Reverse or hide jQuery ajax for input checkbox results - php

Question

I don't have good knowledge about jquery, so I have a code working good but their problem, is to hide the result when uncheck the checkbox .( check to get the results from the database - uncheck hide these results )
catfd.php code
<input type="checkbox" value="2" class="catcf"> catfd2 <br />
<input type="checkbox" value="35" class="catcf"> catfd35 <br />
<input type="checkbox" value="22" class="catcf"> catfd22 <br />
<input type="checkbox" value="133" class="catcf"> catfd133 <br />
<input type="checkbox" value="28" class="catcf"> catfd28 <br />
<input type="checkbox" value="33" class="catcf"> catfd33 <br />
<input type="checkbox" value="55" class="catcf"> catfd55 <br />
<input type="checkbox" value="44" class="catcf"> catfd44 <br />
<div class="main-area-courses-continer">
<!-- here will echo the results -->
</div>
jquery ajax code get the result from PHP page 'getvalue.php'
if(isset($_POST['catcf'])){
?>
<div class="main-area-courses-continer" >
<?php
$catcfid= $_POST['catcf'];
$sql = 'SELECT * FROM tablename where cat_id = '.$catcfid.' order by p_id asc';
$catandproid = $wpdb->get_results($sql);
foreach($catandproid as $key){
/////////////////////////////////Updates
?>
<div class="<?php echo $catcfid; ?>" >
<?php
echo $key->title;
?>
</div><!-- End of Continer catcfid -->
<?php
////////////////////////////////////////////
}
}
?>
</div>
and the is the ajax jquery code
$(document).ready(function() {
$(".catcf").on('click', function() {
if ($('input.catcf').is(':checked')) {
var catcf = Number($(this).val());
$.ajax({
url: 'getvalue.php',
type: 'post',
data: {
catcf: catcf
},
beforeSend: function() {
$(".main-area-courses-continer").html("Looding....");
},
success: function(response) {
// Setting little delay while displaying new content
setTimeout(function() {
// appending posts after last post with class="post"
$(".main-area-courses-continer:last").after(response).show().fadeIn("slow");
$(".main-area-courses-continer").html("");
}, 2000);
}
});
}
});
});

Answer 1

You can check if the div with class="catcfid" exist in your DOM or not using $(".main-area-courses-continer > ." + catcf).length == 0 if the length is 0 means there is no such div then you can make ajax request to bring that from backend else just show that div using $("." + catcf).parent().show(); else if unchecked hide that div using $("." + catcf).parent().show(); .
Demo Code :
$(document).ready(function() {
$(".catcf").on('click', function() {
var catcf = Number($(this).val());
if ($(this).is(':checked')) {
//check if the div with class catcf is not there
if ($(".main-area-courses-continer > ." + catcf).length == 0) {
/*.ajax({
url: 'getvalue.php',
type: 'post',
data: {
catcf: catcf
},
beforeSend: function() {
$(".main-area").html("Looding....");
},
success: function(response) {*/
setTimeout(function() {
//$(".main_container:last").after(response).show().fadeIn("slow");
//dummy data append ..
$(".main_container:last").after('<div class="main-area-ourses-continer"><div class="' + catcf + '">catfd' + catcf + ' data....</div> </div>')
$(".main-area").html("")//empty loading ..
}, 100);
/*
});*/
} else {
//show that class
$("." + catcf).parent().show();
}
} else {
//hide that class means unchecked
$("." + catcf).parent().hide()
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="checkbox" value="2" class="catcf" checked> catfd2 <br />
<input type="checkbox" value="35" class="catcf"> catfd35 <br />
<input type="checkbox" value="22" class="catcf" checked> catfd22 <br />
<input type="checkbox" value="133" class="catcf"> catfd133 <br />
<input type="checkbox" value="28" class="catcf"> catfd28 <br />
<input type="checkbox" value="33" class="catcf"> catfd33 <br />
<input type="checkbox" value="55" class="catcf" checked> catfd55 <br />
<input type="checkbox" value="44" class="catcf"> catfd44 <br /> Datas :
<!--put this div for loading separtely-->
<div class="main-area"></div>
<div class="main_container">
<div class="main-area-courses-continer">
<div class="2">
catfd2 data....
</div>
</div>
<div class="main-area-courses-continer">
<div class="22">
catfd22 data....
</div>
</div>
<div class="main-area-courses-continer">
<div class="55">
catfd55 data....
</div>
</div>
</div>

Answer 2

Just change the QUERY, and I think that's the issue
$sql = 'SELECT * FROM tablename Where cat_id = '.$catcfid.' And status = '1' order by p_id ASC';