JavaScript Cheatsheet

Hover over the cards

HTML

  • De facto programing language of the web.

  • Adds interactivity to your website.

  • Versatile and beginner-friendly.

Fundamentals

  • JavaScript programs can be inserted into an HTML document using the script tag

  • Variables store values. You declare a variable with the let keyword, followed by the name you give to the variable

  • A semicolon at the end of a line indicates where a statement ends.

Arrays

  • An array is a special variable, which can hold more than one value

  • JavaScript arrays are resizable and can contain a mix of different data types.

  • JavaScript arrays are zero-indexed: the first element of an array is at index 0

Loops

  • Loops offer a quick and easy way to do something repeatedly

  • There are many different kinds of loops, but they all essentially do the same thing

  • The various loop mechanisms offer different ways to determine the start and end points of the loop

Functions

  • A function is a block of code designed to perform a particular task

  • A function is executed when "something" invokes it (calls it).

  • A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses ().

ES6

  • JavaScript ES6 is the newer version of JavaScript that was introduced in 2015

  • ES6 stands for ECMAScript 6

  • Some features are: Let,Const,Default Paramaters, Template Literals,Arrow Functions, Promises,Destructuring