JavaScript Functions

Step 1 Beginner

• Functions are reusable code blocks designed for particular tasks
• Functions are executed when they are called or invoked
• Functions are fundamental in all programming languages

Step 2 Beginner

• Functions are executed when they are called or invoked
• You call a function by adding parentheses to its name: name()

Step 3 Beginner

• Parameters allow you to send values to a function
• Parameters are listed in parentheses in the function definition

Step 4 Beginner

• A function can return a value back to the code that called it
• The return statement is used to return a value from a function

Step 5 Intermediate

• Function parameters and arguments are distinct concepts
• Parameters are the names listed in the function definition
• Arguments are the values received by the function

Step 6 Intermediate

• A function expression is a function stored in a variable
• The variable name can be used to call the function

Step 7 Intermediate

• Arrow Functions is a short syntax for function expressions
• You can skip the function keyword
• You can skip the return keyword
• You can skip the curly brackets

Step 8 Intermediate

• Test your knowledge of JavaScript functions
• The quiz uses the examples you learned in the tutorial

Step 1 Advanced

• Function declarations
• Function Expression
• Arrow Functions
• Function Constructors

Step 2 Advanced

A JavaScript callback is a function passed as an argument to another function, which is then executed (or "called back") at a later point in time to complete a specific task.

Step 3 Advanced

How this works (especially inside objects).

How this is decided by how it is called.

Step 4 Advanced

Call a function with a chosen this .

Pass a list of arguments.

Step 5 Advanced

Call a function with a chosen this .

Pass an array of arguments.

Step 6 Advanced

Call a function with a chosen this .

Use bind() when you need a function to run later with the same this .

Step 7 Advanced

Self-starting functions.

Step 8 Advanced

Functions that remember their scope

Learn how functions can remember variables after the outer function finishes.

Step 9 Advanced

Function Object Methods & Properties.