Using Modal Pop up but it automatically refreshes page

Question

I used the following technique to create a Modal Pop up on my SharePoint Page: https://jqueryui.com/dialog/#modal-form

It works create but when the Modal dialog screen appears, it refreshes on its own with out user input. By taking a look on the code, (I'm new so It could be staring me right in the phase), but I just don't see it.

I input everything in a CEWP but I received an error stating "Forms" and scripts are not alowed. So I just took the script and form portion and embedded it. But the Modal dialog still showed...it just refreshes by itself.

Here is the code from that page:

  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <style>
    label, input { display:block; }
    input.text { margin-bottom:12px; width:95%; padding: .4em; }
    fieldset { padding:0; border:0; margin-top:25px; }
    h1 { font-size: 1.2em; margin: .6em 0; }
    div#users-contain { width: 350px; margin: 20px 0; }
    div#users-contain table { margin: 1em 0; border-collapse: collapse; width: 100%; }
    div#users-contain table td, div#users-contain table th { border: 1px solid #eee; padding: .6em 10px; text-align: left; }
    .ui-dialog .ui-state-error { padding: .3em; }
    .validateTips { border: 1px solid transparent; padding: 0.3em; }
  </style>
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
  <script>
  $( function() {
    var dialog, form,

      // From http://www.whatwg.org/specs/web-apps/current-work/multipage/states-of-the-type-attribute.html#e-mail-state-%28type=email%29
      emailRegex = /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/,
      name = $( "#name" ),
      email = $( "#email" ),
      password = $( "#password" ),
      allFields = $( [] ).add( name ).add( email ).add( password ),
      tips = $( ".validateTips" );

    function updateTips( t ) {
      tips
        .text( t )
        .addClass( "ui-state-highlight" );
      setTimeout(function() {
        tips.removeClass( "ui-state-highlight", 1500 );
      }, 500 );
    }

    function checkLength( o, n, min, max ) {
      if ( o.val().length > max || o.val().length < min ) {
        o.addClass( "ui-state-error" );
        updateTips( "Length of " + n + " must be between " +
          min + " and " + max + "." );
        return false;
      } else {
        return true;
      }
    }

    function checkRegexp( o, regexp, n ) {
      if ( !( regexp.test( o.val() ) ) ) {
        o.addClass( "ui-state-error" );
        updateTips( n );
        return false;
      } else {
        return true;
      }
    }

    function addUser() {
      var valid = true;
      allFields.removeClass( "ui-state-error" );

      valid = valid && checkLength( name, "username", 3, 16 );
      valid = valid && checkLength( email, "email", 6, 80 );
      valid = valid && checkLength( password, "password", 5, 16 );

      valid = valid && checkRegexp( name, /^[a-z]([0-9a-z_\s])+$/i, "Username may consist of a-z, 0-9, underscores, spaces and must begin with a letter." );
      valid = valid && checkRegexp( email, emailRegex, "eg. ui@jquery.com" );
      valid = valid && checkRegexp( password, /^([0-9a-zA-Z])+$/, "Password field only allow : a-z 0-9" );

      if ( valid ) {
        $( "#users tbody" ).append( "<tr>" +
          "<td>" + name.val() + "</td>" +
          "<td>" + email.val() + "</td>" +
          "<td>" + password.val() + "</td>" +
        "</tr>" );
        dialog.dialog( "close" );
      }
      return valid;
    }

    dialog = $( "#dialog-form" ).dialog({
      autoOpen: false,
      height: 400,
      width: 350,
      modal: true,
      buttons: {
        "Create an account": addUser,
        Cancel: function() {
          dialog.dialog( "close" );
        }
      },
      close: function() {
        form[ 0 ].reset();
        allFields.removeClass( "ui-state-error" );
      }
    });

    form = dialog.find( "form" ).on( "submit", function( event ) {
      event.preventDefault();
      addUser();
    });

    $( "#create-user" ).button().on( "click", function() {
      dialog.dialog( "open" );
    });
  } );
  </script>
</head>
<body>

<div id="dialog-form" title="Create new user">
  <p class="validateTips">All form fields are required.</p>

  <form>
    <fieldset>
      <label for="name">Name</label>
      <input type="text" name="name" id="name" value="Jane Smith" class="text ui-widget-content ui-corner-all">
      <label for="email">Email</label>
      <input type="text" name="email" id="email" value="jane@smith.com" class="text ui-widget-content ui-corner-all">
      <label for="password">Password</label>
      <input type="password" name="password" id="password" value="xxxxxxx" class="text ui-widget-content ui-corner-all">

      <!-- Allow form submission with keyboard without duplicating the dialog button -->
      <input type="submit" tabindex="-1" style="position:absolute; top:-1000px">
    </fieldset>
  </form>
</div>


<div id="users-contain" class="ui-widget">
  <h1>Existing Users:</h1>
  <table id="users" class="ui-widget ui-widget-content">
    <thead>
      <tr class="ui-widget-header ">
        <th>Name</th>
        <th>Email</th>
        <th>Password</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>John Doe</td>
        <td>john.doe@example.com</td>
        <td>johndoe1</td>
      </tr>
    </tbody>
  </table>
</div>
<button id="create-user">Create new user</button>

Answer 1

Try using your HTML like below:

<button type="button" id="create-user"> Create New User </button>