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<h1>GoJS Change Log</h1>
<p id="ver"></p>

<p>
  We maintain a <a href="https://github.com/NorthwoodsSoftware/GoJS" target="_blank" rel="noopener">GitHub
    Repository</a>, which
  you can star to follow version updates. We also notify of changes on
  <a href="https://twitter.com/NorthwoodsGo" target="_blank" rel="noopener">Twitter</a>.
</p>


<h2 id="3.0">GoJS 3.0</h2>

<p>GoJS 3.0 brings a number of new features for advanced Diagram control, such as custom routing via
  <a target="_blank" href="intro/routers.html">Routers</a> and data-bound theming
  with <a target="_blank" href="intro/theming.html">Themes</a>. We have also rewritten some of the internals
  to take advantage of modern JavaScript, and rewritten the API to use clearer enumerations. These changes are largely
  backwards-compatible.
</p>

<p>There are a number of other changes, <a href="#3.0">detailed below.</a></p>

<h3 id="3.0.21">Changes for 3.0.21</h3>
<ul>
  <li>Simplified some minified names for simpler debugging.</li>
  <li>Licensing fixes on some systems.</li>
</ul>

<h3 id="3.0.20">Changes for 3.0.20</h3>
<ul>
  <li>Fixed <a>Diagram.allowDragOut</a> causing a Diagram's <a>Diagram.documentBounds</a> to fluctuate while dragging Parts out of the Diagram.</li>
  <li>Fixed an unusual initialization exception involving Links with AvoidsNodes routing and collapsed Groups.</li>
</ul>

<h3 id="3.0.19">Changes for 3.0.19</h3>
<ul>
  <li>Fixed the <a>Brush</a> constructor when the first argument is an initialization object, rather than a <a>BrushType</a>.</li>
</ul>

<h3 id="3.0.19">Changes for 3.0.19</h3>
<ul>
  <li>Fixed <a>Diagram.zoomToFit</a> or <a>CommandHandler.zoomToFit</a> failing to account for any <a>Diagram.scrollMargin</a>.</li>
  <li>Fixed the undoing/redoing of removing a label node key from a link data's label keys Array.</li>
  <li>Fixed the <a>Overview.box</a> not updating on large observed Diagram scrolls.</li>
</ul>

<h3 id="3.0.18">Changes for 3.0.18</h3>
<ul>
  <li>Fixed an internal problem introduced in 3.0.17 with Bindings evaluated when there's no Diagram.</li>
</ul>

<h3 id="3.0.17">Changes for 3.0.17</h3>
<ul>
  <li>Fixed some <a>TextBlock</a> properties not updating when using the SVG renderer.</li>
  <li>Fixed <a>DraggingTool</a> not updating completely when modifier keys change without a mouse/pointer movement.</li>
  <li>Fixed pointerMove events when dragging between <a>Diagram</a>s separated by a shadow DOM</li>
  <li>Fixed the measuring of some multiple lines when <a>TextBlock.maxLines</a> is used</li>
</ul>

<h3 id="3.0.16">Changes for 3.0.16</h3>
<ul>
  <li>
    Enabled modifying the <a>Part.layerName</a> of the <a>DraggingTool.draggedParts</a> during a drag.
  </li>
  <li>
    Fixed control-drag-copying of subtrees when using a <a>TreeModel</a> and when <a>CommandHandler.copiesParentKey</a> is true,
    to make sure the copied subtree roots have the same parents as what was copied.
  </li>
  <li>
    Fixed Node position values in the <a>UndoManager</a> when stopping an ongoing animation that modifies Node positions.
  </li>
</ul>

<h3 id="3.0.15">Changes for 3.0.15</h3>
<ul>
  <li>
    Fixed SVG rendering context when updating <a>TextBlock.stroke</a>
  </li>
</ul>

<h3 id="3.0.14">Changes for 3.0.14</h3>
<ul>
  <li>
    Fixed Table Panel layout when some previously-visible elements were set to invisible.
  </li>
  <li>
    Added keyboard command bindings: Ctrl-Shift-Z for <a>CommandHandler.redo</a>, and
    Shift-F10 or Ctrl-Shift-\ (backslash) for <a>CommandHandler.showContextMenu</a>.
    (Use Command key instead of Ctrl on a Mac.)
  </li>
  <li>
    Fixed colors of Buttons whose actions change the button's <a>Panel.isEnabled</a> property.
  </li>
  <li>
    Added support for bindings on the <a>RelinkingTool.fromHandleArchetype</a>, <a>RelinkingTool.toHandleArchetype</a>,
    and <a>RotatingTool.handleArchetype</a>.
  </li>
  <li>
    Fixed the signature of <a>Router.routeLinks</a> because the second argument is never undefined.
  </li>
  <li>
    Fixed clipping regions when using the SVG rendering context.
  </li>
</ul>

<h3 id="3.0.13">Changes for 3.0.13</h3>
<ul>
  <li>
    Fixed SVG rendering context not updating the undocumented <code>GraphObject.filter</code> property.
  </li>
  <li>
    Fixed SVG rendering context not updating (removing) Nodes when they became zero-sized.
  </li>
  <li>
    Fixed SVG rendering context drawing Parts with non-real <a>Part.location</a>s.
  </li>
  <li>
    Fixed grid updating when toggling <a>Diagram.grid</a> values.
  </li>
  <li>
    Fixed a case where Diagram and Layer <code>findObject...</code> methods would only partially update a Part's location or position.
  </li>
  <li>
    Added a work-around for improper minification by Terser so that calls to <code>toString</code>
    on instances of GoJS classes produce the expected output.
  </li>
</ul>

<h3 id="3.0.12">Changes for 3.0.12</h3>
<ul>
  <li>
    <a>TreeModel.setDataProperty</a> now calls <a>TreeModel.setParentLinkCategoryForNodeData</a> when the property name
    matches the <a>TreeModel.parentLinkCategoryProperty</a>.
  </li>
  <li>
    Improved the default values for <a>Shape.spot1</a> and <a>Shape.spot2</a> for the "Capsule" figure.
  </li>
  <li>
    Fixed clipping regions in rendered SVG when using Spot panels with <a>Panel.isClipping</a> set to true.
  </li>
  <li>
    Fixed the type signature for the <a>Brush</a> constructor.
  </li>
  <li>
    Setting <a>GraphObject.fromEndSegmentLength</a> or <a>GraphObject.toEndSegmentLength</a>
    when the port or link spot is a "...Side" Spot now automatically invalidates the routing of the link.
  </li>
  <li>
    Fixed Link JumpOver geometry after some animations.
  </li>
</ul>

<h3 id="3.0.11">Changes for 3.0.11</h3>
<ul>
  <li>
    TextBlocks inside "Graduated" Panels are no longer drawn as tiny lines when the scale is very small.
  </li>
  <li>
    Fixed SVG rendering for some multi-line text.
  </li>
  <li>
    Fixed incorrect <a>Diagram.position</a> setting when panning with some animations.
  </li>
</ul>


<h3 id="3.0.10">Changes for 3.0.10</h3>
<ul>
  <li>
    Fixed a regression from 3.0.5: the built-in AvoidsNodes <a>Router</a> was not calling the base method <a>Router.canRoute</a>.
  </li>
  <li>
    Unnecessary "Change not within a transaction" fix for images loading during animations.
  </li>
  <li>
    Fixed some animations that were erratically changing the Diagram position when a <a>Diagram.contentAlignment</a> is set.
  </li>
  <li>
    The AvoidsNodes router no longer routes during the default animation, and preserves AvoidsNodes routes during animation.
  </li>
</ul>


<h3 id="3.0.9">Changes for 3.0.9</h3>
<ul>
  <li>
    Fixed updating Bindings in Adornments when data in itemArrays change.
  </li>
</ul>

<h3 id="3.0.8">Changes for 3.0.8</h3>
<ul>
  <li>
    <a>LinkingBaseTool.isValidCycle</a>, when using a <a>TreeModel</a>, now correctly assumes that
    <a>Diagram.validCycle</a> is either <a>CycleMode.DestinationTree</a> or <a>CycleMode.SourceTree</a>,
    depending on the value of <a>Diagram.isTreePathToChildren</a>.
  </li>
  <li>
    Fixed setting the visibility of <a>Diagram.grid</a> in certain circumstances when initializing a Diagram.
  </li>
  <li>
    Fixed confusion with <a>InputEvent</a>s when calling <a>CommandHandler.showContextMenu</a> during a
    <a>GraphObject.click</a> or <a>Diagram.click</a> event.
  </li>
</ul>

<h3 id="3.0.7">Changes for 3.0.7</h3>
<ul>
  <li>
    Added <a>InputEvent.commandKey</a>, which returns a normalized key string based on the <a>InputEvent.key</a> and <a>InputEvent.code</a>.
    This is convenient to use in <a>CommandHandler.doKeyDown</a> or <a>Tool.doKeyDown</a> and their overrides.
  </li>
  <li>
    Fixed keyboard shortcuts for QWERTZ-layout keyboards.
  </li>
</ul>

<h3 id="3.0.6">Changes for 3.0.6</h3>
<ul>
  <li>
    Added another work-around for Babel transpilation bug.
  </li>
  <li>
    Fixed the <a>Robot</a> extension to handle "Delete" key events.
  </li>
  <li>
    Fixed <a>GridLayout</a> when <a>GridLayout.alignment</a> is <code>Position</code> for Parts that have
    non-zero <a>GraphObject.margin</a> on the left or top sides.
    Fixed other built-in Layouts that use LayoutNetworks when Nodes have non-zero
    <a>GraphObject.margin</a> on the left or top sides.
  </li>
</ul>

<h3 id="3.0.5">Changes for 3.0.5</h3>
<ul>
  <li>
    Added work-around for Babel transpilation bug.
  </li>
  <li>
    Fixed some cases of AvoidsNodes routing within Groups.
  </li>
  <li>
    Optimized the built-in AvoidsNodes <a>Router</a> to never start when there are no AvoidsNodes links.
  </li>
  <li>
    Fixed <a>ForceDirectedLayout</a> not moving nodes that are <a>ForceDirectedVertex.isFixed</a>.
  </li>
  <li>
    Fixed the updating of <a>Diagram.documentBounds</a> when dragging between diagrams.
  </li>
</ul>

<h3 id="3.0.4">Changes for 3.0.4</h3>
<ul>
  <li>
    Fixed keyboard shortcuts for AZERTY-layout keyboards.
  </li>
  <li>
    Added a convenience method overload for <a>GraphObject.trigger</a> that accepts parameters taken by the <a>AnimationTrigger</a> constructor.
  </li>
  <li>
    Fixed an error on animations of <a>GraphObject.desiredSize</a>.
  </li>
</ul>

<h3 id="3.0.3">Changes for 3.0.3</h3>
<ul>
  <li>
    Fixed some Group layouts failing to invalidate link routes.
  </li>
  <li>
    Efficiency improvements for AvoidsNodes Routing.
  </li>
</ul>

<h3 id="3.0.2">Changes for 3.0.2</h3>
<ul>
  <li>
    Fixed some interactions with mouse-over events during animations leading to incorrect Part positions.
  </li>
  <li>
    Fixed an issue where <a>Binding.ofModel</a> Bindings could cause problems with the clipboard.
  </li>
  <li>
    Removed erroneous <code>position: absolute</code> inline CSS from <a>Diagram.makeSVG</a> output elements.
  </li>
  <li>
    Fixed some <a>Adornment</a> locations when a <a>Part.locationObjectName</a> is set and there is no <a>Adornment.placeholder</a>.
  </li>
  <li>
    <a href="samples/LinkLabelRouter.html">LinkLabelRouter</a> will no longer unnecessarily move labels after an initial run.
  </li>
</ul>

<h3 id="3.0.1">Changes for 3.0.1</h3>
<ul>
  <li>
    <strong>Potentially incompatible:</strong>
    We have added <a>InputEvent.code</a> to correspond to <code>KeyboardEvent.code</code>
    <a>CommandHandler.doKeyDown</a> now uses <code>KeyboardEvent.code</code> instead of <code>KeyboardEvent.key</code> for better cross-language shortcut support.
    This may lead to incompatibilities if you have code (such as testing code) that sets an <a>InputEvent.key</a> value. You may need to additionally set <a>InputEvent.code</a>.
    If your code does not modify the value of <a>InputEvent.key</a> anywhere (such as in a tool customization or in a <a>CommandHandler.doKeyDown</a> override),
    you do not need to do anything.
  </li>
  <li>
    Fixed some initial positions when <a>Diagram.autoScale</a> scales initial contents, but a scrollbar is still required.
  </li>
  <li>
    Fixed some <a>Iterator</a>s returned by GoJS (such as from <a>Node.findLinksInto</a>) returning faulty values when
    using <code>Symbol.iterator</code>.
  </li>
  <li>
    Fixed a bug where large nodes in a <a>ForceDirectedLayout</a> would sometimes overlap unnecessarily.
  </li>
</ul>

<h2 id="3.0">Changes for 3.0</h2>

<h3 id="npmpackages">New npm packages</h3>
<p>For 3.0, the <code>gojs</code> npm package contains only the release libraries, and no extensions, documentation or
  sample code.
  The documentation, sample, and extensions code can be downloaded separately, via <code>npm create gojs-kit@latest</code>,
  or from our <a href="https://github.com/NorthwoodsSoftware/GoJS">GitHub repository</a>,
  or from our <a href="download.html">web site</a>.
</p>


<h3 id="Performance">Performance</h3>
<p>GoJS 3.0 leverages modern JavaScript and more modern Canvas API features for increased performance.
  However, this also means dropping support for old browsers such as IE11,
  and there are a number of minor incompatibilities detailed below.</p>

<p>Diagram rendering is now generally faster, and Diagram heap size has been significantly reduced, especially for large
  graphs.
</p>


<h3 id="Routers">Routers</h3>
<div class="flex flex-row">
  <div class="flex flex-col items-center">

    <img class="h-80" src="assets/images/fp/changelog/3.0avoidsLinks.gif">
    <p><a href="samples/AvoidsLinksRouter.html"><span class="text-xs italic">AvoidsLinks Router</span></a></p>
  </div>
  <div class="flex-1">
    <p>
      One has always been able to customize the computed paths for Links by setting properties
      on a Link or on its connected port elements, or by overriding methods on a custom Link subclass.
      There is now support for a separate routing phase where instances of <a>Router</a> can modify Links.
      See the <a href="intro/routers.html">intro page on routers</a> for more information.
    </p>
    <p>
      GoJS 3.0 introduces the <a href="samples/AvoidsLinksRouter.html">AvoidsLinks Router</a>, which attempts to
      separate parallel link segments, and can work alongside AvoidsNodes routing.
    </p>
  </div>
</div>

<h3 id="Theming">Theming</h3>
<p>
  GoJS now provides functionality to define and manage themes, and GraphObjects can now be themed via theme bindings.
  This allows for applications to more easily provide multiple themes, especially light and dark mode.
  See the <a href="intro/theming.html">intro page in theming</a> for more information.
</p>


<h3 id="ViewportLayers">Viewport Layers</h3>
<p>
  There are two new default layers in each Diagram, <code>"ViewportBackground"</code> and
  <code>"ViewportForeground"</code>.
  These layers have the new property <a>Layer.isViewportAligned</a> set to <code>true</code>.
  Parts in viewport aligned layers will not obey the <a>Diagram.position</a> or <a>Diagram.scale</a> properties,
  so as the user scrolls or pans or zooms they will remain fixed in the viewport.
</p>
<p>
  Layers with <a>Layer.isViewportAligned</a> set to <code>true</code> will automatically position and scale their Parts
  to be relative to the viewport, based on the Part's <a>GraphObject.alignment</a> and <a>GraphObject.alignmentFocus</a>
  values,
  not on its <a>Part.location</a> or <a>GraphObject.position</a>.
</p>


<h3 id="Enumerations">Enumerations</h3>
<p>
  GoJS now uses Typescript enumerations to represent possible values for many properties.
  This enables autocompletion in some text editors.
  Some examples:
</p>
<ul>
  <li>
    Where one wrote:
    <code>new go.Panel({ stretch: go.GraphObject.Fill })</code>,
    <br>one can now write:
    <code>new go.Panel({ stretch: go.Stretch.Fill })</code>.
  </li>
  <li>
    Where one wrote:
    <code>new go.RowColumnDefinition({ column: 1, sizing: go.RowColumnDefinition.None })</code>,
    <br>one can now write:
    <code>new go.RowColumnDefinition({ column: 1, sizing: go.Sizing.None })</code>.
  </li>
  <li>
    Where one wrote:
    <code>new go.TreeLayout({ alignment: go.TreeLayout.AlignmentStart })</code>,
    <br>one can now write:
    <code>new go.TreeLayout({ alignment: go.TreeAlignment.Start })</code>.
  </li>
</ul>
<p>
  The original static EnumValue properties have been deprecated in favor of these new enumerations,
  but continue to exist for compatibility. So, for example:
  <code>go.GraphObject.Fill === go.Stretch.Fill</code>.
  The never-documented <b>EnumValue</b> class has been removed from the library.
  The new enum values are numbers.
</p>


<h3 id="OtherNewFeatures">Other New Features</h3>
<ul>
  <li>
    Improved Rounded Rectangles: The commonly used <code>"RoundedRectangle"</code> <a>Shape.figure</a>
    now considers the <a>Shape.parameter2</a> option to be a bit flag mask that determines which corners to round.
    1: top-left, 2: top-right, 4: bottom-right, 8: bottom-left.
    This makes it easier to round only the bottom or top corners, or a single corner.
    For compatibility, the default flags value rounds all four corners.
  </li>
  <li>
    Added the predefined <code>"Capsule"</code> figure, as yet another kind of rounded rectangle.
    See the <a href="./samples/shapes.html">Shapes sample</a> for an example.
  </li>
  <li>
    Added the predefined <code>"Borders"</code> figure, as yet another kind of rectangle where
    the <a>Shape.parameter1</a> option is a bit flag mask that determines which sides are drawn.
    1: top, 2: right, 4: bottom, 8: left.
    See the <a href="./samples/shapes.html">Shapes sample</a> for an example.
  </li>
  <li>
    Added methods <a>GraphObject.bindModel</a>, <a>GraphObject.bindObject</a>, and <a>GraphObject.bindTwoWay</a>,
    as convenience functions for adding a Binding to a GraphObject,
    which additionally call <a>Binding.ofModel</a>, <a>Binding.ofObject</a>, and <a>Binding.makeTwoWay</a>,
    respectively.
    The fourth argument to <a>GraphObject.bind</a> has been deprecated -- if you want a TwoWay Binding,
    call <a>GraphObject.bindTwoWay</a>, which is a clearer declaration of intent.
  </li>
  <li>
    The <a>ForceDirectedLayout</a> class has been rewritten, although the API remains compatible.
    For small to medium-sized simple graphs (up to around 1000 nodes), these changes should not be noticeable,
    however for large or complex graphs node placements should be better.
    Several properties have been added to <a>ForceDirectedLayout</a> -- look for names with "prelayout" in them.
  </li>
  <li>
    <a>LayeredDigraphLayout</a> has improved the routing of some links that go "backward" to form a cycle.
  </li>
  <li>
    Added static functions <a>Point.stringifyFixed</a>, <a>Size.stringifyFixed</a>, <a>Rect.stringifyFixed</a>,
    <a>Margin.stringifyFixed</a>, <a>Spot.stringifyFixed</a>, and <a>Geometry.stringifyFixed</a>
    to produce <a>Binding.backConverter</a>s
    that reduce the size of the output JSON and to make it easier to read and compare.
    Added the property <a>Model.pointsDigits</a> to control how many decimal digits are written for the
    <a>Link.points</a> list by <a>Model.toJson</a>.
  </li>
  <li>
    Added the static function <a>TextBlock.isValidFont</a> to allow dynamically deciding
    whether a CSS font string is valid or not.
    This is like the existing <a>Brush.isValidColor</a> for checking CSS color strings.
  </li>
  <li>
    Added the read-only property <a>Node.isTreeRoot</a> as a quick way to decide whether a node is a "root" node,
    while ignoring links that are not <a>Link.isTreeLink</a>, ignoring reflexive links, and considering
    <a>Diagram.isTreePathToChildren</a>.
  </li>
  <li>
    Code that depends on a <a>Group.placeholder</a> or an <a>Adornment.placeholder</a>
    now also checks that the placeholder is <a>GraphObject.isVisibleObject</a>,
    to make it possible to dynamically control whether the placeholder determines the position and size of the Group or
    Adornment.
  </li>
  <li>
    Calls to <a>Model.toIncrementalJson</a> or <a>Model.toIncrementalData</a> no longer signal an error
    if the model is a <a>GraphLinksModel</a> and <a>GraphLinksModel.linkKeyProperty</a> is the empty string.
    Instead, it first modifies the model so that <a>GraphLinksModel.linkKeyProperty</a> is set to <code>"key"</code>,
    thereby assigning unique key values to all of the link data objects, before producing the resulting text or data.
  </li>
  <li>
    Added the property <a>LinkReshapingTool.resegmentingDistance</a>, to control the distance from a straight line that
    two adjacent nearly straight segments should be combined into a single segment.
  </li>
  <li>
    Group animations such as group expansion and adding members have been improved.
  </li>
</ul>


<h2 id="Changes">Changes and Incompatibilities</h2>

<h3 id="Diagraminherit">Diagram.inherit</h3>
<p>
  The <b>Diagram.inherit</b> static function has been removed from the API.
  Now the only supported way to define subclasses is to use <code>class ... extends ... { ... }</code>.
</p>
<p>
  However, this is still a JavaScript library, so it is still possible to dynamically override an
  individual method on an individual object just by assigning it to a <code>function(...) { ... }</code>.
  A number of samples continue to demonstrate this by assigning a method on a <a>Tool</a>
  or on the <a>CommandHandler</a> during <a>Diagram</a> initialization.
</p>


<h3 id="SetMapList">GoJS Set and Map and List</h3>
<p>The GoJS <a>Set</a> and <a>Map</a> and <a>List</a> collection classes,
  and their iterators, now implement the JavaScript <code>Symbol.iterator</code> static property.
  This means that they can be used with <code>for ... of</code> statements and spread syntax <code>[...x]</code>.
</p>
<pre><code class="language-js">  const s = new go.Set();
  s.add(1); s.add(2); s.add(3);

  for (let x of s.iterator) {
    console.log(x);
  }
  // prints:
  // 1
  // 2
  // 3

  [...s] // returns the array [1, 2, 3]
  [...s.iterator] // also returns the array [1, 2, 3]
</code></pre>

<p>
  However, for compatibility, iterators are otherwise unchanged, and <a>Set.iterator</a>, <a>Map.iterator</a>,
  and <a>List.iterator</a> return GoJS iterators, not the built-in JS iterators.
</p>
<p>
  GoJS <a>Set</a> and <a>Map</a> used to consider both a string and a number of the
  same value (e.g. "3.14159" and 3.14159) as the same key. They are now considered different keys.
  Be sure to always get with the same type of value that you added to the Set or set in the Map.
</p>
<p>
  GoJS <a>Set</a> and <a>Map</a> no longer warn about potential collection modification
  while iterating over the collection.
</p>


<h3 id="InputEventkey">InputEvent.key, InputEvent.code, and InputEvent.commandKey</h3>
<p>
  The value of <a>InputEvent.key</a> now exactly reflects the browser <code>KeyboardEvent.key</code> value.
  If your code does not use the value of <a>InputEvent.key</a> anywhere
  (such as in a tool customization or in a <a>CommandHandler.doKeyDown</a> override),
  you do not need to do anything.
  For some keys, these strings are slightly different. The differences are:
  <style>
    table {
      border: 1px solid black;
      border-collapse: collapse;
    }

    th {
      border: 1px solid black;
    }

    td {
      border: 1px solid black;
    }
  </style>
<table>
  <tr>
    <th>GoJS 2.3</th>
    <th>GoJS 3.0</th>
  </tr>
  <tr>
    <td>"Esc"</td>
    <td>"Escape"</td>
  </tr>
  <tr>
    <td>"Subtract"</td>
    <td>"-"</td>
  </tr>
  <tr>
    <td>"Add"</td>
    <td>"+"</td>
  </tr>
  <tr>
    <td>"Add"</td>
    <td>"="</td>
  </tr>
  <tr>
    <td>"Up"</td>
    <td>"ArrowUp"</td>
  </tr>
  <tr>
    <td>"Down"</td>
    <td>"ArrowDown"</td>
  </tr>
  <tr>
    <td>"Right"</td>
    <td>"ArrowRight"</td>
  </tr>
  <tr>
    <td>"Left"</td>
    <td>"ArrowLeft"</td>
  </tr>
  <tr>
    <td>"Del"</td>
    <td>"Delete"</td>
  </tr>
</table>
</p>
<p>
  GoJS 3.0 now reports the <a>InputEvent.key</a> faithfully as 'a' or 'A'.
  In GoJS 2.3 it uppercased each letter key.
  Note that GoJS treats both "+" and "=" (formerly "Add") as default commands to increase zoom.
</p>

<p>
  As of GoJS 3.0.7, GoJS uses <a>InputEvent.commandKey</a> to determine
  if any command shall be invoked by <a>CommandHandler.doKeyDown</a>.
  This readonly property considers the values of both <a>InputEvent.code</a> and <a>InputEvent.key</a>
  and normalizes the output to be consistent across keyboard languages.
  If you are overriding Tool or CommandHandler behavior, considering the value of
  <a>InputEvent.commandKey</a> rather than <a>InputEvent.code</a> or <a>InputEvent.key</a>
  will lead to more consistent behavior.
</p>

<h3 id="MinorIncompatibilities">Minor Incompatibilities</h3>
<ul>
  <li>
    <a>Diagram.initialDocumentSpot</a> and <a>Diagram.initialViewportSpot</a> have had their default value changed from
    <a>Spot.TopLeft</a> to <a>Spot.None</a>. As a consequence, when they are set to a non-None Spot,
    they will take precedence over any <a>Diagram.initialContentAlignment</a>.
  </li>
  <li>
    <code>go.licenseKey</code>, deprecated when 2.0 was released, has been removed.
    Set the static property <code>go.Diagram.licenseKey</code> instead.
  </li>
  <li>
    Some default templates have been updated to be themed by default.
    If you are using default templates in your diagram,
    you may need to make some minor adjustments to the default themes to better suit the look and feel of your app.
    Most notably, the default link template is themed such that links are white when using the default dark theme.
    If your diagram has a dark mode and uses the default link template, define your own link template or use
    the new theming functionality of v3.0.
  </li>
  <li>
    <code>"Button"</code> builders no longer have a "pressed" state.
    <code>"ContextMenuButton"</code>s now have more padding.
  </li>
  <li>
    <b>GraphObject.areaBackground</b>, formerly deprecated, has been removed.
    To get the old behavior, wrap a <a>Panel</a> around the GraphObject and set that Panel's
    <a>GraphObject.background</a> instead.
  </li>
  <li>
    The initial value of <a>Model.copiesKey</a> has changed from true to false.
    For example, this is useful to prevent nodes copied from a <a>Palette</a> to a <a>Diagram</a>
    to keep the same key in the target diagram's model that it had in the palette's model.
    To get the old behavior, set <code>copiesKey: true</code> on the model.
  </li>
  <li>
    The initial value of <a>CommandHandler.isZoomToFitRestoreEnabled</a> has changed from true to false.
    This removes the ability for repeated Shift-Z commands to restore the original diagram scale and position.
    But it means that repeated programmatic calls to <a>CommandHandler.zoomToFit</a> will actually zoom-to-fit.
    To get the old behavior, set <code>isZoomToFitRestoreEnabled: true</code> on the <a>CommandHandler</a>.
  </li>
  <li>
    The <a>LayeredDigraphLayout.alignOption</a> property now defaults to the value <a>LayeredDigraphAlign.All</a>.
    The new align code is usually better and faster than the old pack code, sometimes significantly faster.
    To get the old behavior, set <code>alignOption: go.LayeredDigraphAlign.None</code>.
  </li>
  <li>
    <a>Layout.getLayoutBounds</a> now respects each Part's <a>GraphObject.margin</a>, which makes it easier
    to pretend that nodes are smaller or bigger than they actually are.
    To get the old behavior, don't set <b>Node.margin</b> or set it to zero.
    <a>TableLayout</a> has been updated to maintain the original behavior because it has always
    treated <b>Node.margin</b> differently from all other layouts.
  </li>
  <li>
    Setting <a>Layer.isTemporary</a> to true no longer automatically sets <a>Layer.isInDocumentBounds</a> to false.
    If you have added new temporary Layers and you want Parts in those Layers not to be considered when computing the
    document bounds, you'll need to set that property to false explicitly.
  </li>
  <li>
    We have fixed the behavior of <a>CommandHandler.selectAll</a> not to select Parts/Nodes/Links that
    are not selectable.
  </li>
  <li>
    Bundled <a>AnimationTrigger</a>s no longer use the <a>AnimationManager.defaultAnimation</a>.
    This means that <code>"Trigger"</code> is no longer a reason for <a>AnimationManager.canStart</a>.
    This allows bundled animations to run in parallel with default animations.
    Bundled animations will no longer raise the <code>"AnimationStarting"</code> or
    <code>"AnimationFinished"</code> <a>DiagramEvent</a>s.
  </li>
  <li>
    <a>Binding.isToModel</a> is no longer settable. Instead, one should call <a>Binding.ofModel</a>.
  </li>
  <li>
    <a>LayeredDigraphLayout</a> no longer spreads overlapping link segments apart by default.
    If you want to regain that functionality, add an <a>AvoidsLinksRouter</a> to your <a>Diagram.routers</a> List.
  </li>
</ul>

<h3 id="Fixes">Fixes</h3>
<ul>
  <li>Moving a collection of Parts no longer invalidates the Link routes in the collection.</li>
  <li>Scrollbars no longer flicker on completion of initial animation.</li>
  <li>Reduced possible duplicate LayoutCompleted events in diagrams with multiple Group layouts.</li>
</ul>

<h3 id="ExtensionsSamples">Changes to Extensions and Samples</h3>
<p>
  All extensions and samples are now in the <code>create-gojs-kit</code> npm package rather than in the
  <code>gojs</code> package.
  We suggest that you download them by executing <code>npm create gojs-kit@latest</code>.
  However you can continue to download everything from the GoJS
  <a href="https://github.com/NorthwoodsSoftware/GoJS">GitHub repository</a>
  or from our <a href="download.html">web site</a>.
</p>
<p>
  Direct script references to extensions in the <code>gojs</code> package will no longer work because that package no
  longer
  contains any extensions. However it is possible to refer to them in the <code>create-gojs-kit</code> package:
</p>
<pre><code class="language-js">&lt;script src="https://cdn.jsdelivr.net/npm/create-gojs-kit/dist/extensions/AvoidsLinksRouter.js"&gt;&lt;/script&gt;
</code></pre>
<p>
  There is now an <a>AvoidsLinksRouter</a> extension that helps reduce overlapping orthogonal link segments
  for links that are unrelated to each other.
  It is demonstrated in the <a href="./samples/AvoidsLinksRouter.html">AvoidsLinksRouter sample</a>.
</p>
<p>
  There is now an <a>LinkLabelRouter</a> extension.
  It is demonstrated in the <a href="./samples/LinkLabelRouter.html">LinkLabelRouter sample</a>.
</p>
<p>
  There is now an <a>AriaCommandHandler</a> extension.
  We have added an <a href="./samples/Accessibility.html">Accessibility extension sample</a> to demonstrate
  accessibility in GoJS.
</p>
<p>
  The <a href="./extensions/Themes.js">Themes.js</a> extension offers some suggested theming choices.
</p>
<p>
  We have added the <code>"ChamferedRectangle"</code> figure to the <a href="./extensions/Figures.js">Figures.js</a>
  file,
  which is just like <code>"RoundedRectangle"</code>, except the corners are cut off straight at 45 degrees
  no matter the aspect ratio of the shape.
  <a>Shape.parameter1</a> controls the length of both sides of the cut-off triangle.
  <a>Shape.parameter2</a> controls which corners are cut off.
  1: top-left, 2: top-right, 4: bottom-right, 8: bottom-left.
</p>
<p>
  The extensions <a href="./extensions/Figures.js">Figures.js</a> file no longer redefines the built-in figures.
</p>
<p>
  We have added new samples:
</p>
<ul>
  <li><a href="./samples/warehouse.html">Warehouse</a></li>
  <li><a href="./samples/industrialDiagram.html">Industrial Diagram</a></li>
</ul>

<p>
  We have deleted the <code>extensionsTS</code> subdirectory.
  The <code>extensionsJSM</code> subdirectory includes .TS TypeScript files for all of the extensions,
  along with the compiled .JS JavaScript files that can be loaded as ECMAScript modules.
</p>
<p>
  The JavaScript files in the <code>extensions</code> subdirectory are now all
  generated from the compiled TypeScript files in <code>extensionsJSM</code>,
  which reduces the potential variation in functionality between the two extensions directories.
</p>
<p>
  The sample HTML pages in both <code>extensions</code> and <code>extensionsJSM</code>
  have been moved to the <code>samples</code> subdirectory, thereby removing duplicate samples.
</p>
<p>
  A few samples have been moved from the <code>projects</code> subdirectory into the <code>samples</code> subdirectory.
  The <code>projects</code> subdirectory has been deleted.
</p>
<p>
  We have deleted the <code>RoundedRectangles.js</code> file from the extensions and extensionsJSM directories.
  The figures that had been defined there are now predefined in the GoJS library.
</p>
<p>
  We have deleted the Storage extensions. If you need them, copy the code from version 2.
</p>

<hr />


<h3 id="OldChangeLogs">Old Change Logs</h3>
<h4><a href="../2.3.17/changelog.html">Change log for 2.3</a></h4>
<h4><a href="../2.2.23/changelog.html">Change log for 2.2</a></h4>
<h4><a href="../2.1.56/changelog.html">Change log for 2.1</a></h4>
<h4><a href="../2.0.21/changelog.html">Change log for 2.0</a></h4>
<h4><a href="../1.8.38/changelog.html">Change log for 1.*</a> (unsupported)</h4>

        
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