E-Books →JavaScript Developer Concepts (JavaScript Elemental Literature (Official Book Series) 1)

Variables and data types: understanding how to declare and use variables, and being familiar with the different data types available in jаvascript (e.g. numbers, strings, booleans).
Control structures: understanding how to use control structures such as loops (e.g. for, while) and conditional statements (e.g. if, else) to control the flow of a program.
Functions: understanding how to define and use functions, including how to pass arguments and return values.
Objects and arrays: understanding how to work with objects and arrays, including how to access and modify their properties and elements.
DOM manipulation: understanding how to use jаvascript to manipulate the Document Object Model (DOM) in order to dynamically update a webpage.