Quick Cheatsheet on some Javascript Basics

1) Global objects can be accessed via this operator in javascript.

2) Global properties that return a simple value and have no methods are:
Infinity, NaN, undefined, null

3) How to create a variable:
var myNameVariable = ‘name1’;
//Re-assigning the value:
myNameVariable = ‘name2’;

4) Primitive data types that are supported in Javascript are:
Boolean, Null, Undefined, Number, String, Symbol, Object

• Boolean type can take true or false
• Null can take exactly one value: null
• Integers are 16-bit unsigned integer values
• Object: It's like an object oriented programming concept of object.

5) Comments: Following are 2 types of creating comments.

• /* */
• //

6) Mathematical operators:

• add/concatenation: +
• subtract: -
• multiple: * 
• divide: /
• assignment operator: =
• Identity Operator: ===
• Negation: !
• Not equal: !==

7) How to define a function
function testFunc() {
alert(“Test”);
}