funkciókifejezésre

Funkciókifejezés, or function expression in English, is a way to define a function in JavaScript where the function is created as part of an expression, rather than as a standalone declaration. Unlike function declarations, function expressions are not hoisted to the top of their scope. This means a function expression cannot be called before its definition appears in the code.

A function expression assigns an anonymous function (a function without a name) or a named function to a variable. For example, an anonymous function expression would look like this: `const myFunction = function() { /* code */ };`. This `myFunction` variable now holds a reference to the function. A named function expression, while less common for practical use, can be defined as: `const myFunction = function namedFunction() { /* code */ };`. The name `namedFunction` is only accessible within the function itself.

The primary advantage of function expressions is their flexibility. They can be used to create immediately invoked function expressions (IIFEs), pass functions as arguments to other functions (callbacks), or define methods on objects. They are a fundamental concept in JavaScript for managing scope and creating dynamic behavior. The difference in hoisting behavior compared to function declarations is a key distinction to remember when writing JavaScript code.