版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/marcelwu/article/details/65629196
一、事件处理程序(event handler)
// Cross-browser event handler
var EventUtil = {
addHandler: function(element, type, handler) {
if (element.addEventListener) {
element.addEventListener(type, handler, false);
} else if (element.attachEvent) {
element.attachEvent('on' + type, handler);
} else {
element['on' + type] = handler;
}
},
getEvent: function(event) {
return event ? event : window.event;
},
getTarget: function(event) {
return event.target || event.srcElement;
},
preventDefault: function(event) {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
},
removeHandler: function(element, type, handler){
if (element.removeEventListener) {
element.removeEventListener(type, false);
} else if (element.detachEvent) {
element.detachEvent('on' + type, handler);
} else {
element['on' + type] = handler;
}
},
stopPropagation: function(event) {
event.stopPropagation ? event.stopPropagation() : (event.cancelBubble = true);
}
};