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Factory Function in JavaScript
A factory function is a regular function that uses the return keyword to produce a new object whenever you invoke it with a different argument.
In other words, a factory function serves as a template for producing new JavaScript objects.
Here’s an example:
// Define a factor function:function createName(name) { return { name };}
// Create an object from the createName() factory:const bestWebsite = createName("CodeSweetly");
// Create another object from the createName() factory:const author = createName("Oluwatobi");
// Create a third object from the createName() factory:const sweetColor = createName("Pink");
// Check bestWebsite's content:bestWebsite;
// The invocation above will return:{ name: "CodeSweetly";}
// Check author's content:author;
// The invocation above will return:{ name: "Oluwatobi";}
// Check sweetColor's content:sweetColor;
// The invocation above will return:{ name: "Pink";}The createName() function is a factory function because:
- It uses the
returnkeyword to produce its object. - It creates a new object whenever you invoke it with a different argument.
Fake in Test-Driven Development
Fake is a test double used to create a working test implementation of an external dependency with dynamic values.
Falsy in JavaScript
Falsy values are values JavaScript considers to be false.
The seven falsy values in JavaScript are: 0 (zero), false, "" (empty string), NaN, null, undefined, and 0n (BigInt zero).
File Path (URL)
A URL’s file path is the path (route) to a website’s resource on a web server.
filter() in JavaScript
filter() creates a new array that contains all the calling array’s elements that passed the test specified by the method’s function argument.
First-Class Function
A first-class function is a function you can:
Fisher-Yates Shuffle
Fisher-Yates shuffle is an algorithm for generating random arrangements of an array.
Flags (RegExp)
Flags are operators used to specify how you want the computer to interpret a regular expression pattern.
Floating Element in CSS
A floating element is one whose float property’s value is not none.
Font
A font is a specific style used to alter a text’s appearance.
for…in Loop Statement in JavaScript
A for…in loop instructs the computer to loop through each property in a given object.
for…of Loop Statement in JavaScript
A for…of loop instructs the computer to loop through each of an iterable object’s values.
forEach() in JavaScript
The forEach() method executes its function argument once for each item of the calling array.
Fragmentation Properties in CSS
The CSS fragmentation properties specify how browsers should display fragmented (divided) content.
Framework
A framework is a codebase written to serve as the primary structure for your application.
Function Body
A function’s body is where you place a sequence of statements you want to execute.
Function Component
A function component is a regular JavaScript function that can accept a single properties object (props) as its parameter and emits a React element as its return value.
Function Declaration in JavaScript
A function declaration is a function created without assigning it to a variable.
Function Definition in JavaScript
A function definition is a function created without assigning it to a variable.
Function Expression in JavaScript
A function expression is a function that you create and assign to a variable.
Function in JavaScript
A JavaScript function is an executable piece of code developers use to bundle a block of zero or more statements.
function Keyword in JavaScript
A function keyword declares to browsers that a specific piece of code is a JavaScript function—not a mathematical or other generic function.
Function Name
A function’s name allows you to create an identifier for your function, which you can use to reference it.
Function Statement in JavaScript
A function statement is a function created without assigning it to a variable.
Function’s Body in JavaScript
A function’s body is where you place a sequence of statements that you want to execute.