jquery select怎樣添加選項(xiàng)

小樊
86
2024-10-15 10:34:59

要在jQuery的<select>元素中添加選項(xiàng),您可以使用append()val()方法。以下是兩種方法的示例:

方法1:使用append()方法向<select>元素添加選項(xiàng):

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Add Option</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <select id="mySelect">
        <option value="option1">Option 1</option>
        <option value="option2">Option 2</option>
    </select>

    <button id="addButton">Add Option</button>

    <script>
        $("#addButton").click(function() {
            $("#mySelect").append("<option value='newOption'>New Option</option>");
        });
    </script>
</body>
</html>

方法2:使用val()方法向<select>元素添加選項(xiàng)(此方法需要先將<select>元素的值設(shè)置為空):

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Add Option</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <select id="mySelect">
        <option value="option1">Option 1</option>
        <option value="option2">Option 2</option>
    </select>

    <button id="addButton">Add Option</button>

    <script>
        $("#addButton").click(function() {
            $("#mySelect").val(''); // 清空現(xiàn)有選項(xiàng)
            $("#mySelect").append("<option value='newOption'>New Option</option>");
        });
    </script>
</body>
</html>

在這兩個(gè)示例中,當(dāng)用戶點(diǎn)擊"Add Option"按鈕時(shí),將向<select>元素添加一個(gè)新的選項(xiàng)。

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