JS Instance
| The code is as follows | Copy Code |
| <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/> <title> the user presses the keyboard to display keycode</title> <style> body{ Text-align:center; font:30px/1.5 5fae8f6f96c59ed1, Arial; } pre{color:green;padding:10px 15px;background: #f0f0f0; border:1px dotted #333; font:12px/1.5 Courier new;text-align: Left;} Span{color: #999;} </style> <script type= "Text/javascript" > Window.onload = function () { var OP = document.getElementsByTagName ("P") [0]; Document.onkeydown = function (event) { var event = Event | | window.event; op.innerhtml = Event.keycode; return False } } </script> <body> <p> here will show you press the key keycode</p> </body> |
|
Of course, we can also use jquery Event.which to get the user to press the keyboard value
Grammar
Event.which parameter Description
Event required. Specify the events to check. This event parameter comes from the event-binding function.
jquery discards the standard button attribute using which, which is a bit confusing.
Which is introduced by Firefox, IE does not support. Which is meant to get the keyboard's key value (KeyCode).
The which in jquery can be either the key value of the keyboard or the key value of the mouse.
That is, when the user to determine which button the keyboard can be used which, when the user to determine which button to press the mouse can also use which. It's dual.
| code is as follows | copy code |
| //Add which for Key Events if (Event.which = null && (event.charcode!= null | | event.keycode!= null)) { Event.which = Event.charcode!= null? Event.charCode:event.keyCode; } //Add which for click:1 = = left; 2 = = middle 3 = = right //Note:button are not normalized, so don ' t u Se it if (!event.which && event.button!== undefined) { Event.which = (Event.button & 1? 1: (Even T.button & 2? 3: (Event.button & 4? 2:0)); } |
|
The standard button uses 0,1,2 to represent the left, middle, and right keys of the mouse. The Which of jquery is used with 1,2,3.
It's also a bit of a bummer that the jquery document Event.which does not mention that which can represent the mouse button value, only refers to the keyboard key value. The comments in the source code are also misleading.
Add which for click:1 = = left; 2 = = middle; 3 = = Right
Note that here is the click, it is easy to let people use the click event, but actually click the event to get is wrong. Let's try this with the Click event:
| code is as follows | copy code |
| <! DOCTYPE html> |
|
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
