
**Higher-Order Function** are functions that can return a function or receive argument or arguments which have a value of a function.

```javascript
function higherOrderFunction(param, callback) {
  return callback(param);
}
```


What are Higher Order Functions?

JavaScript's += operator is a handy shorthand for adding a value to a variable and reassigning the result. Learn more about this and how to use it.

What is the JavaScript += Operator and How Do You Use It?

Learn how to use the startsWith() method in JavaScript to check if a string begins with a specified set of characters.

Using the startsWith() Method in JavaScript

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Reverse a String in JavaScript: 2 Easy Methods

Event Target is a property of an event object in JavaScript that refers to the element that triggered the event.

What is event.target in JavaScript?

Discover how to prevent the default behavior of an element and stop event propagation in JavaScript using the preventDefault and stopPropagation.

Difference Between preventDefault and stopPropagation in JavaScript

Learn about the !! operator in JavaScript and its uses for truthy/falsy values, defined/undefined variables, empty arrays and value conversion.

What does the !! operator do in JavaScript?

JavaScript is a multi-paradigm language, supporting imperative/procedural programming along with OOP and functional programming.

Two programming paradigms in JavaScript?

In JavaScript, two objects are considered equal only if they are the same object, not just if they have the same properties and values.