summarizing the famous interface-building JavaScript library

freezing objects to make them

using optional shorthand ways to write if/else statements

using optional shorthand ways to write if/else statements

concatenating strings with variables in a neater arrangement

employing special workarounds for special cases of strings

using other people's data sets with this function

listening and responding to events (happenings)

accessing the HTML via JavaScript

more about JavaScript with the "user agent"

reviewing this calculation-oriented built-in object

reviewing this calendar-oriented built-in object

making changes to the HTML with JavaScript

responding to unsatisfactory data and actions

delaying and repeating events based on time

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 in JavaScript

making decisions between or among conditions

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

using the browser's console as a code playground

documenting code with some comments and whitespace