你如何在jQuery中处理oncut，oncopy和onpaste？

Question

The jQuery documentation says the library has built-in support for the following events: blur, focus, load, resize, scroll, unload, click, dblclick, mousedown, mouseup, mousemove, mouseover, mouseout, mouseenter, mouseleave, change, select, submit, keydown, keypress, keyup, and error.

I need to handle cut, copy, and paste events. How best to do that? FWIW, I only need to worry about WebKit (lucky me!).

UPDATE: I'm working on a "widget" in a Dashboard-like environment. It uses WebKit, so it only really matters (for my purposes) whether these events are supported there, which it looks like they are.

Answer 1

You can add and remove events of any kind by using the .on() and off() methods

Try this, for instance

jQuery(document).on('paste', function(e){ alert('pasting!') });

jQuery is actually quite indifferent to whether the event type you assign is supported by the browser, so you can assign arbitrary event types to elements (and general objects) such as:

jQuery('p').on('foobar2000', function(e){ alert(e.type); });

In case of custom event types, you must .trigger() them "manually" in your code, like this:

jQuery('p').trigger('foobar2000');

Neat eh?

Furthermore, to work with proprietary/custom DOM events in a cross-browser compatible way, you may need to use/write an "jQuery event plugin" ... example of which may be seen in jquery.event.wheel.js Brandon Aaron's Mousewheel plugin

Answer 2

Various clipboard events are available in Javascript, though support is spotty. QuicksMode.org has a compatibility grid and test page . The events are not exposed through jQuery, so you'll either have to extend the library or use native Javascript events.

Answer 3

Mozilla supports an "input" event which I'm having trouble finding useful documentation for. At the very least, I know it fires on paste.

   this.addEventListener('input',
    function(){//stuff here},
    false
   );

Answer 4

As jQuery 1.7 you can use bind(...) and unbind(...) methods for attaching and removing respectively handlers.

Here are examples align your questuion:

$('#someElementId').bind('paste', function(){return false;});

- this one will block any attempts to paste from clipboard into element body. You can use also cut , copy and others as event types (see links bellow)

$('#someElementId').bind('copy', function(){return alert('Hey fella! Do not forget about copyrights!');});

So, in other cases, when you want to remove those handlers, you can use unbind() method:

$('#someElementId').unbind('copy');

Here some useful links:

• bind()
• unbind()
• full list of event types