⚡ CYBER NOVEMBER SALE ⚡ 50% off any plan for 6 months, exclusive to new subscribers.

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

  • 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
      • • 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
  • Samuel Kleos
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Samuel Kleos
    Front End Web Development Techdegree Student 13,728 Points

    ../data/rooms.json -> Status 404

    Posted February 17, 2023 6:26am by Samuel Kleos
    .a{fill-rule:evenodd;}techdegree
    Samuel Kleos
    Front End Web Development Techdegree Student 13,728 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    2 Answers

  • Taishi Arai
    Taishi Arai
    4,737 Points

    My workspace is showing blank the proper workspace is not loading. Its sending me off to an about.blank page.

    Posted February 11, 2023 8:23am by Taishi Arai
    Taishi Arai
    4,737 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    1 Answer

  • Milo Dennison
    PLUS
    Milo Dennison
    Courses Plus Student 4,540 Points

    Can I use an arrow function for the request.onreadystatechange instead of the anonymous function?

    Posted December 12, 2021 12:05am by Milo Dennison
    Milo Dennison
    Courses Plus Student 4,540 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    1 Answer

  • harry shakeshaft
    harry shakeshaft
    3,943 Points

    Preview doesn't match file tree

    Posted July 16, 2021 1:12pm by harry shakeshaft
    harry shakeshaft
    3,943 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    0 Answers

  • Kirt Perez
    Kirt Perez
    7,374 Points

    document.getElementById('roomList') returns a null. Is it wrong to use DOMContentLoaded to fix it?

    Posted March 23, 2021 5:27am by Kirt Perez
    Kirt Perez
    7,374 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    1 Answer

  • Zachary Davidson
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Zachary Davidson
    Full Stack JavaScript Techdegree Graduate 14,454 Points

    Why are the values associated with the keys in the JSON files not wrapped in double quotes?

    Posted January 29, 2021 1:35pm by Zachary Davidson
    .a{fill-rule:evenodd;}techdegree seal-36
    Zachary Davidson
    Full Stack JavaScript Techdegree Graduate 14,454 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    2 Answers

  • Kevin Gamboa
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Kevin Gamboa
    Front End Web Development Techdegree Graduate 14,958 Points

    404 on file path?

    Posted January 12, 2021 9:17am by Kevin Gamboa
    .a{fill-rule:evenodd;}techdegree seal-36
    Kevin Gamboa
    Front End Web Development Techdegree Graduate 14,958 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    1 Answer

  • Kurt Coleman
    Kurt Coleman
    2,967 Points

    Passing variables into Javascript by URL

    Posted October 23, 2020 12:01pm by Kurt Coleman
    Kurt Coleman
    2,967 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    2 Answers

  • Jonathan Ambriz
    PLUS
    Jonathan Ambriz
    Courses Plus Student 3,902 Points

    Display is showing undefined for all room numbers. What do I need to do to my code? I am calling rooms[i].name..

    Posted September 8, 2020 11:51pm by Jonathan Ambriz
    Jonathan Ambriz
    Courses Plus Student 3,902 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    2 Answers

  • Stefan Elsner
    Stefan Elsner
    12,452 Points

    Even though the li elements appear with the correct class of "empty" or "full", the background color won't change

    Posted August 1, 2020 11:41am by Stefan Elsner
    Stefan Elsner
    12,452 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    2 Answers

  • Lainey Odette
    Lainey Odette
    18,618 Points

    Where is the mockup?

    Posted February 17, 2020 10:38pm by Lainey Odette
    Lainey Odette
    18,618 Points
    • JavaScript
    • AJAX Basics
    • Programming AJAX
    • Programming AJAX Challenge

    1 Answer

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.