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Stefan Elsner

Member Since July 20, 2019

12,452

Total Points

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4,161

JavaScript

4161 pts
Achievements

0 pts
Forum
•
2,513

CSS

2513 pts
Achievements

0 pts
Forum
•
1,441

Databases

1441 pts
Achievements

0 pts
Forum
•
1,361

HTML

1361 pts
Achievements

0 pts
Forum
•
794

Development Tools

794 pts
Achievements

0 pts
Forum
•
743

Design

743 pts
Achievements

0 pts
Forum
•
188

Python

188 pts
Achievements

0 pts
Forum
•
40

Digital Literacy

40 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.

149 Achievements

Achievement
Types and Branching

Python Basics

Achieved
Sep 2, 2021
Achievement
Meet Python

Python Basics

Achieved
Aug 29, 2021
Achievement
React Component Patterns

React Components (2018)

Achieved
Jul 25, 2021
Achievement
What is Wireframing?

Introduction to Wireframing

Achieved
Jun 23, 2021
Achievement
Hello, JavaScript!

JavaScript Basics

Achieved
May 2, 2021
Achievement
Day 3: Getting Creative

SQL Reporting by Example

Achieved
Apr 22, 2021
Achievement
Day 2: Advanced Selecting

SQL Reporting by Example

Achieved
Apr 17, 2021
Achievement
Day 1: Joining Tables

SQL Reporting by Example

Achieved
Apr 13, 2021
Achievement
Orientation: Selecting Data

SQL Reporting by Example

Achieved
Apr 12, 2021
Achievement
Subqueries

Querying Relational Databases

Achieved
Apr 9, 2021
Achievement
Set Operations

Querying Relational Databases

Achieved
Apr 4, 2021
Achievement
Joining Table Data with SQL

Querying Relational Databases

Achieved
Apr 3, 2021
Achievement
Table Relationships

Querying Relational Databases

Achieved
Apr 2, 2021
Achievement
Database Keys

Querying Relational Databases

Achieved
Apr 2, 2021
Achievement
Database Normalization

Querying Relational Databases

Achieved
Apr 2, 2021
Achievement
Date and Time Functions

Reporting with SQL

Achieved
Apr 1, 2021
Achievement
Aggregate and Numeric Functions

Reporting with SQL

Achieved
Apr 1, 2021
Achievement
Working with Text

Reporting with SQL

Achieved
Mar 28, 2021
Achievement
Ordering, Limiting and Paging Results

Reporting with SQL

Achieved
Mar 23, 2021
Achievement
Handling Errors When Manipulating Data

Modifying Data with SQL

Achieved
Mar 22, 2021
Achievement
Deleting Data from a Database

Modifying Data with SQL

Achieved
Mar 21, 2021
Achievement
Updating Data in a Database

Modifying Data with SQL

Achieved
Mar 21, 2021
Achievement
Adding Data to a Database

Modifying Data with SQL

Achieved
Mar 21, 2021
Achievement
Finding the Data You Want

SQL Basics

Achieved
Mar 21, 2021
Achievement
Getting Data from a Database

SQL Basics

Achieved
Mar 20, 2021
Achievement
Data, Databases and SQL

SQL Basics

Achieved
Mar 17, 2021
Achievement
Stateful Components and Lifecycle Methods

React Components (2018)

Achieved
Feb 25, 2021
Achievement
Managing State and Data Flow

React Components (2018)

Achieved
Feb 21, 2021
Achievement
Build Modular Interfaces with Components

React Components (2018)

Achieved
Feb 19, 2021
Achievement
Stateful Components

React Basics (2018)

Achieved
Feb 10, 2021
Achievement
Introducing Props

React Basics (2018)

Achieved
Feb 2, 2021
Achievement
Thinking in Components

React Basics (2018)

Achieved
Jan 21, 2021
Achievement
First Steps in React

React Basics (2018)

Achieved
Nov 21, 2020
Achievement
Principles of Design

Visual Design Foundations

Achieved
Nov 17, 2020
Achievement
Elements of Design

Visual Design Foundations

Achieved
Nov 17, 2020
Achievement
Going Further with Grid Layout

CSS Grid Layout

Achieved
Sep 26, 2020
Achievement
Flexible Sized Grids

CSS Grid Layout

Achieved
Sep 25, 2020
Achievement
Introducing Grid Layout

CSS Grid Layout

Achieved
Sep 25, 2020
Achievement
Add Reusable Logic to Your Sass

Sass Basics

Achieved
Sep 24, 2020
Achievement
Write Smart and Efficient CSS with Sass

Sass Basics

Achieved
Sep 22, 2020
Achievement
Improve Your Workflow with Sass

Sass Basics

Achieved
Sep 21, 2020
Achievement
Getting Started with Sass

Sass Basics

Achieved
Sep 21, 2020
Achievement
Keyframe and Line Drawing Animations

Animating SVG with CSS

Achieved
Sep 19, 2020
Achievement
Transitions and Transforms

Animating SVG with CSS

Achieved
Sep 19, 2020
Achievement
Creating an SVG

SVG Basics

Achieved
Sep 17, 2020
Achievement
Introduction to SVG

SVG Basics

Achieved
Sep 17, 2020
Achievement
Adding 3D Effects with CSS

CSS Transitions and Transforms

Achieved
Sep 16, 2020
Achievement
Getting Started with CSS Transforms

CSS Transitions and Transforms

Achieved
Sep 14, 2020
Achievement
Transition Timing Functions and Delays

CSS Transitions and Transforms

Achieved
Sep 13, 2020
Achievement
Getting Started with CSS Transitions

CSS Transitions and Transforms

Achieved
Sep 12, 2020
Achievement
Design Patterns

Prototyping in the Browser

Achieved
Sep 9, 2020
Achievement
Page Layout

Prototyping in the Browser

Achieved
Sep 8, 2020
Achievement
Going Further with Type

Typography for Designers

Achieved
Sep 7, 2020
Achievement
Laying Out Type

Typography for Designers

Achieved
Sep 7, 2020
Achievement
Web Typography

Typography for Designers

Achieved
Sep 6, 2020
Achievement
How to Choose and Use Fonts

Typography for Designers

Achieved
Sep 5, 2020
Achievement
Introduction to Typography

Typography for Designers

Achieved
Sep 5, 2020
Achievement
Exploration

Web Design Process

Achieved
Sep 2, 2020
Achievement
Discovery

Web Design Process

Achieved
Aug 29, 2020
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
Aug 19, 2020
Achievement
Testing for Accessibility

Web Accessibility Compliance

Achieved
Aug 16, 2020
Achievement
Mobile Accessibility

Web Accessibility Compliance

Achieved
Aug 16, 2020
Achievement
Accessible UI Patterns

Web Accessibility Compliance

Achieved
Aug 16, 2020
Achievement
Semantic HTML and WAI-ARIA

Web Accessibility Compliance

Achieved
Aug 14, 2020
Achievement
WCAG 2.0 (and Other Standards)

Web Accessibility Compliance

Achieved
Aug 14, 2020
Achievement
Access for Everybody

Web Accessibility Compliance

Achieved
Aug 14, 2020
Achievement
Practicing Classes

Practice Classes in JavaScript

Achieved
Aug 14, 2020
Achievement
Getters and Setters

Object-Oriented JavaScript

Achieved
Aug 13, 2020
Achievement
Working with Classes in JavaScript

Object-Oriented JavaScript

Achieved
Aug 12, 2020
Achievement
Practicing Object Basics

Practice Object Basics in JavaScript

Achieved
Aug 12, 2020
Achievement
Object Basics

Object-Oriented JavaScript

Achieved
Aug 12, 2020
Achievement
Introduction to Object-Oriented JavaScript

Object-Oriented JavaScript

Achieved
Aug 12, 2020
Achievement
Exploring Async/Await

Asynchronous Programming with JavaScript

Achieved
Aug 10, 2020
Achievement
Understanding Promises

Asynchronous Programming with JavaScript

Achieved
Aug 6, 2020
Achievement
Asynchronous JavaScript with Callbacks

Asynchronous Programming with JavaScript

Achieved
Aug 3, 2020
Achievement
What is Asynchronous Programming?

Asynchronous Programming with JavaScript

Achieved
Aug 2, 2020
Achievement
Programming AJAX

AJAX Basics

Achieved
Aug 1, 2020
Achievement
AJAX Concepts

AJAX Basics

Achieved
Jul 25, 2020
Achievement
Captioning Video

HTML Video and Audio

Achieved
Jul 18, 2020
Achievement
Media Basics

HTML Video and Audio

Achieved
Jul 18, 2020
Achievement
Structuring Tables

HTML Tables

Achieved
Jul 15, 2020
Achievement
Table Basics

HTML Tables

Achieved
Jul 13, 2020
Achievement
Combine and Minify Assets

Introduction to Front End Performance Optimization

Achieved
Jul 10, 2020
Achievement
Optimize Assets

Introduction to Front End Performance Optimization

Achieved
Jul 9, 2020
Achievement
Measuring Performance

Introduction to Front End Performance Optimization

Achieved
Jul 4, 2020
Achievement
Planning for Performance

Introduction to Front End Performance Optimization

Achieved
Jul 3, 2020
Achievement
Building Forms With Bootstrap

Bootstrap Basics

Achieved
Jul 2, 2020
Achievement
Using Bootstrap Components

Bootstrap Basics

Achieved
Jun 29, 2020
Achievement
Responsive Layouts With the Bootstrap Grid

Bootstrap Basics

Achieved
Jun 26, 2020
Achievement
Getting to Know Bootstrap 4

Bootstrap Basics

Achieved
Jun 20, 2020
Achievement
Working with jQuery Collections (2017)

jQuery Basics

Achieved
Jun 16, 2020
Achievement
Understanding jQuery Events and DOM Traversal (2017)

jQuery Basics

Achieved
Jun 11, 2020
Achievement
Introducing jQuery (2017)

jQuery Basics

Achieved
Jun 6, 2020
Achievement
Advanced Selectors

CSS Selectors

Achieved
Jun 4, 2020
Achievement
Going Further with Attribute Selectors and Pseudo-Classes

CSS Selectors

Achieved
May 30, 2020
Achievement
Selectors - Beyond the Basics

CSS Selectors

Achieved
May 25, 2020
Achievement
Choosing Options

HTML Forms

Achieved
Jan 26, 2020
Achievement
Organizing Forms

HTML Forms

Achieved
Jan 23, 2020
Achievement
Form Basics

HTML Forms

Achieved
Jan 22, 2020
Achievement
Building a Layout with Flexbox

CSS Flexbox Layout

Achieved
Dec 3, 2019
Achievement
Flexbox Properties

CSS Flexbox Layout

Achieved
Nov 25, 2019
Achievement
Understanding Flexbox

CSS Flexbox Layout

Achieved
Nov 19, 2019
Achievement
Responsive Patterns

Responsive Layouts

Achieved
Nov 19, 2019
Achievement
Media Queries

Responsive Layouts

Achieved
Nov 17, 2019
Achievement
Responsive Theory

Responsive Layouts

Achieved
Nov 14, 2019
Achievement
Positioning Page Content

CSS Layout Basics

Achieved
Nov 13, 2019
Achievement
CSS Layout Project

CSS Layout Basics

Achieved
Nov 11, 2019
Achievement
Page Layout with the Float Property

CSS Layout Basics

Achieved
Nov 8, 2019
Achievement
Controlling Layout with CSS Display Modes

CSS Layout Basics

Achieved
Nov 2, 2019
Achievement
Getting Started with CSS Layout

CSS Layout Basics

Achieved
Nov 2, 2019
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
Oct 24, 2019
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
Oct 22, 2019
Achievement
Basic Layout

CSS Basics (2014)

Achieved
Oct 21, 2019
Achievement
The Box Model

CSS Basics (2014)

Achieved
Oct 20, 2019
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Oct 17, 2019
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Oct 13, 2019
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Oct 12, 2019
Achievement
Going Further with HTML

HTML Basics

Achieved
Oct 10, 2019
Achievement
Images, Text and Links

HTML Basics

Achieved
Oct 8, 2019
Achievement
Structuring Your Content

HTML Basics

Achieved
Oct 7, 2019
Achievement
Getting Started With HTML

HTML Basics

Achieved
Oct 5, 2019
Achievement
Adding a New Web Page

Introduction to HTML and CSS (2016)

Achieved
Oct 4, 2019
Achievement
Make It Beautiful with CSS

Introduction to HTML and CSS (2016)

Achieved
Oct 3, 2019
Achievement
HTML: The Structural Foundation of Web Pages and Applications

Introduction to HTML and CSS (2016)

Achieved
Oct 3, 2019
Achievement
Getting Familiar with HTML and CSS

Introduction to HTML and CSS (2016)

Achieved
Oct 3, 2019
Achievement
Improving the Application Code

DOM Scripting By Example

Achieved
Oct 1, 2019
Achievement
Editing and Filtering Names

DOM Scripting By Example

Achieved
Sep 29, 2019
Achievement
Adding and Removing Names

DOM Scripting By Example

Achieved
Sep 29, 2019
Achievement
Traversing the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 28, 2019
Achievement
Responding to User Interaction

Interacting with the DOM

Achieved
Sep 25, 2019
Achievement
Making Changes to the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 21, 2019
Achievement
Getting a Handle on the DOM

JavaScript and the DOM (Retiring)

Achieved
Sep 13, 2019
Achievement
The Browser Environment

JavaScript and the DOM (Retiring)

Achieved
Sep 10, 2019
Achievement
Create Function Using Arrow Syntax

Getting Started With ES2015

Achieved
Sep 9, 2019
Achievement
Using Template Literals

Getting Started With ES2015

Achieved
Aug 18, 2019
Achievement
Defining Variables With let and const

Getting Started With ES2015

Achieved
Aug 14, 2019
Achievement
JavaScript Tools and Workflows

The Landscape of JavaScript

Achieved
Aug 11, 2019
Achievement
JavaScript is Everywhere

The Landscape of JavaScript

Achieved
Aug 11, 2019
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Aug 6, 2019
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Aug 3, 2019
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Jul 28, 2019
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Jul 27, 2019
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Jul 26, 2019
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Jul 24, 2019
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Jul 23, 2019
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Jul 21, 2019
Achievement
Finishing the Game

Introducing JavaScript

Achieved
Jul 21, 2019
Achievement
Introducing JavaScript

Introducing JavaScript

Achieved
Jul 20, 2019
Achievement
Newbie

Achieved
Jul 20, 2019