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How can I get the ID of an element using jQuery?

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伪装坚强ぢ
伪装坚强ぢ 2020-11-22 11:57

Why doesn\'

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19条回答
  • 感情败类
    2020-11-22 12:07

    Above answers are great, but as jquery evolves.. so you can also do:

    var myId = $("#test").prop("id");
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  • 无人共我
    2020-11-22 12:07

    $('#test').attr('id') In your example:

    <div id="test"></div>

$(document).ready(function() {
    alert($('#test').attr('id'));
});
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  • 半阙折子戏
    2020-11-22 12:13

    This can be element id , class , or automatically using even

    ------------------------
$(this).attr('id');
=========================
------------------------
$("a.remove[data-id='2']").attr('id');
=========================
------------------------
$("#abc1'").attr('id');
=========================
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  • 自闭症患者
    2020-11-22 12:19

    $('#test') returns a jQuery object, so you can't use simply object.id to get its Id

    you need to use $('#test').attr('id'), which returns your required ID of the element

    This can also be done as follows ,

    $('#test').get(0).id which is equal to document.getElementById('test').id

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  • 猫巷女王i
    2020-11-22 12:19 
    <html>
<head>
  <link rel="stylesheet"href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    </head>
<?php
    // include Database connection file 
    include("db_connection.php");

    // Design initial table header 
    $data = '<table class="table table-bordered table-striped">
                        <tr>
                            <th>No.</th>
                            <th>First Name</th>
                            <th>Last Name</th>
                            <th>Email Address</th>
                            <th>Update</th>
                            <th>Delete</th>
                        </tr>';
    $query = "SELECT * FROM users";
    if (!$result = mysqli_query($con, $query)) {
        exit(mysqli_error($con));
    }
    // if query results contains rows then featch those rows 
    if(mysqli_num_rows($result) > 0)
    {
        $number = 1;
        while($row = mysqli_fetch_assoc($result))
        {
            $data .= '<tr>
                <td>'.$number.'</td>
                <td>'.$row['first_name'].'</td>
                <td>'.$row['last_name'].'</td>
                <td>'.$row['email'].'</td>
                    <td><button onclick="DeleteUser('.$row['id'].')" class="btn btn-danger">Delete</button>
                </td>
            </tr>';
            $number++;
        }
    }

    else
    {
        // records now found 
        $data .= '<tr><td colspan="6">Records not found!</td></tr>';
    }

    $data .= '</table>';
    echo $data;
?>

<script type="text/javascript">

    function DeleteUser(id) {
    var conf = confirm("Are you sure, do you really want to delete User?");
    if (conf == true) {
        $.ajax({
                    url:'deleteUser.php',
                    method:'POST',
                    data:{
                        id:id
                    },
            success:function(data){
                      alert('delete successfully');
                   }




}
});

deleteUser.php

<?php
// check request
if(isset($_POST['id']) && isset($_POST['id']) != "")
{
    // include Database connection file
    include("db_connection.php");

    // get user id
    $user_id = $_POST['id'];

    // delete User
    $query = "DELETE FROM users WHERE id = '$user_id'";
    if (!$result = mysqli_query($con, $query)) {
        exit(mysqli_error($con));
    }
}
?>
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  • 借酒劲吻你
    2020-11-22 12:19

    Important: if you are creating a new object with jQuery and binding an event, you MUST use prop and not attr, like this:

    $("<div/>",{ id: "yourId", class: "yourClass", html: "<span></span>" }).on("click", function(e) { alert($(this).prop("id")); }).appendTo("#something");

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