JavaScript functions are reusable blocks of code designed to perform a specific task. They help organize your program, reduce repetition, and make your code easier to read and maintain.
- A function is defined using the function keyword or arrow (=>) syntax.
- Functions accept parameters as input and return results using return.
- Functions run only when they are called (invoked) in your code.
JavaScript Function Examples
The following JavaScript section contains a wide collection of JavaScript examples. Many of these programming examples contain multiple approaches to solve the problem.
- Write a function
- Currying function
- Calling a JavaScript function in HTML
- setTimeout() function
- Anonymous functions
- Check whether a number is NaN or finite
- Encode and decode a URL
- Declare the optional function parameters
- Dynamic JavaScript function parameters.
- Importing one JavaScript file into another
- Overriding a JavaScript function
- Using function declaration
- Difference between call and apply
- Caller function
- Negating a predicate function
- Iterate over a callback n times
- Call a function with preset arguments
- Removing specific keys from an object
- Calling multiple functions with the same arguments
- Calling a function by its name as a string
- Measure time taken by a function to execute
- Check a function is defined
- Call a function with modified arguments
- Wait for a promise before returning a value
- Change a global variable inside a function
- Getting the index of the fastest function in an array
- Add an element horizontally in Html page
- Adding fade-out effect
- Add fade-in effect
- Understanding setTimeout() code snippets
For More details follow these articles :