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• Function

  A function is a code snippet that can be called by other code or by itself, or a variable that refers to the function. When a function is called, arguments are passed to the function as input, and the function can optionally return an output. A function in JavaScript is also an object.

  developer.mozilla.org/en-US/docs/Glossary/Function

• First-class Function

  A programming language is said to have First-class functions when functions in that language are treated like any other variable. For example, in such a language, a function can be passed as an argument to other functions, can be returned by another function and can be assigned as a value to a variable.

  developer.mozilla.org/en-US/docs/Glossary/First-class_Function

• Exported WebAssembly functions

  Exported WebAssembly functions are how WebAssembly functions are represented in JavaScript. This article describes what they are in a little more detail.

  developer.mozilla.org/en-US/docs/WebAssembly/Exported_functions

• Functions

  Generally speaking, a function is a "subprogram" that can be called by code external (or internal in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function, and the function will return a value.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions

• Functions

  Functions are one of the fundamental building blocks in JavaScript. A function is a JavaScript procedure—a set of statements that performs a task or calculates a value. To use a function, you must define it somewhere in the scope from which you wish to call it.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions

• Function

  The Function constructor creates a new Function object. Calling the constructor directly can create functions dynamically, but suffers from security and performance issues similar to eval.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function

• function*

  The function* declaration (function keyword followed by an asterisk) defines a generator function, which returns a Generator object.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*

• Function.prototype

  The Function.prototype property represents the Function prototype object.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/prototype

• function declaration

  The function declaration defines a function with the specified parameters.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function

• Function.caller

  The function.caller property returns the function that invoked the specified function. This property is forbidden in strict model due to tail call optimization.

  developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/caller