Basic event methods: 1. click(), set the mouse click event; 2. dblclick(), set the mouse double-click event; 3. change(), set the content change event; 4. focus(), Set the trigger focus event; 5. blur(), set the focus loss event; 6. mousedown(), etc.
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
Event method trigger or add a function to the event handler of the selected element.
The following table lists some jQuery methods for handling events.
| Method | Description |
|---|---|
| bind() | Add an event handler to an element |
| blur() | Add/trigger lost focus event |
| change() | Add/ Trigger change event |
| click() | Add/trigger click event |
| dblclick() | Add/trigger double click event |
| die() | was removed in version 1.9. Remove all event handlers added through the live() method |
| focus() | Add/trigger focus event |
| focusin() | Add event handler to focusin event |
| focusout() | Add event handler to focusout event |
| hover() | Add two event handlers to the hover event |
| keydown() | Add /Trigger keydown event |
| keypress() | Add/Trigger keypress event |
| keyup() | Add/trigger keyup event |
| live() | Removed in version 1.9. Add one or more event handlers to the current or future selected elements |
| mousedown() | Add/trigger the mousedown event |
| mouseenter() | Add/trigger mouseenter event |
| mouseleave() | Add/trigger mouseleave event |
| mousemove() | Add/trigger mousemove event |
| mouseout() | Add/trigger mouseout event |
| mouseover() | Add/trigger mouseover event |
| mouseup() | Add/trigger mouseup Event |
| off() | Remove the event handler added through the on() method |
| on() | Add event handlers to elements |
| one() | Add one or more event handlers to the selected element. This handler can only be triggered once per element |
| ready() | Specifies the function to be executed when the DOM is fully loaded |
| toggle() | Removed in version 1.9. Add two or more functions to switch between click events |
| trigger() | Trigger all events bound to the selected element |
| triggerHandler() | Trigger all functions bound to the specified event of the selected element |
| unbind() | Remove the added event handler from the selected element |
| #undelegate() | Remove the event handler from the current or future selected element program |
1. The above event function has three usages:
//直接绑定事件到元素上
$('.target1').keydown(function(e) {
$("em:first").text(e.target.value) //通过对象e获取输入的值
});
//传递参数调用函数处理
$("#test").click(11111,function(e) {
//this指向 div元素
//e.data => 11111 通过e传递参数数据
});
//手动触发已绑定的点击事件
$elem.click()2. The difference between mouseover and mouseenter: regardless of whether the mouse pointer passes through the selected element or other Child elements will trigger the mouseover event, which is called supporting bubble processing. Bubble processing refers to an event jointly defined by the child element and the parent element. When the child element is triggered, or the child element is not defined, the event will Propagated to the parent, causing the parent event to be triggered. The mouseenter event is only fired when the mouse pointer passes over the selected element.
3. The form element has a default behavior of submitting the form. If it is processed through submit, this default behavior of the browser needs to be disabled. The traditional way is to call the event object e.preventDefault() to handle it. In jQuery, you can directly return false at the end of the function.
//回车键或者点击提交表单后禁止浏览器默认跳转：
$('#target2').submit(function() {
alert('捕获提交表达动作,阻止页面跳转')
return false;
});4. Use on()
Basic usage: .on(events,[selector],[data])
The most common way to bind a click to an element Event, compare the difference between shortcut and on method
$("#elem").click(function(){}) //快捷方式
$("#elem").on('click',function(){}) //on方式
//多个事件绑定同一个函数，通过空格分离，传递不同的事件名，可以同时绑定多个事件
$("#elem").on("mouseover mouseout",function(){ });
//多个事件绑定不同函数
$("#elem").on({
mouseover:function(){},
mouseout:function(){}
});
//将数据传递到处理程序
$( "button" ).on( "click", { //第二个参数传递数据给函数调用
name: "Mr.Tory"
}, greet );
function greet( event ) {
alert( "Hello " + event.data.name ); //输出Hello Mr.Tory
}.type | Event type. If you use an event handling function to handle multiple events, you can use this property to get the event type, such as click |
| ##.data | Extra parameters are passed in when the event is called |
| .target | The DOM element that triggered the event |
| .which | indicates which one was pressed Key or button |
| .timeStamp | This property returns the time from January 1, 1970 to the time of the event Number of milliseconds |
| Mouse position relative to the left/top edge of the document | |
| The value returned by the previous same event handler function | |
| Default action to prevent events | |
| Cancel event bubbling |
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