使用jQuery在单个元素上不引人注目的多个事件处理程序

Posted 2021-02-25

/*
Example of inline event handlers:
<input type="text" name="date" onchange="validateDate()" />
 
This is bad.
The purpose of markup is to describe a document's structure, not its programmatic behavior. And what if we need to set handlers for several events on a single element?
*/
 
// The unobtrusive solution:
 
<input type="text" name="date" id="date" />
 
/*
A script that runs when page is loaded into the browser, looks for relevant element(s) and set them up accordingly: (using jquery)
*/
 
var message = "mouse entered or left.";
 
// passing the variable in by value through eventData:
$('#date').bind('mouseenter mouseleave', {msg: message}, function(event) {
  alert(event.data.msg);
});