效果展示
 
 html部分
 
<p class
="p-first">0
</p
>
<button class
="btn-first">cal-1
</button
>
<p class
="p-twice">0
</p
>
<button class
="btn-twice">cal-2
</button
>
 
script部分
 
 //第一个累加器
      
$('.btn-first').click
(function 
() {
          $('.p-first').text
(parseInt
($('.p-first').text
())+1
);
      })
     //第二个点击一次后失效
    
$('.btn-twice').one
("click",function 
() {
        $('.p-twice').text
(parseInt
($('.p-twice').text
())+1
);
    })
                
                
                
        
    
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