<div id="test"></div>
<script>
$(document).ready(function() {
alert($('#test').id);
});
</script>
为什么上面的方法不起作用,我应该怎么做?
<div id="test"></div>
<script>
$(document).ready(function() {
alert($('#test').id);
});
</script>
为什么上面的方法不起作用,我应该怎么做?
当前回答
如果您想获取一个元素的ID,比如说通过类选择器,当在该特定元素上触发事件(在本例中为单击事件)时,以下操作将完成此任务:
$('.your-selector').click(function(){
var id = $(this).attr('id');
});
其他回答
以上答案很好,但随着jquery的发展。。因此,您还可以执行以下操作:
var myId = $("#test").prop("id");
嗯,似乎还没有解决方案,我想提出我自己的解决方案,这是JQuery原型的扩展。我将其放在JQuery库之后加载的Helper文件中,因此检查window.JQuery
if (window.jQuery) {
$.prototype.id = function () {
if (this.length > 1) {
var val = [];
this.each(function (idx, el) {
val.push($(el).id());
});
return val;
} else {
return this.attr('id');
}
}
}
它可能并不完美,但它可能是JQuery库的一个开始。
返回单个字符串值或字符串值数组。字符串值数组用于使用多元素选择器的事件。
$.fn.extend({
id : function() {
return this.attr('id');
}
});
alert( $('#element').id() );
当然需要一些检查代码,但很容易实现!
$(“#按钮”).click(函数){var clickID=$(“#testDiv”).attr(“id”);console.log(clickID)});<script src=“https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js“></script><div id=“testDiv”>单击按钮时,您将获得该id值</div><button id=“button”>按钮</button>
<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));
}
}
?>