Proof+250 XP
Fetch Your First API
Build a small web page that uses fetch() to load JSON from a free public API. Post a screenshot or short write-up.
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Coding · Facts & stats · iChallenge network
The Ajax Challenge
Daily facts and stats about ajax and asynchronous web programming, plus real challenges to put them to work.
Today's 3 challenges
Which data format is most common in Ajax responses today?
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Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #37Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Streak · 7 days+185 XP
7-Day JavaScript Streak
Practice JavaScript for 20 minutes every day. Check in once a day.
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Proof+250 XP
Network Tab Detective
Open your browser's developer tools on a site you use, find one fetch or XHR request, and post a short write-up of what it loads.
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By the numbers
Live counts from AjaxChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days144
Challenge joins12
Leaderboard
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Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Put a prize on a challenge
Fund a prize on AjaxChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
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Questions
Is this fantasy sports?
No wagering — knowledge and prediction games with leaderboard rank.
How often do quizzes rotate?
New rounds land weekly per topic.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.