AI can only take you so far. 🌟 Start with core skills in JavaScript, HTML, CSS, or Python. 🚀

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

New No-Code Track! 🚀start learning today!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
    • College Credit
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks College Credit
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • Android
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
      • • Vibe Coding
  • Mostafa Mostafa
    Mostafa Mostafa
    167 Points

    i have a problem in increment-ting need Help!!!

    Posted July 16, 2018 11:39pm by Mostafa Mostafa
    Mostafa Mostafa
    167 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • silva celso
    silva celso
    13,513 Points

    What version of react is this "react basics" course based on?

    Posted July 10, 2018 4:13pm by silva celso
    silva celso
    13,513 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    3 Answers

  • SH Ding
    SH Ding
    3,125 Points

    At 6:30 in this video, what is the difference between calling decrementScore and decrementScore().

    Posted June 27, 2018 4:40pm by SH Ding
    SH Ding
    3,125 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • Dylan Welch
    Dylan Welch
    2,809 Points

    incrementScore works fine, but decrementScore does not

    Posted December 19, 2017 3:29am by Dylan Welch
    Dylan Welch
    2,809 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • Xiaoxuan Wang
    Xiaoxuan Wang
    4,590 Points

    Getting 'Uncaught TypeError: Cannot read property 'initialScore' of undefined'

    Posted August 27, 2017 9:56pm by Xiaoxuan Wang
    Xiaoxuan Wang
    4,590 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • Thomas Faller
    Thomas Faller
    9,640 Points

    I'm getting "Cannot read property 'score' of undefined", in my code I changed Player into a variable so that might be it

    Posted July 11, 2017 5:37pm by Thomas Faller
    Thomas Faller
    9,640 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • Qian Chen
    Qian Chen
    33,579 Points

    incrementScore and decrementScore should use the function version of setState

    Posted January 6, 2017 9:21am by Qian Chen
    Qian Chen
    33,579 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • hum4n01d
    hum4n01d
    25,493 Points

    Can’t set state of null

    Posted January 5, 2017 2:45am by hum4n01d
    hum4n01d
    25,493 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    3 Answers

  • Oscar Morrison
    Oscar Morrison
    11,211 Points

    Binding in component classes

    Posted November 13, 2016 1:18pm by Oscar Morrison
    Oscar Morrison
    11,211 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    1 Answer

  • Tiago Loriato
    Tiago Loriato
    1,108 Points

    After I completed these steps I wanted to download my work but...

    Posted October 19, 2016 8:06pm by Tiago Loriato
    Tiago Loriato
    1,108 Points
    • JavaScript
    • React Basics (retired)
    • Stateful Components
    • Updating State

    2 Answers

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

    Treehouse

  • About
  • Blog
  • Careers
  • Community
  • Stories
  • Shop
  • Contact
  • Gift Card

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Affiliates
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2025 Treehouse Island, Inc.