7*4 2008-10-16 15:28 采纳率: 50%
浏览 121
已采纳

在 jQuery 中移除事件处理程序的最佳方法?

I have an input type="image". This acts like the cell notes in Microsoft Excel. If someone enters a number into the text box that this input-image is paired with, I setup an event handler for the input-image. Then when the user clicks the image, they get a little popup to add some notes to the data.

My problem is that when a user enters a zero into the text box, I need to disable the input-image's event handler. I have tried the following, but to no avail.

$('#myimage').click(function { return false; });

转载于:https://stackoverflow.com/questions/209029/best-way-to-remove-an-event-handler-in-jquery

  • 写回答

17条回答 默认 最新

  • 叼花硬汉 2008-10-16 21:13
    关注

    jQuery ≥ 1.7

    With jQuery 1.7 onward the event API has been updated, .bind()/.unbind() are still available for backwards compatibility, but the preferred method is using the on()/off() functions. The below would now be,

    $('#myimage').click(function() { return false; }); // Adds another click event
    $('#myimage').off('click');
    $('#myimage').on('click.mynamespace', function() { /* Do stuff */ });
    $('#myimage').off('click.mynamespace');
    

    jQuery < 1.7

    In your example code you are simply adding another click event to the image, not overriding the previous one:

    $('#myimage').click(function() { return false; }); // Adds another click event
    

    Both click events will then get fired.

    As people have said you can use unbind to remove all click events:

    $('#myimage').unbind('click');
    

    If you want to add a single event and then remove it (without removing any others that might have been added) then you can use event namespacing:

    $('#myimage').bind('click.mynamespace', function() { /* Do stuff */ });
    

    and to remove just your event:

    $('#myimage').unbind('click.mynamespace');
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(16条)

报告相同问题?

悬赏问题

  • ¥15 Arcgis相交分析无法绘制一个或多个图形
  • ¥15 seatunnel-web使用SQL组件时候后台报错,无法找到表格
  • ¥15 fpga自动售货机数码管(相关搜索:数字时钟)
  • ¥15 用前端向数据库插入数据,通过debug发现数据能走到后端,但是放行之后就会提示错误
  • ¥30 3天&7天&&15天&销量如何统计同一行
  • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题
  • ¥20 云服务Linux系统TCP-MSS值修改?
  • ¥20 关于#单片机#的问题:项目:使用模拟iic与ov2640通讯环境:F407问题:读取的ID号总是0xff,自己调了调发现在读从机数据时,SDA线上并未有信号变化(语言-c语言)