jQuery mousedown()方法

jQuery的mousedown()方法是一个内置的方法，当鼠标左键被压在选定的元素上时，它就会发挥作用。

语法:

$(selector).mousedown(function)

参数：该函数接受单参数function，这是可选的。它用于指定在mousedown事件被调用时要运行的函数。

例子1：这个例子说明了jQuery中的mousedown()方法。

<!DOCTYPE html>
<html>
  
<head>
    <title>The mousedown Method</title>
    <script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
    </script>
  
    <!-- jQuery code to show the working of this method -->
    <script>
         $(document).ready(function () {$ ("div").mousedown(function () {
                alert("Mouse left key was pressed");
            });
        });
    </script>
    <style>
        div {
            width: 200px;
            height: 40px;
            font-weight: bold;
            border: 2px solid green;
            padding: 20px;
        }
    </style>
</head>
  
<body>
    <!-- click on this button and pop up will appear-->
    <div>Welcome to GeeksforGeeks!</div>
</body>
  
</html>

输出:

jQuery mousedown()方法

例子2：在这个例子中，我们将通过使用mousedown()方法改变背景颜色。

<!DOCTYPE html>
<html>
  
<head>
    <title>The mousedown Method</title>
    <script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
    </script>
  
    <!-- jQuery code to show the working of this method -->
    <script>
         $(document).ready(function () {$ ("div").mousedown(function () {
                $("div").css(
                "background-color", "green");
            });
        });
    </script>
    <style>
        div {
            width: 200px;
            height: 40px;
            font-weight: bold;
            border: 2px solid black;
            padding: 20px;
        }
    </style>
</head>
  
<body>
    <!-- click on this button to change the background color-->
    <div>Welcome to GeeksforGeeks!</div>
</body>
  
</html>

输出:

jQuery mousedown()方法