
Pro Dead code elimination
Only used parts of the code compiles into the final bundle.
Pro Built-in formatter
Mint has a built-in formatter to format your code, it can run standalone or with the development server.
Pro Batteries included
Mint contains everything you need to build the frontend of web applications from styling to data storage through HTTP requests to testing.
Pro Integrated testing
Testing is part of the language and there is a test runner built in which runs tests in the browser.
Cons
Con Not popular
Opa is not as popular as other languages which compile to JavaScript. Making it harder to find learning resources or even answers if you get stuck somewhere.