ITC C301 - 201BA Blogging Activity - JavaScript Event Handlers

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JavaScript  Events
ITC C301

HTML events are things that are happening to HTML Elements and JavaScript is used for HTML pages in order to react to these events.  These said events can be either what the browser does or a user does. Here are examples of these:

-HTML web page has finished loading

-HTML input field was changed

-HTML button was clicked

JavaScript Events will always have event handler in which it has a set of code that will be usually a JavaScript function that you will construct and it will be triggered once the event occurs. Event handlers are codes that are defined to run in response to an event.

Some of common HTML Events:

  • OnChange
    • Occurs when the value of an element has been changed. Examples are when radio buttons and check boxes states are changed.
  • Onblur
    • Occurs when an object loses focus or when a user leaves a form field.
  • Onselect
    • Occurs when a text is being selected in an element.
  • OnMouseOut
    • Occurs when the user moves the mouse away from an HTML element
  • OnKeyDown
    • Occurs when a user pushes a keyboard key
  • OnLoad
    • Occurs when the browser has finished loading the page
These are examples of common JavaScript Event handlers that are used in order to improve the quality and interaction of your HTML elements in order to alert, notify or prevent the user from interacting in your Web page.



Written by: Vince Cedrick A. Caridad
                     BSIT-201BA



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