DEV Community

Mark Smith
Mark Smith

Posted on


My javascript / tech / web development newsletter for 2021-07-17 is out!

In this week’s edition:

Creativity and optimism in tech, general webdev chat, javascript engine implementors

Would love to hear any comments and feedback you have.


Top comments (0)


11 Tips That Make You a Better Typescript Programmer

1 Think in {Set}

Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.

#2 Understand declared type and narrowed type

One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.

#3 Use discriminated union instead of optional fields


Read the whole post now!