One of the annoying thing in front-end development is managing long calculations in a browser. JavaScript does things synchronously, and when you want to do something, that needs time for execution, JavaScript resists. Here is an example of such long calculation. At first, I shall demonstrate synchronous code, then asynchronous. Scala has the great library Monix, that works well with Scala.js. I have already told about Monix in some of my previous posts. Of cause, I’m going to use this library in my asynchronous example. My son goes to school. One time he was doing his math homework and he

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