JSFiddle - React, Tailwind, and code Playground
by abhiklpm
HTML
<input id="asignatura" type="text">
<input id="id_usuario" type="text">
<input id="id_alumno" type="text">
<span id="agregar">agregar (Click me)</span><br><br>
<div >
<table id="tabla">
<tbody>
</tbody>
</table>
</div><br><br>
<span id="newlink"></span>
JavaScript
var asign=$('#asignatura').val();
var id_user=$('#id_usuario').val();
var id_pupil=$('#id_alumno').val();
var calification;
$("#agregar").on('click', function(){
$('#tabla > tbody:last').after("<tr><td><input type='text' id='calification' name='calification' value=''>Input box added</td><td></td><td><a href='' id='link'>I dont have any link now !! type in the input box </a>agregar</td></tr>");
});
$('#calification').live('keyup', function(){
calification = $(this).val(); //alert(calification)
var newHref = "actualizar_notas.php?calificacion="+calification+"&&asignatura="+asign+" && id_usuario="+id_user+" && id_alumno="+id_pupil+"";
$('#link').attr('href', newHref).text('I have a link now ');
$('#newlink').text(newHref);
});