JavaScript is not C#

JavaScript is not C#
Brad Tutterow
www.codebadger.com
Swank Motion Pictures

Falsey values

Checking for false (C#)

Checking for false (JS)

Checking for null or empty (C#)

Checking for null or empty (JS)

Tip: Check for null by asking if the object is false

Default values (C#)

Default values (JS)

Comparingfalsey values (JS)

Comparing falsey values (C#)

Comparing falsey values (JS)

Tip: Use triple-equal to be clear that you really want things to be equal

The global namespace

The global namespace (JS)

Tip: Top-level variables live on the window object in the DOM

The global namespace (JS)

Tip: Always declare variables with the “var” keyword

Function scope

Function scope (JS)

Block scope (C#)

Block scope (JS)

Tip: Declare all of a function’s variables at the top of the function

Objects

Creating a new object (C#)

Creating a new object (JS)

Adding a method (C#)

Adding a method (JS)

Tip: JavaScript methods are properties that are assigned a function

Namespacing

Cluttering up the global namespace (JS)

Using an object literal (JS)

Using jQuery ready (JS)