jQuery | one() 与示例

one() 方法是 jQuery 中的一种内置方法，可为所选元素附加一个或多个事件处理程序。这还附加了一个在事件发生时运行的函数。此方法命名为 one，因为附加到此方法的任何事件处理程序都将只运行一次。

句法：

$(selector).one(event, data, function)

参数：此方法接受上面提到的三个参数，如下所述：

• 事件：它是必需的参数。它用于指定要附加到元素的一个或多个事件。如果给出多个事件，则使用空格将它们分开。
• 数据：它是可选参数。它用于指定要传递给函数的附加数据。
• 函数：它是必需的参数。它用于指定事件发生时要运行的函数。

返回值：此方法返回具有指定事件处理程序的选定元素。

程序：

    
        
        
        
              
            // jQuery code to show the working of this method
            $(document).ready(function() {
                $("p").one("click", function() {
                    $(this).animate({
                        fontSize: "+=14px"
                    });
                });
            });
        
        
            .para {
                margin: auto;
                width: 80%;
                border: 3px solid green;
                padding: 10px;
                text-align:justify;
            }
            .gfg {
                font-size:40px;
                color:green;
                font-weight:bold;
                text-align:center;
            }
            .geeks {
                font-size:17px;
                text-align:center;
            }
        
    
       
    
        
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输出：