checking the validity of JavaScript types with this library

delaying and repeating events based on time

making changes to the HTML with JavaScript

accessing the HTML via JavaScript

more about JavaScript with the "user agent"

containing chunks of code for later re-use

performing more powerful functions such as transforming and filtering arrays

collecting several items in one container

collecting properties and values into containers

grouping code into actionable chunks

making events happen again and again

making decisions with if and else statements

reviewing essential math + logic + beyond

differentiating const + let + var when declaring variables

storing data into named containers

looking at and manipulating numbers in JavaScript

looking at and manipulating plain text in JavaScript

summarizing the building blocks of web app data