Thank you all for participating the event!

Whether you attended or missed it, we have something new for you!
LeetCode has published a new 30 Days of JavaScript study plan, including 7 new problems that optimized the learning path to help beginners learn basic JavaScript.

➡️ Check out the study plan HERE.

With this new study plan, you can practice the problems at your own pace and even earn a 🏅 badge!

The LeetCoins were distributed to the participants and below are the winners. LeetCode team will contact you soon for the prize delivery!

• Lucky Participation Rewards
  • LeetCode Cap goes to @igor0
  • LeetCode Water Bottle goes to @ssharyk @vishnu23kumar
  • LeetCode Hoodie goes to @larryjasmine @hsdsh @ramanathan_al
• JS Community Champion: LeetCode polo shirt goes to @Cosmic_Phantom

Did the event help you learn JavaScript? Comment and share your experience with us!

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[The event has ended]

Are you a front-end engineer looking to improve your JavaScript skills? Or perhaps you're a non-front-end engineer looking to learn JavaScript? Then the 30 Days LeetCode Challenge is just for you!

Every day starting May 5, LeetCode will pick one JavaScript problem to solve. Solve the daily problem to win rewards and master basic JavaScript skills. JavaScript beginners are welcome to join the event.

Day	Topic	Problem	Editorial
1	Closure	Create Hello World Function	Editorial
2	Closure	Counter	Editorial
3	Closure	Counter II	Editorial
4	Basic Array Transforms	Apply Transform Over Each Element in Array	Editorial
5	Basic Array Transforms	Filter Elements from Array	Editorial
6	Basic Array Transforms	Array Reduce Transformation	Editorial
7	Function input and Output	Function Composition	Editorial
8	Function input and Output	Allow One Function Call	Editorial
9	Function input and Output	Memoize	Editorial
10	Function input and Output	Curry	Editorial
11	Promise	Sleep	Editorial
12	Promise	Promise Time Limit	Editorial
13	Promise	Promise Pool	Editorial
14	Time (setTimeout)	Cache With Time Limit	Editorial
15	Time (setTimeout)	Debounce	Editorial
16	Time (setTimeout)	Throttle	Editorial
17	JSON / Recursion / Important Utilities	JSON Deep Equal	Editorial
18	JSON / Recursion / Important Utilities	Convert Object to JSON String	Editorial
19	JSON / Recursion / Important Utilities	Array of Objects to Matrix	Editorial
20	JSON / Recursion / Important Utilities	Differences Between Two Objects	Editorial
21	JSON / Recursion / Important Utilities	Chunk Array	Editorial
22	JSON / Recursion / Important Utilities	Flatten Deeply Nested Array	Editorial
23	This	Array Prototype Last	Editorial
24	This	Group By	Editorial
25	This	Check if Object Instance of Class	Editorial
26	This	Call Function with Custom Context	Editorial
27	Classes	Event Emitter	Editorial
28	Classes	Array Wrapper	Editorial
29	Generators	Generate Fibonacci Sequence	Editorial
30	Generators	Nested Array Generator	Editorial

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❓ How to Participate?
To participate, simply start solving the daily problems. The daily problem will be released at 00:00 UTC each day in THIS POST, and you must solve the problems within 30 days to qualify for the rewards.

Don't want to miss any day? ➡️ Fill out the registration form and let LeetCode help you be consistent!. Also, join the Discord community to solve problems together with other LeetCoders!
By filling up the registration form, you'll receive a daily email remider with the link to the problem and be qualified for participation rewards.

📜 Rules
The rules are simple: solve the daily problem to qualify for the rewards. The reward distribution will take place after the event ends.

🎁 Rewards

• 10 Days Rewards: Win 100 LeetCoins by solving 10 problems
• 20 Days Rewards: Win 200 LeetCoins by solving 20 problems
• 30 Days Rewards: Win 300 LeetCoins by solving 30 problems
• Lucky Participation Rewards
  • 1 LeetCode Cap to one user who fill out the registration form and solve more than 10 problems.
  • 2 LeetCode Water Bottles to users who fill out the registration form and solve more than 20 problems.
  • 3 LeetCode Hoodies to users who fill out the registration form and solve 30 problems.
• JS Community Champion: LeetCode polo shirts to users who actively contribute high-quality solutions/comments/discussions in JS problems

? Days Rewards CANNOT be accumulcated. For example, you won't get 10 days and 20 days rewards when you're qualified for 30 days rewards.
Participation Rewards CAN be accumulcated. For example, you'll have the chance to win LeetCode Cap and LeetCode Water Bottle if you solve 30 problems.

Are you ready to start sharpening your JavaScript skills and win rewards?
Register NOW and add the reminder to your calendar so you don't miss a problem.

⚡️ Disclaimer: LeetCode reserves the right, in our sole discretion, to disqualify any entries where we believe a user undermines the fairness of this event, which includes, but is not limited to, copying and pasting solutions from other places directly into your submission.