Solved

Is there reference for the javascript event handler arguments?

Posted on 2015-02-11
6
92 Views
Last Modified: 2015-03-09
Hi Experts,

I am playing with HTML5 and javascript. I can find a very complete list of events in HTML5 elements (http://www.w3schools.com/tags/ref_eventattributes.asp). However, when I try to find out what these events can do, I found that it should be helpful if I have reference documents for the event handler arguments.

For example, if doMouseDown(event) function is the event handler of the mouse-down event of an element, then the event parameter should have pageX and pageY properties accessible in the handler.

Is there such a reference document? Where can I get it?
Thank you!
0
Comment
Question by:huangs3
  • 3
  • 3
6 Comments
 
LVL 9

Accepted Solution

by:
Brian Tao earned 500 total points
ID: 40604842
0
 

Author Comment

by:huangs3
ID: 40606317
Hi Brian,

In this link I can see the names of the events, but how do I know the accessible properties of the event argument?
For example, I can find that there is an "onmousedown" event, but how can I efficiently find out the event handler argument (let's say it is named "arg") has properties arg.pageX and arg.pageY returning the mouse coordinates?

Thank you!
0
 
LVL 9

Expert Comment

by:Brian Tao
ID: 40607727
The upper part of the page is like what you said, and events are categorized under sections.
In the lower part of the page, there are other sections for event methods and properties (which you called event arguments). They are with subjects "Event Object", "MouseEvent Object", "KeyboardEvent Object", ... and so on

All event handlers are passed with one argument, the event object.  With the argument (usually we put it as an "e", e.g. doMouseDown(e) using your example) you can get e.altKey, e.button, e.clientX, e.clientY, ... etc.
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:huangs3
ID: 40654999
Brian's link doesn't show all the event object properties, but with the provided keyword "Event Object" I could find more references, such as:
http://www.javascriptkit.com/domref/domevent.shtml
http://www.javascriptkit.com/jsref/event.shtml
https://developer.mozilla.org/en/docs/Web/API/Event

Thank you!
0
 

Author Closing Comment

by:huangs3
ID: 40655003
sorry for the late response due to some perturbation on my side
0
 
LVL 9

Expert Comment

by:Brian Tao
ID: 40655211
Thanks for the points.
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Allow a tab area under the contents 1 24
arrays and radio buttons 10 36
replacing inline javascript with jquery 4 44
15 puzzle in Javascript/html 2 36
Use these top 10 tips to master the art of email signature design. Create an email signature design that will easily wow recipients, promote your brand and highlight your professionalism.
When crafting your “Why Us” page, there are a plethora of pitfalls to avoid. Follow these five tips, and you’ll be well on your way to creating an effective page.
In this tutorial viewers will learn how to embed an audio file in a webpage using HTML5. Ensure your DOCTYPE declaration is set to HTML5: : The declaration should display (CODE) HTML5 is supported by the most recent versions of all major browsers…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question