JavaScript

JavaScript Intro

JavaScript Intro Quiz

JavaScript Intro Exercise

JavaScript Basic

JavaScript Basic Quiz

JavaScript Basic Exercise

JavaScript Advance

JavaScript Advance Quiz

JavaScript Advance Exercise

JavaScript ES6

JavaScript ES6 Quiz

JavaScript ES6 Exercise

JavaScript Array Methods and Properties

JavaScript String Methods and Properties

JavaScript Number Methods and Properties

JavaScript Math Properties and Methods

JavaScript Date Methods and Properties

JavaScript Global Methods and Properties

JavaScript RegExp Properties and Methods

JavaScript Class Methods and Keywords

JavaScript Errors, JSON and Booleans

JavaScript Statements

JavaScript Window History Object Properties and Methods

JavaScript Window Location Object Properties and Methods

JavaScript Window Screen Object Properties

JavaScript Window Navigator Object Properties and Methods

JavaScript Window Object Properties and Methods

JavaScript Console Object Methods

JavaScript Geolocation and Storage APIs

JavaScript CSSStyleDeclaration Object Methods and Properties

HTML DOM Documents Object Properties and Methods

DOM HTMLCollection Properties and Methods

HTML DOM Attributes Properties and Methods

HTML DOM Elements Properties and Methods

HTML DOM Style Object Properties

HTML DOM AnimationEvent Properties and Methods

HTML DOM ClipboardEvent Properties and Methods

HTML DOM DragEvent Properties and Methods

HTML DOM FocusEvent Properties and Methods

HTML DOM HashChangeEvent Properties and Methods

HTML DOM InputEvent Properties and Methods

HTML DOM KeyboardEvent Properties and Methods

HTML DOM MouseEvent Properties and Methods

HTML DOM PageTransitionEvent Properties and Methods

HTML DOM ProgressEvent Properties and Methods

HTML DOM StorageEvent Properties and Methods

HTML DOM TransitionEvent Properties and Methods

HTML DOM WheelEvent Properties and Methods

HTML DOM UiEvent Properties and Methods

HTML DOM TouchEvent Properties and Methods

The Event Object Properties and Methods

HTML DOM FocusEvent Properties and Methods

List of HTML DOM FocusEvent Properties and Methods

FocusEvent relatedTarget Property
The relatedTarget property is a read-only property and it returns an element related to the element that triggered the focus or blur event.
onblur Event in JavaScript
The onblur event fires the moment that the element loses focus. Onblur is most often used with form validation code.
onfocus Event in JavaScript
The onfocus attribute fires the moment that the element gets focused. It is mostly used on input and select elements.
onfocusin Event in JavaScript
The onfocusin event is used to occur when an element is about to get focused. It is similar to onfocus event.
onfocusout Event in JavaScript
The onfocusout event is used to occur when an element is about to lose focus. It is similar to onblur event.