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

Join our Live Career-Building Workshop: Launch Your Tech-Adjacent Career! ⭐ Register here!

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

Curious which AI tools Treehouse developers love? ⚙️ Check them out!

🫡 Treehouse for Military offers discounts to Veterans, service members and their families!

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • 100 Days of Code
    • Live Sessions
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
  • 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
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • 100 Days of Code Live Sessions Code Adventures Discord Forum Success Stories Treehouse Links
  • 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
      • • 21st Century Skills
      • • AI
      • • Android
      • • APIs
      • • Business
      • • C#
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Equity, Diversity, and Inclusion (EDI)
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • PHP
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
  • juami alcazar
    juami alcazar
    6,443 Points

    just to make sure, the usage of event in the arrow function is just a parameter/argument right? or is it required

    Posted February 10, 2023 12:15pm by juami alcazar
    juami alcazar
    6,443 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    1 Answer

  • zkb
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    zkb
    Front End Web Development Techdegree Graduate 13,636 Points

    Where am I going wrong with my code???

    Posted November 29, 2022 6:58am by zkb
    .a{fill-rule:evenodd;}techdegree seal-36
    zkb
    Front End Web Development Techdegree Graduate 13,636 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Alex Hort-Francis
    Alex Hort-Francis
    17,074 Points

    My solution to the challenge at the end of the video

    Posted July 14, 2022 4:43pm by Alex Hort-Francis
    Alex Hort-Francis
    17,074 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    0 Answers

  • karan Badhwar
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    karan Badhwar
    Web Development Techdegree Graduate 18,135 Points

    event object as a parameter

    Posted February 2, 2022 1:20am by karan Badhwar
    .a{fill-rule:evenodd;}techdegree seal-36
    karan Badhwar
    Web Development Techdegree Graduate 18,135 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    1 Answer

  • Kasoma Ibrahim
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Kasoma Ibrahim
    Full Stack JavaScript Techdegree Graduate 25,206 Points

    Focus did not work on the Form element but on individual elements

    Posted November 18, 2021 9:35am by Kasoma Ibrahim
    .a{fill-rule:evenodd;}techdegree seal-36
    Kasoma Ibrahim
    Full Stack JavaScript Techdegree Graduate 25,206 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    1 Answer

  • Dawid Jacobs
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Dawid Jacobs
    Full Stack JavaScript Techdegree Graduate 17,835 Points

    Tried to refactor the code more, is it still good practice or should I rather leave it like it was?

    Posted September 20, 2021 5:43pm by Dawid Jacobs
    .a{fill-rule:evenodd;}techdegree seal-36
    Dawid Jacobs
    Full Stack JavaScript Techdegree Graduate 17,835 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    0 Answers

  • Tashan Duncan
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Tashan Duncan
    Front End Web Development Techdegree Graduate 17,799 Points

    Why not just use CSS :Focus pseudo-class??

    Posted December 9, 2020 10:01am by Tashan Duncan
    .a{fill-rule:evenodd;}techdegree seal-36
    Tashan Duncan
    Front End Web Development Techdegree Graduate 17,799 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    1 Answer

  • Sean Modd
    Sean Modd
    4,688 Points

    Goal: Apply the spinElement callback to btn1, btn2, and btn3. The spinElement function should trigger on click event!

    Posted October 7, 2020 4:43pm by Sean Modd
    Sean Modd
    4,688 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    2 Answers

  • Ryan Soeder
    Ryan Soeder
    11,056 Points

    Is classList.toggle() ok here?

    Posted September 16, 2020 6:02pm by Ryan Soeder
    Ryan Soeder
    11,056 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    1 Answer

  • Jaime Sanchez
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Jaime Sanchez
    Full Stack JavaScript Techdegree Student 12,431 Points

    callbacks with dom elements challenge task 1 help?

    Posted April 1, 2020 4:47am by Jaime Sanchez
    .a{fill-rule:evenodd;}techdegree
    Jaime Sanchez
    Full Stack JavaScript Techdegree Student 12,431 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Kristina Savova
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Kristina Savova
    Full Stack JavaScript Techdegree Graduate 21,997 Points

    Why is it recommended to use clearInterval() and clearTimeout() together with setTimeout() and setInterval() functions?

    Posted March 17, 2020 4:53pm by Kristina Savova
    .a{fill-rule:evenodd;}techdegree seal-36
    Kristina Savova
    Full Stack JavaScript Techdegree Graduate 21,997 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Conclusion

    1 Answer

  • Christopher Evans
    Christopher Evans
    9,896 Points

    Can we break down all the parts of the functions used in this lesson?

    Posted February 10, 2020 4:39pm by Christopher Evans
    Christopher Evans
    9,896 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    1 Answer

  • David Ryan
    PLUS
    David Ryan
    Courses Plus Student 14,981 Points

    Make sirens?

    Posted October 23, 2019 6:45pm by David Ryan
    David Ryan
    Courses Plus Student 14,981 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with Arguments

    2 Answers

  • Gafur Iusupaliev
    Gafur Iusupaliev
    3,090 Points

    Wouldn't this code do the same thing? Works fine for me, is there a problem that I don't see?

    Posted September 8, 2019 6:46pm by Gafur Iusupaliev
    Gafur Iusupaliev
    3,090 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    3 Answers

  • Juneau Lim
    Juneau Lim
    13,362 Points

    can't we make it even simpler?

    Posted May 23, 2019 5:44pm by Juneau Lim
    Juneau Lim
    13,362 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    1 Answer

  • Khumoyunmirzo Nosirov
    Khumoyunmirzo Nosirov
    8,689 Points

    I couldn't find the error , can Anyone help me?

    Posted March 12, 2019 12:56pm by Khumoyunmirzo Nosirov
    Khumoyunmirzo Nosirov
    8,689 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    2 Answers

  • John Locken
    John Locken
    16,540 Points

    Attempting to streamline final task in Callback Functions in JavaScript

    Posted January 30, 2019 11:21pm by John Locken
    John Locken
    16,540 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Petya Katsarova
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Petya Katsarova
    Front End Web Development Techdegree Graduate 21,342 Points

    i cant figure out the way

    Posted December 7, 2018 8:28am by Petya Katsarova
    .a{fill-rule:evenodd;}techdegree seal-36
    Petya Katsarova
    Front End Web Development Techdegree Graduate 21,342 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Zak Mosbacher
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Zak Mosbacher
    Full Stack JavaScript Techdegree Graduate 16,080 Points

    There was an error with your code: TypeError: 'undefined' is not an object (evaluating 'event.target.className = "spin"'

    Posted December 5, 2018 1:32am by Zak Mosbacher
    .a{fill-rule:evenodd;}techdegree seal-36
    Zak Mosbacher
    Full Stack JavaScript Techdegree Graduate 16,080 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Dilip Agheda
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Dilip Agheda
    Full Stack JavaScript Techdegree Graduate 28,581 Points

    I would like to share a very flexible code based on this lecture.

    Posted November 15, 2018 9:45pm by Dilip Agheda
    .a{fill-rule:evenodd;}techdegree seal-36
    Dilip Agheda
    Full Stack JavaScript Techdegree Graduate 28,581 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with Arguments

    0 Answers

  • codingchewie
    codingchewie
    8,764 Points

    Can D.R.Y be implemented further on the callback?

    Posted September 7, 2018 3:08pm by codingchewie
    codingchewie
    8,764 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    1 Answer

  • Aakash Srivastav
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Aakash Srivastav
    Full Stack JavaScript Techdegree Student 11,638 Points

    Use callbacks on text inputs

    Posted May 14, 2018 5:16pm by Aakash Srivastav
    .a{fill-rule:evenodd;}techdegree
    Aakash Srivastav
    Full Stack JavaScript Techdegree Student 11,638 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    1 Answer

  • ammarkhan
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    ammarkhan
    Front End Web Development Techdegree Student 21,661 Points

    Why have callback as the second argument?

    Posted March 10, 2018 12:26pm by ammarkhan
    .a{fill-rule:evenodd;}techdegree
    ammarkhan
    Front End Web Development Techdegree Student 21,661 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with Arguments

    2 Answers

  • oafwifkeiw
    oafwifkeiw
    1,546 Points

    Is this code ok..?

    Posted March 6, 2018 9:05pm by oafwifkeiw
    oafwifkeiw
    1,546 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    1 Answer

  • Brian Anstett
    Brian Anstett
    5,831 Points

    Function declaration for callback instead of an arrow function.

    Posted August 7, 2017 12:06am by Brian Anstett
    Brian Anstett
    5,831 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using Callbacks on Text Inputs

    1 Answer

  • Kent Hefley
    Kent Hefley
    11,217 Points

    Event Bubbling?

    Posted August 6, 2017 7:34pm by Kent Hefley
    Kent Hefley
    11,217 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Using the Same Callback on Multiple Elements

    4 Answers

  • Cristian Gerardo Hernandez Barrios
    Cristian Gerardo Hernandez Barrios
    28,382 Points

    I'm stuck again

    Posted July 19, 2017 4:40pm by Cristian Gerardo Hernandez Barrios
    Cristian Gerardo Hernandez Barrios
    28,382 Points
    • JavaScript
    • Callback Functions in JavaScript
    • Callbacks and the DOM
    • Callbacks with DOM Elements

    4 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
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2024 Treehouse Island, Inc.