⚡EXTENDED THRU DEC 10⚡ Cyber November Sale 50% off any plan for 6 months, exclusive to new subscribers.

Join the Treehouse affiliate program and earn 25% recurring commission!

Joseph Knoll

Member Since March 15, 2013

20,481

Total Points

•
5,881

JavaScript

5881 pts
Achievements

0 pts
Forum
•
5,425

CSS

5425 pts
Achievements

0 pts
Forum
•
2,923

HTML

2923 pts
Achievements

0 pts
Forum
•
975

Java

975 pts
Achievements

0 pts
Forum
•
927

PHP

927 pts
Achievements

0 pts
Forum
•
747

Development Tools

747 pts
Achievements

0 pts
Forum
•
247

Design

247 pts
Achievements

0 pts
Forum
•
228

Professional Growth

228 pts
Achievements

0 pts
Forum
•
40

Digital Literacy

40 pts
Achievements

0 pts
Forum
•
1

AI

1 pts
Achievements

0 pts
Forum

Points are earned whenever you take an important action on Treehouse.
Learn more about when and how points are earned.

236 Achievements

Achievement
Gotchas and Wins

Java Arrays (2017)

Achieved
Apr 24, 2025
Achievement
Iteration

Java Arrays (2017)

Achieved
Apr 23, 2025
Achievement
Delivering the MVP

Java Objects

Achieved
Apr 23, 2025
Achievement
Creating the MVP

Java Objects

Achieved
Apr 16, 2025
Achievement
Creation

Java Arrays (2017)

Achieved
Feb 29, 2024
Achievement
Harnessing the Power of Objects

Java Objects

Achieved
Feb 29, 2024
Achievement
Meet Objects

Java Objects

Achieved
Feb 5, 2024
Achievement
Perfecting the Prototype

Java Basics (2014)

Achieved
May 28, 2023
Achievement
Using your New Tools

Java Basics (2014)

Achieved
May 28, 2023
Achievement
Getting Started with Java

Java Basics (2014)

Achieved
May 28, 2023
Achievement
Exploration

Web Design Process

Achieved
May 28, 2023
Achievement
Discovery

Web Design Process

Achieved
May 28, 2023
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
May 28, 2023
Achievement
Exploring Async/Await

Asynchronous Programming with JavaScript

Achieved
May 27, 2023
Achievement
Understanding Promises

Asynchronous Programming with JavaScript

Achieved
May 27, 2023
Achievement
Asynchronous JavaScript with Callbacks

Asynchronous Programming with JavaScript

Achieved
May 26, 2023
Achievement
What is Asynchronous Programming?

Asynchronous Programming with JavaScript

Achieved
May 25, 2023
Achievement
Programming AJAX

AJAX Basics

Achieved
May 25, 2023
Achievement
AJAX Concepts

AJAX Basics

Achieved
May 22, 2023
Achievement
Captioning Video

HTML Video and Audio

Achieved
May 22, 2023
Achievement
Combine and Minify Assets

Introduction to Front End Performance Optimization

Achieved
Nov 6, 2022
Achievement
Optimize Assets

Introduction to Front End Performance Optimization

Achieved
Oct 31, 2022
Achievement
Getters and Setters

Object-Oriented JavaScript

Achieved
Oct 31, 2022
Achievement
Working with Classes in JavaScript

Object-Oriented JavaScript

Achieved
Oct 31, 2022
Achievement
Object Basics

Object-Oriented JavaScript

Achieved
Oct 31, 2022
Achievement
Introduction to Object-Oriented JavaScript

Object-Oriented JavaScript

Achieved
Jun 20, 2022
Achievement
Making Changes to the DOM

JavaScript and the DOM

Achieved
May 30, 2022
Achievement
Getting a Handle on the DOM

JavaScript and the DOM

Achieved
May 28, 2022
Achievement
The Browser Environment

JavaScript and the DOM

Achieved
May 28, 2022
Achievement
Traversing the DOM

Interacting with the DOM

Achieved
May 28, 2022
Achievement
Mobile-First CSS Layout

Mobile-First CSS Layout

Achieved
Apr 3, 2022
Achievement
Finishing Touches

Enhancing Design with CSS

Achieved
Mar 27, 2022
Achievement
Styling Images

Enhancing Design with CSS

Achieved
Mar 27, 2022
Achievement
Styling Boxes

Enhancing Design with CSS

Achieved
Mar 27, 2022
Achievement
Styling Text

Enhancing Design with CSS

Achieved
Mar 27, 2022
Achievement
CSS Media Queries

CSS Layout

Achieved
Mar 27, 2022
Achievement
CSS Layout Techniques

CSS Layout

Achieved
Mar 27, 2022
Achievement
Box Model Concepts

CSS Layout

Achieved
Mar 27, 2022
Achievement
The CSS Box Model

CSS Layout

Achieved
Mar 27, 2022
Achievement
Fundamental Concepts

CSS Basics

Achieved
Mar 26, 2022
Achievement
Understanding Values and Units

CSS Basics

Achieved
Mar 26, 2022
Achievement
Basic Selectors

CSS Basics

Achieved
Mar 26, 2022
Achievement
Getting Started with CSS

CSS Basics

Achieved
Mar 26, 2022
Achievement
Measuring Performance

Introduction to Front End Performance Optimization

Achieved
Mar 4, 2021
Achievement
Planning for Performance

Introduction to Front End Performance Optimization

Achieved
Mar 3, 2021
Achievement
Going Further with Grid Layout

CSS Grid Layout

Achieved
Mar 3, 2021
Achievement
Flexible Sized Grids

CSS Grid Layout

Achieved
Feb 23, 2021
Achievement
Introducing Grid Layout

CSS Grid Layout

Achieved
Jan 18, 2021
Achievement
Building Forms With Bootstrap

Bootstrap Basics

Achieved
Jan 16, 2021
Achievement
Using Bootstrap Components

Bootstrap Basics

Achieved
Jan 16, 2021
Achievement
Responsive Layouts With the Bootstrap Grid

Bootstrap Basics

Achieved
Jan 16, 2021
Achievement
Build an Accessible Form

Accessibility For Web Developers

Achieved
Jan 10, 2021
Achievement
Introduction To Accessibility

Accessibility For Web Developers

Achieved
Jan 10, 2021
Achievement
Media Basics

HTML Video and Audio

Achieved
Sep 25, 2020
Achievement
Getting to Know Bootstrap 4

Bootstrap Basics

Achieved
Sep 23, 2020
Achievement
Traversing the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 22, 2020
Achievement
Responding to User Interaction

Interacting with the DOM

Achieved
Sep 21, 2020
Achievement
Making Changes to the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 20, 2020
Achievement
Getting a Handle on the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 19, 2020
Achievement
Loop Through Objects

JavaScript Objects

Achieved
Sep 12, 2020
Achievement
Object Basics

JavaScript Objects

Achieved
Sep 12, 2020
Achievement
Multidimensional Arrays

JavaScript Arrays

Achieved
Sep 12, 2020
Achievement
Loop Through Arrays

JavaScript Arrays

Achieved
Sep 11, 2020
Achievement
Store Multiple Values in an Array

JavaScript Arrays

Achieved
Sep 11, 2020
Achievement
Working with 'for' Loops

JavaScript Loops

Achieved
Sep 11, 2020
Achievement
Simplify Repetitive Tasks with Loops

JavaScript Loops

Achieved
Sep 11, 2020
Achievement
The Browser Environment

JavaScript and the DOM (Retiring)

Achieved
Apr 28, 2020
Achievement
Advanced Selectors

CSS Selectors

Achieved
Apr 25, 2020
Achievement
Going Further with Attribute Selectors and Pseudo-Classes

CSS Selectors

Achieved
Apr 15, 2020
Achievement
GitHub and Other Remote Repositories

Introduction to Git

Achieved
Apr 15, 2020
Achievement
Managing Committed Files

Introduction to Git

Achieved
Apr 13, 2020
Achievement
First Commits

Introduction to Git

Achieved
Apr 12, 2020
Achievement
Building a Layout with Flexbox

CSS Flexbox Layout

Achieved
Apr 12, 2020
Achievement
Flexbox Properties

CSS Flexbox Layout

Achieved
Apr 7, 2020
Achievement
Understanding Flexbox

CSS Flexbox Layout

Achieved
Apr 4, 2020
Achievement
Arrow Functions

JavaScript Functions

Achieved
Apr 1, 2020
Achievement
Pass Information Into Functions

JavaScript Functions

Achieved
Mar 28, 2020
Achievement
Create Reusable Code with Functions

JavaScript Functions

Achieved
Mar 26, 2020
Achievement
The Math Object

JavaScript Numbers

Achieved
Mar 26, 2020
Achievement
Working with Numbers

JavaScript Numbers

Achieved
Mar 26, 2020
Achievement
Making Decisions in Your Code with Conditional Statements

JavaScript Basics

Achieved
Mar 23, 2020
Achievement
Working With Strings

JavaScript Basics

Achieved
Mar 22, 2020
Achievement
Storing and Tracking Information with Variables

JavaScript Basics

Achieved
Mar 22, 2020
Achievement
Hello, JavaScript!

JavaScript Basics

Achieved
Mar 17, 2020
Achievement
Responsive Patterns

Responsive Layouts

Achieved
Mar 17, 2020
Achievement
Media Queries

Responsive Layouts

Achieved
Mar 17, 2020
Achievement
Responsive Theory

Responsive Layouts

Achieved
Mar 17, 2020
Achievement
Positioning Page Content

CSS Layout Basics

Achieved
Jan 2, 2020
Achievement
Going Further with HTML

HTML Basics

Achieved
Sep 15, 2019
Achievement
Images, Text and Links

HTML Basics

Achieved
Sep 15, 2019
Achievement
Structuring Your Content

HTML Basics

Achieved
Sep 13, 2019
Achievement
Getting Started With HTML

HTML Basics

Achieved
Sep 13, 2019
Achievement
PHP Includes

Build a Basic PHP Website (2018)

Achieved
Jun 22, 2017
Achievement
PHP Internal Functions

PHP Functions

Achieved
Jun 16, 2017
Achievement
PHP Returns & Closures

PHP Functions

Achieved
Jun 15, 2017
Achievement
PHP Functions Basics

PHP Functions

Achieved
May 17, 2017
Achievement
PHP Loops

PHP Arrays and Control Structures

Achieved
May 11, 2017
Achievement
PHP Arrays

PHP Arrays and Control Structures

Achieved
May 9, 2017
Achievement
PHP Conditionals

PHP Arrays and Control Structures

Achieved
May 8, 2017
Achievement
PHP on the Web

PHP Basics

Achieved
May 8, 2017
Achievement
Daily Exercise Program

PHP Basics

Achieved
May 7, 2017
Achievement
Unit Converter

PHP Basics

Achieved
May 7, 2017
Achievement
Getting to Know PHP

PHP Basics

Achieved
May 7, 2017
Achievement
Adding a New Web Page

Introduction to HTML and CSS (2016)

Achieved
May 7, 2017
Achievement
Make It Beautiful with CSS

Introduction to HTML and CSS (2016)

Achieved
May 7, 2017
Achievement
HTML: The Structural Foundation of Web Pages and Applications

Introduction to HTML and CSS (2016)

Achieved
May 5, 2017
Achievement
Getting Familiar with HTML and CSS

Introduction to HTML and CSS (2016)

Achieved
May 5, 2017
Achievement
CSS Layout Project

CSS Layout Basics

Achieved
Nov 21, 2015
Achievement
Page Layout with the Float Property

CSS Layout Basics

Achieved
Nov 15, 2015
Achievement
Controlling Layout with CSS Display Modes

CSS Layout Basics

Achieved
Nov 14, 2015
Achievement
Getting Started with CSS Layout

CSS Layout Basics

Achieved
Nov 14, 2015
Achievement
Selectors - Beyond the Basics

CSS Selectors

Achieved
Nov 6, 2015
Achievement
Programming AJAX

AJAX Basics (retiring)

Achieved
Mar 5, 2015
Achievement
AJAX Concepts

AJAX Basics (retiring)

Achieved
Mar 4, 2015
Achievement
Custom Media Players

HTML Video and Audio (Retired)

Achieved
Mar 3, 2015
Achievement
Captioning Video

HTML Video and Audio (Retired)

Achieved
Mar 3, 2015
Achievement
Media Basics

HTML Video and Audio (Retired)

Achieved
Mar 3, 2015
Achievement
Structuring Tables

HTML Tables

Achieved
Mar 3, 2015
Achievement
Table Basics

HTML Tables

Achieved
Mar 3, 2015
Achievement
Creating a Simple Drawing Application

jQuery Basics (2014)

Achieved
Mar 3, 2015
Achievement
Creating a Password Confirmation Form

jQuery Basics (2014)

Achieved
Mar 3, 2015
Achievement
Creating a Mobile Drop Down Menu

jQuery Basics (2014)

Achieved
Mar 3, 2015
Achievement
Creating a Simple Lightbox

jQuery Basics (2014)

Achieved
Mar 3, 2015
Achievement
Creating a Spoiler Revealer

jQuery Basics (2014)

Achieved
Mar 2, 2015
Achievement
Introduction to jQuery

jQuery Basics (2014)

Achieved
Mar 2, 2015
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Mar 1, 2015
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Feb 28, 2015
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Feb 26, 2015
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Feb 24, 2015
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Feb 23, 2015
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Feb 16, 2015
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Feb 16, 2015
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Feb 13, 2015
Achievement
Traversing and Manipulating the DOM with JavaScript

Interactive Web Pages with JavaScript

Achieved
Jan 24, 2015
Achievement
Selecting Elements and Adding Events with JavaScript

Interactive Web Pages with JavaScript

Achieved
Dec 30, 2014
Achievement
JavaScript and the DOM

Interactive Web Pages with JavaScript

Achieved
Dec 28, 2014
Achievement
Choosing Options

HTML Forms

Achieved
Dec 28, 2014
Achievement
Organizing Forms

HTML Forms

Achieved
Dec 28, 2014
Achievement
Form Basics

HTML Forms

Achieved
Dec 27, 2014
Achievement
Media Queries

Unused CSS Stages

Achieved
Dec 23, 2014
Achievement
CSS Animations

Unused CSS Stages

Achieved
Dec 23, 2014
Achievement
Transitions and Transforms

Unused CSS Stages

Achieved
Dec 21, 2014
Achievement
Flexbox and Multi-Column Layout

Unused CSS Stages

Achieved
Dec 20, 2014
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
Dec 20, 2014
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
Dec 20, 2014
Achievement
Basic Layout

CSS Basics (2014)

Achieved
Dec 15, 2014
Achievement
The Box Model

CSS Basics (2014)

Achieved
Dec 15, 2014
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Dec 15, 2014
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Dec 13, 2014
Achievement
Sharing a Website

How to Make a Website

Achieved
Dec 13, 2014
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Dec 13, 2014
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
May 15, 2014
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
May 4, 2014
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Apr 23, 2014
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Apr 19, 2014
Achievement
Creating HTML Content

How to Make a Website

Achieved
Apr 16, 2014
Achievement
HTML First

How to Make a Website

Achieved
Apr 16, 2014
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Apr 16, 2014
Achievement
Introduction to Accounting

How to Start a Business (old)

Achieved
Jul 3, 2013
Achievement
Pretty Little Things

Build a Simple Android App (retired 2014)

Achieved
May 23, 2013
Achievement
Learning the Language

Build a Simple Android App (retired 2014)

Achieved
May 21, 2013
Achievement
Getting Started with Android

Build a Simple Android App (retired 2014)

Achieved
May 18, 2013
Achievement
Marketing Basics

How to Start a Business (old)

Achieved
May 8, 2013
Achievement
Forming Your Company

How to Start a Business (old)

Achieved
May 7, 2013
Achievement
Corporate Structure

How to Start a Business (old)

Achieved
May 7, 2013
Achievement
Why Start a Business?

How to Start a Business (old)

Achieved
May 7, 2013
Achievement
Customizing Google Maps

Build an Interactive Website

Achieved
May 1, 2013
Achievement
Google Maps Integration

Build an Interactive Website

Achieved
May 1, 2013
Achievement
jQuery Plugins

Build an Interactive Website

Achieved
Apr 28, 2013
Achievement
Form Validation and Manipulation

Build an Interactive Website

Achieved
Apr 24, 2013
Achievement
Introduction to jQuery

Build an Interactive Website

Achieved
Apr 23, 2013
Achievement
Web Apps

Accessibility

Achieved
Apr 22, 2013
Achievement
Websites

Accessibility

Achieved
Apr 21, 2013
Achievement
Introduction

Accessibility

Achieved
Apr 21, 2013
Achievement
Advanced Techniques

Build a Responsive Website

Achieved
Apr 21, 2013
Achievement
Responsive Design

Build a Responsive Website

Achieved
Apr 20, 2013
Achievement
Adaptive Design

Build a Responsive Website

Achieved
Apr 19, 2013
Achievement
Fluid Foundation

Build a Responsive Website

Achieved
Apr 14, 2013
Achievement
Introduction to Responsive Web Design

Build a Responsive Website

Achieved
Apr 14, 2013
Achievement
JavaScript Objects

JavaScript Foundations

Achieved
Apr 14, 2013
Achievement
JavaScript Functions

JavaScript Foundations

Achieved
Apr 13, 2013
Achievement
JavaScript Arrays

JavaScript Foundations

Achieved
Apr 12, 2013
Achievement
JavaScript Numbers

JavaScript Foundations

Achieved
Apr 12, 2013
Achievement
JavaScript Strings

JavaScript Foundations

Achieved
Apr 10, 2013
Achievement
Introduction Variables

JavaScript Foundations

Achieved
Apr 10, 2013
Achievement
Functions

Introduction to Programming

Achieved
Apr 9, 2013
Achievement
Objects and Arrays

Introduction to Programming

Achieved
Apr 9, 2013
Achievement
Control Structures

Introduction to Programming

Achieved
Apr 9, 2013
Achievement
Basics

Introduction to Programming

Achieved
Apr 9, 2013
Achievement
Media Queries

CSS3

Achieved
Apr 7, 2013
Achievement
Multi-Column Layouts

CSS3

Achieved
Apr 6, 2013
Achievement
Animation

CSS3

Achieved
Apr 6, 2013
Achievement
Transforms

CSS3

Achieved
Apr 4, 2013
Achievement
Transitions

CSS3

Achieved
Mar 30, 2013
Achievement
Backgrounds

CSS3

Achieved
Mar 30, 2013
Achievement
Gradients

CSS3

Achieved
Mar 30, 2013
Achievement
Borders

CSS3

Achieved
Mar 30, 2013
Achievement
Web Fonts

CSS3

Achieved
Mar 28, 2013
Achievement
Typography

CSS3

Achieved
Mar 27, 2013
Achievement
Selectors

CSS3

Achieved
Mar 27, 2013
Achievement
Color Theory

Aesthetic Foundations

Achieved
Mar 27, 2013
Achievement
Principles

Aesthetic Foundations

Achieved
Mar 27, 2013
Achievement
Elements

Aesthetic Foundations

Achieved
Mar 27, 2013
Achievement
Website Basics

Website Basics

Achieved
Mar 27, 2013
Achievement
Framework Foundations

CSS Foundations - Version 1

Achieved
Mar 27, 2013
Achievement
Printing

CSS Foundations - Version 1

Achieved
Mar 26, 2013
Achievement
Page Layout

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Box Model

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Text

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Data Types

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Selectors

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Introduction

CSS Foundations - Version 1

Achieved
Mar 25, 2013
Achievement
Gradients

CSS Foundations

Achieved
Mar 25, 2013
Achievement
Web Typography

CSS Foundations

Achieved
Mar 24, 2013
Achievement
Backgrounds and Borders

CSS Foundations

Achieved
Mar 22, 2013
Achievement
CSS Box Model

CSS Foundations

Achieved
Mar 22, 2013
Achievement
Text, Fonts, and Lists

CSS Foundations

Achieved
Mar 21, 2013
Achievement
Values and Units

CSS Foundations

Achieved
Mar 20, 2013
Achievement
Advanced Selectors

CSS Foundations

Achieved
Mar 20, 2013
Achievement
Selectors

CSS Foundations

Achieved
Mar 19, 2013
Achievement
Getting Started with CSS

CSS Foundations

Achieved
Mar 19, 2013
Achievement
Forms

HTML

Achieved
Mar 19, 2013
Achievement
Tables

HTML

Achieved
Mar 19, 2013
Achievement
Objects

HTML

Achieved
Mar 19, 2013
Achievement
Links

HTML

Achieved
Mar 19, 2013
Achievement
Lists

HTML

Achieved
Mar 19, 2013
Achievement
Text

HTML

Achieved
Mar 19, 2013
Achievement
Introduction

HTML

Achieved
Mar 19, 2013
Achievement
Launching the Website

Build a Simple Website

Achieved
Mar 18, 2013
Achievement
Styling Content

Build a Simple Website

Achieved
Mar 18, 2013
Achievement
Creating a Website Structure

Build a Simple Website

Achieved
Mar 17, 2013
Achievement
Text Editors and HTML

Build a Simple Website

Achieved
Mar 15, 2013
Achievement
Website Basics

Build a Simple Website

Achieved
Mar 15, 2013
Achievement
Newbie

Achieved
Mar 15, 2013