jQuery: Filter notes on search input

by Peter Jang

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Notes</title>
  <link rel="stylesheet" href="css/notes.css"></link>
  <script
    src="https://code.jquery.com/jquery-3.2.1.js"
    integrity="sha256-DZAnKJ/6XZ9si04Hgrsxu/8s717jcIzLy3oi35EouyE="
    crossorigin="anonymous"></script>
  <script src="js/notes.js" defer></script>
</head>
<body>
  <div id="app">
    <div class="toolbar">
      <button class="toolbar-button toolbar-button-new">New</button>
      <button class="toolbar-button toolbar-button-delete">Delete</button>
      <input class="toolbar-search" type="text" placeholder="Search...">
    </div>
    <div class="note-container">
      <div class="note-selectors">
      </div>
      <div class="note-editor">
        <p class="note-editor-info">Timestamp here...</p>
        <textarea class="note-editor-input">
          First note...
          
          Note text here...
        </textarea>
      </div>
    </div>
  </div>
</body>
</html>

CSS

/* RESET */
* {
  margin: 0;
  padding: 0;
  border: 0;
  outline: none;
  box-sizing: border-box;
}

/* LAYOUT */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.toolbar {
  padding: 0.5em;
}
.toolbar-button, .toolbar-search {
  padding: inherit;
  border-radius: 0.3em;
}
.toolbar-search {
  float: right;
}
.note-container {
  display: flex;
  flex: 1;
}
.note-selectors {
  flex: 0 0 13em;
}
.note-selector {
  padding: 1em;
}
.note-selector p {
  margin: 0;
}
.note-editor {
  display: flex;
  flex: 1;
  flex-direction: column;
}
.note-editor-info {
  padding: 0.5em;
  text-align: center;
}
.note-editor-input {
  display: flex;
  flex: 1;
  width: 100%;
  padding: 0 2em 0 2em;
}

/* COLORS */
* {
  color: #454545;
  background-color: #FAFAF8;
}
.toolbar {
  background-color: #DCDADC;
}
.toolbar-button {
  background-color: #FFFFFF;
}
.toolbar-button:active {
  background-color: #AAAAAA;
}
.note-selectors {
  border-right: 1px solid #DCDADC;
}
.note-selector {
  border-bottom: 1px solid #DCDADC;
}
.note-selector.active {
  background-color: #FCE18D;
}
.note-selector-title {
  background-color: inherit;
}
.note-selector-timestamp {
  color: #626262;
  background-color: inherit;
}
.note-editor-info {
  color: #DCDADC;
}

/* TYPOGRAPHY */
body {
  font-family: sans-serif;
}
.note-selector-title {
  font-weight: bold;
}
.note-selector-timestamp {
  font-size: 0.7em;
}
.note-editor, .note-editor-input {
  font-size: 0.9em;
}

JavaScript

function transformNotes(notes) {
  return notes.slice().sort(function(a, b) {
    return b.timestamp - a.timestamp;
  });
}

function formatTitle(body) {
  var maxLength = 20;
  if (body.length > maxLength) {
    return body.substring(0, maxLength - 3) + '...';
  } else if (body.length === 0) {
    return "New note";
  } else {
    return body;
  }
}

function formatTimestamp(timestamp) {
  return new Date(timestamp).toUTCString();
}

function domCreateNoteSelector(note, selectedNote) {
  var $noteSelector = $(
    '<div class="note-selector' + (note === selectedNote ? ' active' : '') + '">' +
      '<p class="note-selector-title">' + formatTitle(note.body) + '</p>' +
      '<p class="note-selector-timestamp">' + formatTimestamp(note.timestamp) + '</p>' +
    '</div>'
  );
  $noteSelector.data(note);
  return $noteSelector;
}

function domCreateNoteSelectors(notes, selectedNote) {
  transformNotes(notes).forEach(function(note) {
    var $noteSelector = domCreateNoteSelector(note, selectedNote);
    $noteSelector.data(note);
    $('.note-selectors').append($noteSelector);
  });
}

function domUpdateNoteEditor(selectedNote) {
  $('.note-editor-info').html(formatTimestamp(selectedNote.timestamp));
  $('.note-editor-input').val(selectedNote.body);
}

function domSelectDefaultChild() {
  var children = $('.note-selector:visible');
  if (children.length > 0) {
    var $noteSelector = $(children[0]);
    if ($('.note-selector.active').length === 0) {
      $noteSelector.addClass('active');
      domUpdateNoteEditor($noteSelector.data());
    }
  } else {
    $('.note-editor').hide();
  }
}

$('.note-selectors').on('click', '.note-selector', function() {
  $('.note-selector').removeClass('active');
  $(this).addClass('active');
  domUpdateNoteEditor($(this).data());
});

$('.note-editor-input').on('input propertychange', function(event) {
  // Update the note data
  var body = $(this).val();
  var timestamp = Date.now();
  $('.note-selector.active').data('body', body);
 ...