使用jQuery从handler中查找#ID

Question

How can I find an #[ID] using jQuery?

I have a handler that checks some info, I'm checking with jQuery if there is found a ID... But it always give back "Nothing" and it gives me the errors so it mean that there are errors!

I do it on this way...

jQuery:

posting.done(function(data){
    var warnings = $(data).find('.warnings');

    $('form#gastenboek').append(data);

    if (warnings.length > 0) {
        alert("errors")
    } else {
        alert("Nothing");
    }
});

Handler:

if (!empty($warning) && isset($warning))
{
    foreach($warning as $warning)
    {
        echo "<span id='warnings' style='color:orange;' class='glyphicon glyphicon-flag'></span><a style='color:orange;'>" . $warning . "</a><br>";
    }
}

Answer 1

You need to use find()

var warnings = $(data).find('#warnings');

Note : Id should be unique , use class instead

PHP:

if (!empty($warning) && isset($warning))
{
    foreach($warning as $warning)
    {
        echo "<span style='color:orange;' class='glyphicon glyphicon-flag warnings'></span><a style='color:orange;'>" . $warning . "</a><br>";
        //                                                                 --^-- adding class
    }
}

jQuery :

posting.done(function(data){
    var warnings = $(data).find('.warnings');

    $('form#gastenboek').append(data);

    if (warnings.length > 0) {
    //           --^-- getting count of elements
        alert("warnings")
    } else {
        alert("Nothing");
    }
});