This is a draft cheat sheet. It is a work in progress and is not finished yet.
JavaScript Basics
Including JavaScript in an HTML Page |
<script type="text/javascript">
//JS code goes here
</script> |
Call an External JavaScript File |
<script src="myscript.js"></script><code></code> |
Including Comments |
// comment here : Single line comments
/* comment here */ : Multi-line comments |
Variables in JavaScript
var, const, let : |
var : The most common variable. Can be reassigned but only accessed within a function. Variables defined with var move to the top when code is executed. |
const : Can not be reassigned and not accessible before they appear within the code. |
let : Similar to const, however, let variable can be reassigned but not re-declared |
Data Types : |
var age = 23 : Numbers
var x : Variables
var a = "init" : Text (strings)
var b = 1 + 2 + 3 : Operations
var c = true : True or fase statements
const PI = 3.14 : Constant numbers
|
Objects : |
// Example 1
var name = {firstName:"John", lastName:”Doe"}
// Example 2
var person = {
firstName:"John",{
lastName:"Doe",{
age:20,{
nationality:"German"
}; |
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