javascript-learning

My learning experience of javascript language.

This code is based on exercises from javascript.info and "Eloquent JavaScript" book by Marijn Haverbeke.

How to run script:

yarn run babel-node src/arrays.js

How to monitor flow via flow-watch: this will constantly monitor code for flow errors

yarn run flow-watch

How to run jest tests on every change:

yarn run jest --watchAll

Setup instructions

To create new javascript template project with babel support, flow typing and jest tests - use these yarn modules:

yarn add --dev @babel/core @babel/cli @babel/preset-flow
yarn add --dev @babel/node
yarn add --dev jest
yarn add --dev babel-jest babel-plugin-transform-flow-strip-types

What's the right way to write Jest tests verified with Flow? https://stackoverflow.com/a/50805762/2075157

1. Check jest version

npx jest -v

2. Install flow-typed

npx flow-typed install jest@24.9.0

3. Add flow-typed in .flowconfig file

...
[libs]
flow-typed
...