here is my perl script, am trying to make my page not to reload the whole page like the whole content on page, but only some part, some div in html. like when i delete user spinner displays after user deletion div reload and spinner also disappear after operation and i have used json. but i need help, some corrections. i know this is not json help sites or community. but anyone have idea can help me. i have got a free mysql hosting account for testing in the script, to be easier for the person to understand and easy correcting and help. thanks


main.pl

#!/usr/bin/perl -w

use CGI;
use DBI;
use Template;

my $cgi = CGI->new();
my $html = Template->new;


my $host =   "sql2.freemysqlhosting.net";
my $usr =    "sql2343290";
my $pwd =    "qV5*gE2%";
my $dbname = "sql2343290";

my $dbh = DBI->connect("DBI:mysql:$dbname:$host", $usr, $pwd, {
                                  AutoCommit => 0,
                                  RaiseError => 1, 
                                  }) or die $DBI::errstr;
                                  

my $select_names = $dbh->prepare("select id, name from names");
$select_names->execute();
my $names = $select_names->fetchall_arrayref();

$dbh->disconnect;

print "Content-type: text/html\n\n";
my $temp_html = <<START_HTML;

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery
+.min.js"></script>

<style>
#cover-spin {
    position:fixed;
    width:100%;
    left:0;right:0;top:0;bottom:0;
    background-color: rgba(255,255,255,0.7);
    z-index:9999;
    display:none;
}

@-webkit-keyframes spin {
    from {-webkit-transform:rotate(0deg);}
    to {-webkit-transform:rotate(360deg);}
}

@keyframes spin {
    from {transform:rotate(0deg);}
    to {transform:rotate(360deg);}
}

#cover-spin::after {
    content:'';
    display:block;
    position:absolute;
    left:48%;top:40%;
    width:40px;height:40px;
    border-style:solid;
    border-color:black;
    border-top-color:transparent;
    border-width: 4px;
    border-radius:50%;
    -webkit-animation: spin .8s linear infinite;
    animation: spin .8s linear infinite;
}
</style>
<script>
  \$(document).ready(function () {
    \$("#Submit").click(function(event) {
       Execute();
      \$('#cover-spin').show();
    });

    function Execute(){
      \$.ajax({
        type: 'POST',
        url: 'delete.pl',
        data: { 'dbid': \$("input[name='dbid']").val()
        },
   
         success: function(res) {
          \$('#cover-spin').hide();
    \$('#result').text(res.msg);
  },
        error: function() {
          alert("failed");
        }
      });
    };

  });
</script>
</head>

<body>
<p>content </p>
<p>====================================================== <br />
  |<br />
  |content<br />
  |<br />
  -------------------------------------------------------<br />
  <br />
  after submit relond only content in this div (box)  <br />
</p>
<div> <! –– relond only this part of div ––>
<div id="cover-spin"></div>
<p>&nbsp;</p>
  [% FOREACH name IN list %]
  <p>Name:  
  [% name.1 %]
  </p>
   <input type="hidden"  name="dbid" value="[% name.0%]">
   <button  type="submit" id="Submit" name="delete" value="delete">Del
+ete user</button>
   <p id="result"></p>
  [% END %]
</div> <! –– div ends here ––>
<p><br />
  ---------------------------------------------------------<br />
  |<br />
  | content <br />
  |<br />
  ====================================================== </p>
<p>content</p>
</body>
</html>

START_HTML

$html->process (\$temp_html, { list => $names})
        or die $html->error;

[download]

delete.pl

#!/usr/bin/perl -w

use CGI;
use DBI;
use JSON;
use CGI qw(:standard);

my $cgi = CGI->new();


my $host =   "sql2.freemysqlhosting.net";
my $usr =    "sql12345678";
my $pwd =    "**********";
my $dbname = "sql12345678";

my $dbh = DBI->connect("DBI:mysql:$dbname:$host", $usr, $pwd, {
                                  AutoCommit => 0,
                                  RaiseError => 1, 
                                  }) or die $DBI::errstr;
                                  
                                
                                  
$db_id = $cgi->param("dbid");

if (param('delete') eq 'delete') { 
my $delete = $dbh->prepare("delete from names where id =?");
$delete->execute($db_id);
$delete->finish();

$success = "user deleted";

my $json = encode_json(
  { msg => $success }
);
print $cgi->header( -type => 'application/json' ),$json;
}

$dbh->commit;
$dbh->disconnect;

[download]

In reply to json no reload by bigup401

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.