Tutorials

10 Days of Javascript

Name	Preview	Code	Difficulty
Day 0: Hello, World!	Practice printing to stdout using JavaScript.	Javascript	Easy
Day 0: Data Types	Get started with JavaScript data types and practice using the + operator.	Javascript	Easy
Day 1: Arithmetic Operators	Learn arithmetic operators in JavaScript.	Javascript	Easy
Day 1: Functions	Practice writing JavaScript functions.	Javascript	Easy
Day 1: Let and Const	The const declaration creates a read-only reference to a value.	Javascript	Easy
Day 2: Conditional Statements: If-Else	Learning about conditional statements.	Javascript	Easy
Day 2: Conditional Statements: Switch	Practice using Switch statements.	Javascript	Easy
Day 2: Loops	Learn For, While and Do-While loops in Javascript.	Javascript	Easy
Day 3: Arrays	Output the 2nd largest number in an array in JavaScript.	Javascript	Easy
Day 3: Try, Catch, and Finally	Learn to use try, catch, and ‘finally’ in JavaScript.	Javascript	Easy
Day 3: Throw	Practice throwing errors` in JavaScript.	Javascript	Easy
Day 4: Create a Rectangle Object	Create an object with certain properties in JavaScript.	Javascript	Easy
Day 4: Count Objects	Iterate over the elements in an array and perform an action based on each element’s properties.	Javascript	Easy
Day 4: Classes	Practice using JavaScript classes.	Javascript	Easy
Day 5: Inheritance	Practice using prototypes and implementing inheritance in JavaScript.	Javascript	Easy
Day 5: Template Literals	JavaScript Template Strings	Javascript	Easy
Day 5: Arrow Functions	Practice using Arrow Functions in JavaScript.	Javascript	Easy
Day 6: Bitwise Operators	Apply everything we’ve learned in this bitwise AND challenge.	Javascript	Easy
Day 6: JavaScript Dates	Write a JavaScript function that retrieves the day of the week from a given date.	Javascript	Easy
Day 7: Regular Expressions I	Get started with Regular Expressions in JavaScript.	Javascript	Easy
Day 7: Regular Expressions II	Write a JavaScript RegExp to match a name satisfying certain criteria.	Javascript	Easy
Day 7: Regular Expressions III	Regex	Javascript	Easy
Day 8: Create a Button	Create a button.	HTML	Easy
Day 8: Buttons Container	Arrange buttons in a grid.	HTML	Easy
Day 9: Binary Calculator	Create a calculator for base 2 arithmetic.	HTML	Medium