jQuery中鼠标事件mousexxx的执行顺序

末蓝、 2022-02-28 18:12 325阅读 0赞

## jQuery语句模板 ##

`$(selector).action(...)`  
如：`<button>`的`鼠标单击事件`：

$("button").click(function() {
      // statements;
    });

以下几种鼠标事件用法相似。

## jQuery 鼠标事件顺序 ##

`mouseenter` 鼠标移入元素上方  
`mouseover` 鼠标在元素上方  
`mousemove` 鼠标在元素上方且移动。  
`mouseout` 鼠标出了元素边界  
`mouseleave` 鼠标完全离开元素  
![在这里插入图片描述][20190402200118309.png]  
`mousedown` 按下鼠标  
`mouseup` 松开鼠标

`hover(afterOverFn, afterLeaveFn)` `afterOverFn`在`mouseover`之后触发，`afterLeaveFn`在`mouseleave`之后触发。  
顺序：`enter` \-> `over` \-> `move`(多次) -> `out` \-> `leave`  
按键顺序：`down` \-> `up`

## html code ##

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>jQuery-事件测试</title>
        
        <script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
        
        
        <script>
            // $(document).ready(fn)的简写。
            $(function() {
                mouseEventTest();
            });
            function mouseEventTest() {
                // enter, over, move, out, leave,
                // down, up
                $("#mouseTest").mouseenter(function() {
                    console.log("mouse enter");
                });
                $("#mouseTest").mouseleave(function() {
                    console.log("mouse leave");
                });
    
                $("#mouseTest").mouseover(function() {
                    console.log("mouse over");
                });
                $("#mouseTest").mouseout(function() {
                    console.log("mouse out");
                });
    
                $("#mouseTest").mousemove(function() {
                    console.log("mouse move");
                });
    
                $("#mouseTest").mousedown(function() {
                    console.log("mouse down");
                });
                $("#mouseTest").mouseup(function() {
                    console.log("mouse up");
                });
            }
        </script>
    </head>
    <body>
        <div id="mouseTest" style="border:1em solid pink">鼠标事件</div>
        <p>鼠标事件顺序：enter, over, move(多次), out, leave</p>
        <p>鼠标点击：down, up</p>
    </body>
    </html>

页面：  
![页面][20190328135012713.png]  
移动鼠标至div上方，移出，点击鼠标左键。  
测试结果：  
![jQuery鼠标事件顺序][jQuery]

## `hover(afterOverFn, afterLeaveFn)` ##

修改：

$(function() {
        mouseEventTest();
    });

为：

$(function() {
        mouseEventTest();
        // $(selector).hover(overFn, leaveFn);
        $("#mouseTest").hover(
            function afterMouseOver() {
                console.log("hover afterMouseOver");
            },
            function afterMouseLeave() {
                console.log("hover afterMouseLeave");
            }
        );
    });

测试：  
![hover(afterOverFn, afterLeaveFn测试)][hover_afterOverFn_ afterLeaveFn]

[20190402200118309.png]: /images/20220227/6d395e854e3846a592a661717755387c.png
[20190328135012713.png]: /images/20220227/6d7eccbd12ec47fea375add4759c695c.png
[jQuery]: /images/20220227/cf797d2e1037422396293a3e01ac0508.png
[hover_afterOverFn_ afterLeaveFn]: /images/20220227/a82d6d5d4de64f7e81c95b19f66d8446.png