Name Your Booleans Like A True Or False Question

[!INFO]-
topic: 🧹 Clean Code
links: Names in your code should be meaningful
source: Clean Code | Udemy
tags: #permanent-note #published

Last Modified: =dateformat(this.file.mtime, "MMM. dd, yyyy - HH:mm")

While your variable names should usually describe the value as clear as possible, your booleans should always be a question, which can be answered with yes or no. When in doubt, starting with is is often a good way.
Same goes for functions that compute a boolean.

isLoggedIn
isValid