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Tag Archives: guide

Window Object – Advanced JavaScript Tutorial

Window Object

There’s one object to rule them all. That is the global object. Every variable, object and function is part of the global object. The global object can’t be accessed directly. However, most JavaScript host environments create an object that act as the global object. For browsers, this is known as the window object. Let’s take a look at how the …

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Closures – Advanced JavaScript Tutorial

Closures

Closures allow you to take your JavaScript skills to the next level. Closures are used in almost every JavaScript code you’ve ever seen. You’ve probably ended up using it without knowing it. So, what are closures? A closure is a function inside a function. So, what’s so special about this? Well, you can actually access the variables outside of the …

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Recursive Functions – Advanced JavaScript Tutorial

Recursive Functions

We’re going to stop talking about object oriented programming for now. Let’s focus on functions. There’s a thing called recursive functions. It’s just a function that calls on itself until a condition has been met. Almost like a loop. Setting Up The Script Clear your script and add this bit of code. [crayon-5a0f4ceb8281d520692338/] If you don’t know what factorials are, …

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Inheritance – Advanced JavaScript Tutorial

Inheritance

Another advantage to using prototypes is that you can have inheritance in your scripts. What is inheritance? Well, first let me show you and then I’ll explain. Clear your script and add this bit of code. [crayon-5a0f4ceb82e35924316599/] Alright, let’s break this done. We have 2 objects. One is BankAccount and the other is SavingsAccount. We add a method to the …

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Prototypes – Advanced JavaScript Tutorial

Prototypes

Prototypes are a must know for any JavaScript developer. As you may know, JavaScript is classless. Instead, it uses prototypes. However, this subject confuses a lot of people.  In this tutorial, we’ll go more in-depth of what prototypes are. First, we’ll learn how to use them and then why you should use them. Clear your script and add this bit …

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Object Oriented Programming – Advanced JavaScript Tutorial

Object Oriented Programming

Object oriented programming in JavaScript is different than most programming languages. JavaScript has no acknowledgement of classes. All properties and methods inside an object are just name-value pairs. We’ve discussed object oriented programming before in the JavaScript beginner tutorial series. Now, we’ll go more in-depth of what OOP is. They way we’ve been writing code is what’s called procedural code. …

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Array Methods – Advanced JavaScript Tutorial

Array Methods

If you’ve seen my beginner JavaScript tutorials, then you already know about arrays. In this tutorial, we’ll discus a couple of handy array methods for iterating through arrays. Iterative Methods As you may know, the for in loop is a great way to loop through all the items in an array. However, arrays come with 5 methods for looping through …

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Garbage Collection – Advanced JavaScript Tutorial

Garbage Collection

It’s time to take out the trash! No, not the one in your home. I’m talking about the one in your programs. For every object you create, you take up memory in the visitor’s computer. It isn’t just in some imaginary storage. JavaScript will free up space when you have objects that are no longer in use. This is what’s …

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Converting Data Types – Advanced JavaScript Tutorial

Converting Data Types

As you may know, each value has a data type. Since JavaScript supports dynamic datatypes you can change a value’s data type like so. [crayon-5a0f4ceb85f73065184932/] In some situations, you’ll want to convert the value to another data type instead of just changing the value. JavaScript offers a variety of functions and methods to do so. Let’s set up things to …

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Script Tag – Advanced JavaScript Tutorial

Script Tag

The script tag is how you include JavaScript into your document. However, there are a couple more things to know that can really optimize the performance of your site. Script Tag Attributes As you already know, placing your scripts at the bottom of your document allows everything else to load first before you start dynamically updating content. There’s another technique …

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