Spring cleaning: how to safely remove dead code (unused exports) in JS codebase
Reading Time: 2 minutes There is no visible harm in having code in the code base, that is never used. Previously this at least would affect bundle size by incr...
Category: JavaScript
Flow: $Values for tuple (array) type
Reading Time: < 1 minute With the flow, we have convenient way to check does value has the same type as value sof the object type, by using $Values: Open ...
Algorithms in the wild: Cartesian product & generating cases for end-to-end testing
Reading Time: < 1 minute Recently I was writing Cypress tests for media query functionality that we have in the Webflow. One of the features that I wanted t...
Flow best practices
Reading Time: 12 minutes Current, Flow is not released even in version 1.0.0, but it is already flexible enough to allow creation type systems in different way...
Flow: Object.assign vs spreading
Reading Time: < 1 minute Recently I ran into an interesting example of how the flow is interpreting the values without the provided defined type.
Visualizing sorting algorithms
Reading Time: 2 minutes Currently, I am going through course JavaScript Algorithms and Data Structures (which I highly recommend by the way). For me, one of th...
Inexact vs exact flow object types: spreading
Reading Time: 3 minutes If one wants to add flow annotation to object type and reuse some of the types, that was annotated in another object type, it can be do...
Debugging tips – console.trace
Reading Time: < 1 minute From my observation, debugging is the best-kept secret of the developer life. Everyone is doing quite often, some are doing it even...
What I have learned from the Kent C. Dodds testing JavaScript course
Reading Time: 4 minutes The strange thing is happening when one is gaining more experience – it is harder to identify or to find what new to learn. It de...
How to add flow type definition for raw-loader
Reading Time: 3 minutes Recently I have encountered a quite odd problem. I was trying to load *.html file as a string in my React component using raw-loader , ...