John Oconnell

John Oconnell

Member Since March 25, 2016
Open to Work

13,807

Total Points

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

Skills & Experience

167 Achievements

  • Achievement

    Array Manipulation

    JavaScript Array Iteration Methods

    Achieved

    May 19, 2019

    Array Manipulation
  • Achievement

    GitHub and Other Remote Repositories

    Introduction to Git

    Achieved

    May 17, 2019

    GitHub and Other Remote Repositories
  • Achievement

    Managing Committed Files

    Introduction to Git

    Achieved

    May 16, 2019

    Managing Committed Files
  • Achievement

    First Commits

    Introduction to Git

    Achieved

    May 15, 2019

    First Commits
  • Achievement

    Practice forEach

    Practice forEach in JavaScript

    Achieved

    May 6, 2019

    Practice forEach
  • Achievement

    Array Iteration

    JavaScript Array Iteration Methods

    Achieved

    May 5, 2019

    Array Iteration
  • Achievement

    Callbacks and the DOM

    Callback Functions in JavaScript

    Achieved

    May 4, 2019

    Callbacks and the DOM
  • Achievement

    Callbacks with Timers

    Callback Functions in JavaScript

    Achieved

    May 4, 2019

    Callbacks with Timers
  • Achievement

    Introduction to Callback Functions

    Callback Functions in JavaScript

    Achieved

    May 3, 2019

    Introduction to Callback Functions
  • Achievement

    Stateful Components and Lifecycle Methods

    React Components (2018)

    Achieved

    Apr 18, 2019

    Stateful Components and Lifecycle Methods
  • Achievement

    Build Modular Interfaces with Components

    React Components (2018)

    Achieved

    Mar 13, 2019

    Build Modular Interfaces with Components
  • Achievement

    Stateful Components

    React Basics (2018)

    Achieved

    Mar 11, 2019

    Stateful Components
  • Achievement

    Introducing Props

    React Basics (2018)

    Achieved

    Mar 10, 2019

    Introducing Props
  • Achievement

    Thinking in Components

    React Basics (2018)

    Achieved

    Mar 9, 2019

    Thinking in Components
  • Achievement

    First Steps in React

    React Basics (2018)

    Achieved

    Mar 7, 2019

    First Steps in React
  • Achievement

    Creating a Simple Server in Node.js

    Build a Simple Dynamic Site with Node.js

    Achieved

    Mar 7, 2019

    Creating a Simple Server in Node.js
  • Achievement

    Creating a Command Line Weather Application

    Node.js Basics 2017

    Achieved

    Mar 2, 2019

    Creating a Command Line Weather Application
  • Achievement

    Handling Errors in Node

    Node.js Basics 2017

    Achieved

    Mar 2, 2019

    Handling Errors in Node
  • Achievement

    Getting Data From an API With Node

    Node.js Basics 2017

    Achieved

    Feb 28, 2019

    Getting Data From an API With Node
  • Achievement

    Introduction to Node.js

    Node.js Basics 2017

    Achieved

    Feb 28, 2019

    Introduction to Node.js
  • Achievement

    Getters and Setters

    Object-Oriented JavaScript

    Achieved

    Feb 26, 2019

    Getters and Setters
  • Achievement

    Working with Classes in JavaScript

    Object-Oriented JavaScript

    Achieved

    Feb 26, 2019

    Working with Classes in JavaScript
  • Achievement

    Improving the Application Code

    DOM Scripting By Example

    Achieved

    Feb 13, 2019

    Improving the Application Code
  • Achievement

    Object Basics

    Object-Oriented JavaScript

    Achieved

    Feb 10, 2019

    Object Basics
  • Achievement

    Introduction to Object-Oriented JavaScript

    Object-Oriented JavaScript

    Achieved

    Feb 10, 2019

    Introduction to Object-Oriented JavaScript
  • Achievement

    Editing and Filtering Names

    DOM Scripting By Example

    Achieved

    Feb 9, 2019

    Editing and Filtering Names
  • Achievement

    Adding and Removing Names

    DOM Scripting By Example

    Achieved

    Feb 8, 2019

    Adding and Removing Names
  • Achievement

    JavaScript Tools and Workflows

    The Landscape of JavaScript

    Achieved

    Feb 8, 2019

    JavaScript Tools and Workflows
  • Achievement

    JavaScript is Everywhere

    The Landscape of JavaScript

    Achieved

    Feb 8, 2019

    JavaScript is Everywhere
  • Achievement

    Finishing the Game

    Introducing JavaScript

    Achieved

    Feb 8, 2019

    Finishing the Game
  • Achievement

    Introducing JavaScript

    Introducing JavaScript

    Achieved

    Feb 8, 2019

    Introducing JavaScript
  • Achievement

    Traversing the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Feb 8, 2019

    Traversing the DOM
  • Achievement

    Responding to User Interaction

    Interacting with the DOM

    Achieved

    Feb 6, 2019

    Responding to User Interaction
  • Achievement

    Making Changes to the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Feb 5, 2019

    Making Changes to the DOM
  • Achievement

    Create Function Using Arrow Syntax

    Getting Started With ES2015

    Achieved

    Feb 3, 2019

    Create Function Using Arrow Syntax
  • Achievement

    Using Template Literals

    Getting Started With ES2015

    Achieved

    Feb 3, 2019

    Using Template Literals
  • Achievement

    Defining Variables With let and const

    Getting Started With ES2015

    Achieved

    Feb 3, 2019

    Defining Variables With let and const
  • Achievement

    Dungeon Game 2

    Python Collections (2016, retired 2019)

    Achieved

    Jan 10, 2018

    Dungeon Game 2
  • Achievement

    Python Sets

    Python Collections (2016, retired 2019)

    Achieved

    Jan 3, 2018

    Python Sets
  • Achievement

    Python Tuples

    Python Collections (2016, retired 2019)

    Achieved

    Jan 3, 2018

    Python Tuples
  • Achievement

    Python Dictionaries

    Python Collections (2016, retired 2019)

    Achieved

    Jan 2, 2018

    Python Dictionaries
  • Achievement

    Python Slices

    Python Collections (2016, retired 2019)

    Achieved

    Jan 2, 2018

    Python Slices
  • Achievement

    Python Lists

    Python Collections (2016, retired 2019)

    Achieved

    Dec 29, 2017

    Python Lists
  • Achievement

    Letter Game App

    Python Basics (2015)

    Achieved

    Dec 29, 2017

    Letter Game App
  • Achievement

    Number Game App

    Python Basics (2015)

    Achieved

    Dec 28, 2017

    Number Game App
  • Achievement

    Shopping List App

    Python Basics (2015)

    Achieved

    Dec 28, 2017

    Shopping List App
  • Achievement

    Logic in Python

    Python Basics (2015)

    Achieved

    Dec 28, 2017

    Logic in Python
  • Achievement

    Python Data Types

    Python Basics (2015)

    Achieved

    Dec 27, 2017

    Python Data Types
  • Achievement

    Python For Beginners

    Python Basics (2015)

    Achieved

    Dec 26, 2017

    Python For Beginners
  • Achievement

    Ordering, Limiting and Paging Results

    Reporting with SQL

    Achieved

    Dec 22, 2017

    Ordering, Limiting and Paging Results
  • Achievement

    Handling Errors When Manipulating Data

    Modifying Data with SQL

    Achieved

    Dec 22, 2017

    Handling Errors When Manipulating Data
  • Achievement

    Deleting Data from a Database

    Modifying Data with SQL

    Achieved

    Dec 22, 2017

    Deleting Data from a Database
  • Achievement

    Updating Data in a Database

    Modifying Data with SQL

    Achieved

    Dec 22, 2017

    Updating Data in a Database
  • Achievement

    Adding Data to a Database

    Modifying Data with SQL

    Achieved

    Dec 22, 2017

    Adding Data to a Database
  • Achievement

    Finding the Data You Want

    SQL Basics

    Achieved

    Dec 22, 2017

    Finding the Data You Want
  • Achievement

    Getting Data from a Database

    SQL Basics

    Achieved

    Dec 22, 2017

    Getting Data from a Database
  • Achievement

    Data, Databases and SQL

    SQL Basics

    Achieved

    Dec 22, 2017

    Data, Databases and SQL
  • Achievement

    First Steps in React

    React Basics (retired)

    Achieved

    Apr 11, 2017

    First Steps in React
  • Achievement

    Customizing WordPress Themes

    Build a Website with WordPress

    Achieved

    Apr 6, 2017

    Customizing WordPress Themes
  • Achievement

    WordPress Themes

    Build a Website with WordPress

    Achieved

    Apr 6, 2017

    WordPress Themes
  • Achievement

    Chrome DevTools Basics

    Website Optimization

    Achieved

    Apr 5, 2017

    Chrome DevTools Basics
  • Achievement

    Web Apps

    Accessibility

    Achieved

    Mar 31, 2017

    Web Apps
  • Achievement

    Websites

    Accessibility

    Achieved

    Mar 30, 2017

    Websites
  • Achievement

    Getting a Handle on the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Mar 19, 2017

    Getting a Handle on the DOM
  • Achievement

    The Browser Environment

    JavaScript and the DOM (Retiring)

    Achieved

    Mar 17, 2017

    The Browser Environment
  • Achievement

    Introduction

    Accessibility

    Achieved

    Mar 8, 2017

    Introduction
  • Achievement

    Quiz Practice Project

    Object-Oriented JavaScript (2015)

    Achieved

    Mar 8, 2017

    Quiz Practice Project
  • Achievement

    Prototypal Inheritance

    Object-Oriented JavaScript (2015)

    Achieved

    Mar 8, 2017

    Prototypal Inheritance
  • Achievement

    Constructor Functions & Prototypes

    Object-Oriented JavaScript (2015)

    Achieved

    Mar 7, 2017

    Constructor Functions & Prototypes
  • Achievement

    Introduction to Methods

    Object-Oriented JavaScript (2015)

    Achieved

    Mar 1, 2017

    Introduction to Methods
  • Achievement

    AJAX and APIs

    AJAX Basics (retiring)

    Achieved

    Mar 1, 2017

    AJAX and APIs
  • Achievement

    jQuery and AJAX

    AJAX Basics (retiring)

    Achieved

    Feb 28, 2017

    jQuery and AJAX
  • Achievement

    Programming AJAX

    AJAX Basics (retiring)

    Achieved

    Feb 23, 2017

    Programming AJAX
  • Achievement

    AJAX Concepts

    AJAX Basics (retiring)

    Achieved

    Feb 23, 2017

    AJAX Concepts
  • Achievement

    Custom Media Players

    HTML Video and Audio (Retired)

    Achieved

    Feb 21, 2017

    Custom Media Players
  • Achievement

    Captioning Video

    HTML Video and Audio (Retired)

    Achieved

    Feb 20, 2017

    Captioning Video
  • Achievement

    Media Basics

    HTML Video and Audio (Retired)

    Achieved

    Feb 20, 2017

    Media Basics
  • Achievement

    Traversing and Manipulating the DOM with JavaScript

    Interactive Web Pages with JavaScript

    Achieved

    Feb 19, 2017

    Traversing and Manipulating the DOM with JavaScript
  • Achievement

    Creating a Simple Drawing Application

    jQuery Basics (2014)

    Achieved

    Feb 18, 2017

    Creating a Simple Drawing Application
  • Achievement

    Creating a Password Confirmation Form

    jQuery Basics (2014)

    Achieved

    Feb 18, 2017

    Creating a Password Confirmation Form
  • Achievement

    Creating a Mobile Drop Down Menu

    jQuery Basics (2014)

    Achieved

    Feb 18, 2017

    Creating a Mobile Drop Down Menu
  • Achievement

    Creating a Simple Lightbox

    jQuery Basics (2014)

    Achieved

    Feb 17, 2017

    Creating a Simple Lightbox
  • Achievement

    Slices

    Python Collections (Retired)

    Achieved

    Oct 24, 2016

    Slices
  • Achievement

    Lists Redux

    Python Collections (Retired)

    Achieved

    Oct 22, 2016

    Lists Redux
  • Achievement

    Methods

    C# Objects

    Achieved

    Oct 13, 2016

    Methods
  • Achievement

    Object-Oriented Programming

    C# Objects

    Achieved

    Sep 26, 2016

    Object-Oriented Programming
  • Achievement

    Perfect

    C# Basics (Retired)

    Achieved

    Sep 23, 2016

    Perfect
  • Achievement

    The Unity Editor and Scene Setup

    How to Make a Video Game

    Achieved

    Sep 22, 2016

    The Unity Editor and Scene Setup
  • Achievement

    Introduction to Video Games

    How to Make a Video Game

    Achieved

    Sep 22, 2016

    Introduction to Video Games
  • Achievement

    Perform

    C# Basics (Retired)

    Achieved

    Sep 15, 2016

    Perform
  • Achievement

    Console I/O

    C# Basics (Retired)

    Achieved

    Sep 14, 2016

    Console I/O
  • Achievement

    Prepare and Plan

    C# Basics (Retired)

    Achieved

    Sep 13, 2016

    Prepare and Plan
  • Achievement

    Getting the REST You Need

    REST API Basics

    Achieved

    Aug 28, 2016

    Getting the REST You Need
  • Achievement

    Exporting Designs

    Sketch Basics

    Achieved

    Jul 28, 2016

    Exporting Designs
  • Achievement

    Sketch Features

    Sketch Basics

    Achieved

    Jul 28, 2016

    Sketch Features
  • Achievement

    Design Foundations Final

    Design Foundations

    Achieved

    Jul 21, 2016

    Design Foundations Final
  • Achievement

    Becoming a Problem Solver

    Design Foundations

    Achieved

    Jul 21, 2016

    Becoming a Problem Solver
  • Achievement

    Understanding Aesthetics

    Design Foundations

    Achieved

    Jul 21, 2016

    Understanding Aesthetics
  • Achievement

    Introduction to Design

    Design Foundations

    Achieved

    Jul 21, 2016

    Introduction to Design
  • Achievement

    Creating a Spoiler Revealer

    jQuery Basics (2014)

    Achieved

    Jun 18, 2016

    Creating a Spoiler Revealer
  • Achievement

    Building Forms with Bootstrap

    Bootstrap 4 Basics (Retired)

    Achieved

    Jun 18, 2016

    Building Forms with Bootstrap
  • Achievement

    Selecting Elements and Adding Events with JavaScript

    Interactive Web Pages with JavaScript

    Achieved

    Jun 18, 2016

    Selecting Elements and Adding Events with JavaScript
  • Achievement

    JavaScript and the DOM

    Interactive Web Pages with JavaScript

    Achieved

    Jun 17, 2016

    JavaScript and the DOM
  • Achievement

    JavaScript Objects

    JavaScript Loops, Arrays and Objects

    Achieved

    Jun 15, 2016

    JavaScript Objects
  • Achievement

    JavaScript Arrays

    JavaScript Loops, Arrays and Objects

    Achieved

    Jun 12, 2016

    JavaScript Arrays
  • Achievement

    JavaScript Loops

    JavaScript Loops, Arrays and Objects

    Achieved

    Jun 9, 2016

    JavaScript Loops
  • Achievement

    Using Bootstrap Components

    Bootstrap 4 Basics (Retired)

    Achieved

    Jun 9, 2016

    Using Bootstrap Components
  • Achievement

    Responsive Layouts with the Bootstrap Grid

    Bootstrap 4 Basics (Retired)

    Achieved

    Jun 8, 2016

    Responsive Layouts with the Bootstrap Grid
  • Achievement

    Structuring Tables

    HTML Tables

    Achieved

    Jun 8, 2016

    Structuring Tables
  • Achievement

    Table Basics

    HTML Tables

    Achieved

    Jun 8, 2016

    Table Basics
  • Achievement

    Advanced Selectors

    CSS Selectors

    Achieved

    Jun 7, 2016

    Advanced Selectors
  • Achievement

    Going Further with Attribute Selectors and Pseudo-Classes

    CSS Selectors

    Achieved

    Jun 7, 2016

    Going Further with Attribute Selectors and Pseudo-Classes
  • Achievement

    Selectors - Beyond the Basics

    CSS Selectors

    Achieved

    Jun 7, 2016

    Selectors - Beyond the Basics
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Jun 7, 2016

    Choosing Options
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Jun 5, 2016

    Organizing Forms
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Jun 5, 2016

    Form Basics
  • Achievement

    Getting to Know Bootstrap 4

    Bootstrap 4 Basics (Retired)

    Achieved

    May 26, 2016

    Getting to Know Bootstrap 4
  • Achievement

    Building a Layout with Flexbox

    CSS Flexbox Layout

    Achieved

    May 25, 2016

    Building a Layout with Flexbox
  • Achievement

    Flexbox Properties

    CSS Flexbox Layout

    Achieved

    May 25, 2016

    Flexbox Properties
  • Achievement

    Understanding Flexbox

    CSS Flexbox Layout

    Achieved

    May 24, 2016

    Understanding Flexbox
  • Achievement

    Responsive Patterns

    Responsive Layouts

    Achieved

    May 24, 2016

    Responsive Patterns
  • Achievement

    Media Queries

    Responsive Layouts

    Achieved

    May 24, 2016

    Media Queries
  • Achievement

    Responsive Theory

    Responsive Layouts

    Achieved

    May 24, 2016

    Responsive Theory
  • Achievement

    Positioning Page Content

    CSS Layout Basics

    Achieved

    May 24, 2016

    Positioning Page Content
  • Achievement

    CSS Layout Project

    CSS Layout Basics

    Achieved

    May 19, 2016

    CSS Layout Project
  • Achievement

    Page Layout with the Float Property

    CSS Layout Basics

    Achieved

    May 19, 2016

    Page Layout with the Float Property
  • Achievement

    Controlling Layout with CSS Display Modes

    CSS Layout Basics

    Achieved

    May 19, 2016

    Controlling Layout with CSS Display Modes
  • Achievement

    Introduction to Front-End Frameworks

    Framework Basics

    Achieved

    May 19, 2016

    Introduction to Front-End Frameworks
  • Achievement

    Introduction to jQuery

    jQuery Basics (2014)

    Achieved

    May 16, 2016

    Introduction to jQuery
  • Achievement

    Getting Started with CSS Layout

    CSS Layout Basics

    Achieved

    May 13, 2016

    Getting Started with CSS Layout
  • Achievement

    Fundamental Concepts

    CSS Basics (2014)

    Achieved

    May 13, 2016

    Fundamental Concepts
  • Achievement

    Designing with the Latest Features

    CSS Basics (2014)

    Achieved

    May 13, 2016

    Designing with the Latest Features
  • Achievement

    Basic Layout

    CSS Basics (2014)

    Achieved

    May 13, 2016

    Basic Layout
  • Achievement

    JavaScript Functions

    JavaScript Basics (Retired)

    Achieved

    May 13, 2016

    JavaScript Functions
  • Achievement

    JavaScript Conditional Statements

    JavaScript Basics (Retired)

    Achieved

    May 12, 2016

    JavaScript Conditional Statements
  • Achievement

    Introducing JavaScript

    JavaScript Basics (Retired)

    Achieved

    May 12, 2016

    Introducing JavaScript
  • Achievement

    The Box Model

    CSS Basics (2014)

    Achieved

    May 12, 2016

    The Box Model
  • Achievement

    Understanding Values and Units

    CSS Basics (2014)

    Achieved

    May 12, 2016

    Understanding Values and Units
  • Achievement

    Client Services

    How to Run a Web Design Business

    Achieved

    May 11, 2016

    Client Services
  • Achievement

    Sales and Pitching

    How to Run a Web Design Business

    Achieved

    May 11, 2016

    Sales and Pitching
  • Achievement

    Marketing and Promotion

    How to Run a Web Design Business

    Achieved

    May 11, 2016

    Marketing and Promotion
  • Achievement

    More Advanced PHP for WordPress

    PHP for WordPress

    Achieved

    May 11, 2016

    More Advanced PHP for WordPress
  • Achievement

    PHP Basics for WordPress

    PHP for WordPress

    Achieved

    May 11, 2016

    PHP Basics for WordPress
  • Achievement

    Introduction to PHP for WordPress

    PHP for WordPress

    Achieved

    May 11, 2016

    Introduction to PHP for WordPress
  • Achievement

    Local WordPress Development

    Local WordPress Development

    Achieved

    May 10, 2016

    Local WordPress Development
  • Achievement

    Starting a WordPress Theme

    WordPress Theme Development

    Achieved

    May 9, 2016

    Starting a WordPress Theme
  • Achievement

    Getting Started with WordPress

    Getting Started with WordPress

    Achieved

    May 9, 2016

    Getting Started with WordPress
  • Achievement

    Customizing WordPress Themes

    How to Make a Website with WordPress

    Achieved

    May 9, 2016

    Customizing WordPress Themes
  • Achievement

    WordPress Themes

    How to Make a Website with WordPress

    Achieved

    May 9, 2016

    WordPress Themes
  • Achievement

    Installing Wordpress

    How to Make a Website with WordPress

    Achieved

    May 9, 2016

    Installing Wordpress
  • Achievement

    JavaScript Numbers

    JavaScript Basics (Retired)

    Achieved

    May 1, 2016

    JavaScript Numbers
  • Achievement

    JavaScript Variables

    JavaScript Basics (Retired)

    Achieved

    Apr 30, 2016

    JavaScript Variables
  • Achievement

    Introducing Sketch

    Sketch Basics

    Achieved

    Apr 6, 2016

    Introducing Sketch
  • Achievement

    Basic Selectors

    CSS Basics (2014)

    Achieved

    Apr 5, 2016

    Basic Selectors
  • Achievement

    Debugging HTML and CSS Problems

    How to Make a Website

    Achieved

    Apr 5, 2016

    Debugging HTML and CSS Problems
  • Achievement

    Sharing a Website

    How to Make a Website

    Achieved

    Apr 5, 2016

    Sharing a Website
  • Achievement

    Responsive Web Design and Testing

    How to Make a Website

    Achieved

    Apr 5, 2016

    Responsive Web Design and Testing
  • Achievement

    Adding Pages to a Website

    How to Make a Website

    Achieved

    Apr 5, 2016

    Adding Pages to a Website
  • Achievement

    Styling Web Pages and Navigation

    How to Make a Website

    Achieved

    Apr 5, 2016

    Styling Web Pages and Navigation
  • Achievement

    Getting Started with CSS Transitions

    CSS Transitions and Transforms

    Achieved

    Mar 31, 2016

    Getting Started with CSS Transitions
  • Achievement

    Getting Started with CSS

    CSS Basics (2014)

    Achieved

    Mar 30, 2016

    Getting Started with CSS
  • Achievement

    Customizing Colors and Fonts

    How to Make a Website

    Achieved

    Mar 27, 2016

    Customizing Colors and Fonts
  • Achievement

    CSS: Cascading Style Sheets

    How to Make a Website

    Achieved

    Mar 27, 2016

    CSS: Cascading Style Sheets
  • Achievement

    Creating HTML Content

    How to Make a Website

    Achieved

    Mar 26, 2016

    Creating HTML Content
  • Achievement

    HTML First

    How to Make a Website

    Achieved

    Mar 25, 2016

    HTML First
  • Achievement

    Beginning HTML and CSS

    How to Make a Website

    Achieved

    Mar 25, 2016

    Beginning HTML and CSS
  • Achievement

    Newbie

    Achieved

    Mar 25, 2016

    Newbie