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Sylvester Hofstra

Groningen

Open to Work

12,022

Total Points

•
3,240

JavaScript

3228 pts
Achievements

12 pts
Forum
•
2,216

CSS

2216 pts
Achievements

0 pts
Forum
•
1,907

HTML

1893 pts
Achievements

14 pts
Forum
•
1,666

Development Tools

1666 pts
Achievements

0 pts
Forum
•
502

Digital Literacy

502 pts
Achievements

0 pts
Forum
•
434

PHP

434 pts
Achievements

0 pts
Forum
•
371

C#

371 pts
Achievements

0 pts
Forum
•
64

Java

64 pts
Achievements

0 pts
Forum
•
2

Business

2 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.

Skills & Experience

Spoken Languages
- English
- Dutch

136 Achievements

Achievement
PHP Conditionals

PHP Arrays and Control Structures

Achieved
May 13, 2020
Achievement
PHP on the Web

PHP Basics

Achieved
May 11, 2020
Achievement
Daily Exercise Program

PHP Basics

Achieved
May 11, 2020
Achievement
Unit Converter

PHP Basics

Achieved
May 11, 2020
Achievement
Getting to Know PHP

PHP Basics

Achieved
May 11, 2020
Achievement
Swift Types

Swift Basics

Achieved
May 11, 2020
Achievement
An Introduction to Swift Programming

Swift Basics

Achieved
May 7, 2020
Achievement
Getting the REST You Need 2

Introduction to REST APIs

Achieved
May 6, 2020
Achievement
If Statements

C# Basics

Achieved
Sep 30, 2019
Achievement
Numbers

C# Basics

Achieved
Sep 30, 2019
Achievement
Strings

C# Basics

Achieved
Sep 30, 2019
Achievement
Methods

C# Basics

Achieved
Sep 30, 2019
Achievement
C# Syntax

C# Basics

Achieved
Sep 30, 2019
Achievement
Add Reusable Logic to Your Sass

Sass Basics

Achieved
Sep 24, 2019
Achievement
Write Smart and Efficient CSS with Sass

Sass Basics

Achieved
Sep 24, 2019
Achievement
Improve Your Workflow with Sass

Sass Basics

Achieved
Sep 17, 2019
Achievement
Getting Started with Sass

Sass Basics

Achieved
Sep 17, 2019
Achievement
Finishing the Game

Introducing JavaScript

Achieved
Sep 3, 2019
Achievement
Introducing JavaScript

Introducing JavaScript

Achieved
Sep 2, 2019
Achievement
Getters and Setters

Object-Oriented JavaScript

Achieved
Aug 18, 2019
Achievement
Working with Classes in JavaScript

Object-Oriented JavaScript

Achieved
Aug 18, 2019
Achievement
Object Basics

Object-Oriented JavaScript

Achieved
Aug 18, 2019
Achievement
Introduction to Object-Oriented JavaScript

Object-Oriented JavaScript

Achieved
Aug 18, 2019
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
Aug 17, 2019
Achievement
Testing for Accessibility

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
Mobile Accessibility

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
Accessible UI Patterns

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
Semantic HTML and WAI-ARIA

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
WCAG 2.0 (and Other Standards)

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
Access for Everybody

Web Accessibility Compliance

Achieved
Aug 17, 2019
Achievement
Exploring Async/Await

Asynchronous Programming with JavaScript

Achieved
Aug 16, 2019
Achievement
Understanding Promises

Asynchronous Programming with JavaScript

Achieved
Aug 16, 2019
Achievement
Asynchronous JavaScript with Callbacks

Asynchronous Programming with JavaScript

Achieved
Aug 16, 2019
Achievement
What is Asynchronous Programming?

Asynchronous Programming with JavaScript

Achieved
Aug 16, 2019
Achievement
Programming AJAX

AJAX Basics

Achieved
Aug 15, 2019
Achievement
AJAX Concepts

AJAX Basics

Achieved
Aug 15, 2019
Achievement
Captioning Video

HTML Video and Audio

Achieved
Aug 14, 2019
Achievement
Media Basics

HTML Video and Audio

Achieved
Aug 14, 2019
Achievement
Structuring Tables

HTML Tables

Achieved
Aug 14, 2019
Achievement
Table Basics

HTML Tables

Achieved
Aug 14, 2019
Achievement
Combine and Minify Assets

Introduction to Front End Performance Optimization

Achieved
Aug 14, 2019
Achievement
Optimize Assets

Introduction to Front End Performance Optimization

Achieved
Aug 14, 2019
Achievement
Measuring Performance

Introduction to Front End Performance Optimization

Achieved
Aug 14, 2019
Achievement
Planning for Performance

Introduction to Front End Performance Optimization

Achieved
Aug 14, 2019
Achievement
Building Forms With Bootstrap

Bootstrap Basics

Achieved
Aug 13, 2019
Achievement
Using Bootstrap Components

Bootstrap Basics

Achieved
Aug 13, 2019
Achievement
Responsive Layouts With the Bootstrap Grid

Bootstrap Basics

Achieved
Aug 13, 2019
Achievement
Getting to Know Bootstrap 4

Bootstrap Basics

Achieved
Aug 13, 2019
Achievement
Working with jQuery Collections (2017)

jQuery Basics

Achieved
Aug 13, 2019
Achievement
Understanding jQuery Events and DOM Traversal (2017)

jQuery Basics

Achieved
Aug 12, 2019
Achievement
Introducing jQuery (2017)

jQuery Basics

Achieved
Aug 12, 2019
Achievement
Advanced Selectors

CSS Selectors

Achieved
Aug 12, 2019
Achievement
Going Further with Attribute Selectors and Pseudo-Classes

CSS Selectors

Achieved
Aug 9, 2019
Achievement
Selectors - Beyond the Basics

CSS Selectors

Achieved
Aug 9, 2019
Achievement
Traversing the DOM

JavaScript and the DOM (Retiring)

Achieved
Aug 9, 2019
Achievement
Responding to User Interaction

Interacting with the DOM

Achieved
Aug 8, 2019
Achievement
Making Changes to the DOM

JavaScript and the DOM (Retiring)

Achieved
Aug 8, 2019
Achievement
Getting a Handle on the DOM

JavaScript and the DOM (Retiring)

Achieved
Aug 8, 2019
Achievement
The Browser Environment

JavaScript and the DOM (Retiring)

Achieved
Aug 8, 2019
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Aug 8, 2019
Achievement
Using Slack Effectively

Slack for the Techdegree

Achieved
Aug 7, 2019
Achievement
Introducing Slack for the Techdegree

Slack for the Techdegree

Achieved
Aug 7, 2019
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Sep 18, 2018
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Sep 16, 2018
Achievement
Installing Programs

Console Foundations

Achieved
Sep 15, 2018
Achievement
Environment and Redirection

Console Foundations

Achieved
Sep 15, 2018
Achievement
Console Processes

Console Foundations

Achieved
Sep 13, 2018
Achievement
Console Users and Permission

Console Foundations

Achieved
Sep 13, 2018
Achievement
Moving Around in the Console

Console Foundations

Achieved
Sep 13, 2018
Achievement
GitHub and Other Remote Repositories

Introduction to Git

Achieved
Sep 12, 2018
Achievement
Managing Committed Files

Introduction to Git

Achieved
Sep 12, 2018
Achievement
First Commits

Introduction to Git

Achieved
Sep 12, 2018
Achievement
Choosing Options

HTML Forms

Achieved
Sep 12, 2018
Achievement
Organizing Forms

HTML Forms

Achieved
Sep 12, 2018
Achievement
Form Basics

HTML Forms

Achieved
Sep 12, 2018
Achievement
Building a Layout with Flexbox

CSS Flexbox Layout

Achieved
Sep 10, 2018
Achievement
Flexbox Properties

CSS Flexbox Layout

Achieved
Sep 10, 2018
Achievement
Understanding Flexbox

CSS Flexbox Layout

Achieved
Sep 10, 2018
Achievement
Responsive Patterns

Responsive Layouts

Achieved
Sep 10, 2018
Achievement
Media Queries

Responsive Layouts

Achieved
Sep 10, 2018
Achievement
Responsive Theory

Responsive Layouts

Achieved
Sep 10, 2018
Achievement
Positioning Page Content

CSS Layout Basics

Achieved
Sep 10, 2018
Achievement
CSS Layout Project

CSS Layout Basics

Achieved
Sep 10, 2018
Achievement
WordPress User Roles

WordPress User Roles

Achieved
Sep 6, 2018
Achievement
WordPress Plugins

WordPress Basics

Achieved
Sep 6, 2018
Achievement
WordPress Themes

WordPress Basics

Achieved
Sep 6, 2018
Achievement
The WordPress Customizer

WordPress Basics

Achieved
Sep 6, 2018
Achievement
Managing Media in WordPress

WordPress Basics

Achieved
Sep 5, 2018
Achievement
Managing Content in WordPress

WordPress Basics

Achieved
Sep 5, 2018
Achievement
Installing WordPress Locally

Installing WordPress Locally

Achieved
Sep 4, 2018
Achievement
What Is WordPress?

What Is WordPress?

Achieved
Sep 4, 2018
Achievement
Page Layout with the Float Property

CSS Layout Basics

Achieved
Jul 17, 2018
Achievement
Controlling Layout with CSS Display Modes

CSS Layout Basics

Achieved
Jul 12, 2018
Achievement
Getting Started with CSS Layout

CSS Layout Basics

Achieved
Jul 11, 2018
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Jul 11, 2018
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Jul 9, 2018
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Jul 9, 2018
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Jul 7, 2018
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Jul 7, 2018
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Jun 22, 2018
Achievement
Sharing a Website

How to Make a Website

Achieved
Jun 21, 2018
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Jun 21, 2018
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Jun 20, 2018
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Jun 20, 2018
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Jun 20, 2018
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Jun 19, 2018
Achievement
Creating HTML Content

How to Make a Website

Achieved
Jun 19, 2018
Achievement
HTML First

How to Make a Website

Achieved
Jun 19, 2018
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Jun 19, 2018
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
Jun 18, 2018
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
Jun 18, 2018
Achievement
Basic Layout

CSS Basics (2014)

Achieved
Jun 16, 2018
Achievement
The Box Model

CSS Basics (2014)

Achieved
Jun 15, 2018
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Jun 13, 2018
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Jun 11, 2018
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Jun 11, 2018
Achievement
Going Further with HTML

HTML Basics

Achieved
Jun 11, 2018
Achievement
Images, Text and Links

HTML Basics

Achieved
Jun 11, 2018
Achievement
Structuring Your Content

HTML Basics

Achieved
Jun 11, 2018
Achievement
Getting Started With HTML

HTML Basics

Achieved
Jun 10, 2018
Achievement
Adding a New Web Page

Introduction to HTML and CSS (2016)

Achieved
Jun 10, 2018
Achievement
Make It Beautiful with CSS

Introduction to HTML and CSS (2016)

Achieved
Jun 10, 2018
Achievement
HTML: The Structural Foundation of Web Pages and Applications

Introduction to HTML and CSS (2016)

Achieved
Jun 9, 2018
Achievement
Getting Familiar with HTML and CSS

Introduction to HTML and CSS (2016)

Achieved
Jun 9, 2018
Achievement
MASH JavaScript

Treehouse Club - MASH

Achieved
Jun 9, 2018
Achievement
MASH CSS

Treehouse Club - MASH

Achieved
Jun 9, 2018
Achievement
MASH HTML

Treehouse Club - MASH

Achieved
Jun 9, 2018
Achievement
Treehouse Club - JavaScript

Treehouse Club: JavaScript

Achieved
Jun 9, 2018
Achievement
Treehouse Club - CSS

Treehouse Club: CSS

Achieved
Jun 8, 2018
Achievement
Welcome to the Treehouse Club

Treehouse Club: HTML

Achieved
Jun 8, 2018
Achievement
WWW

How the Web Works

Achieved
Jun 8, 2018
Achievement
The Internet

How the Internet Works

Achieved
Jun 8, 2018
Achievement
Computer Languages

Computer Basics

Achieved
Jun 8, 2018
Achievement
Computer Basics

Computer Basics

Achieved
Jun 8, 2018
Achievement
Getting Started with Java

Java Basics

Achieved
Jun 8, 2018
Achievement
Newbie

Achieved
Jun 8, 2018