Responsive & Fluid Drag-and-Drop Grid Layout with jQuery - gridstack.js

Gridstack.js is a vanilla JavaScript widget/grid layout plugin inspired by Gridster that allows you to dynamically and responsively rearrange grid items through drag and drop.

Note: The library now works as a Vanilla JavaScript plugin. You can also download the jQuery Version here for jQuery projects.

More features:

• Also supports touch events.
• Resizable grid items.
• Supports nested grid items.
• Compatible with Bootstrap 3/4 framework.
• No jQuery required (v2.0.0+)

View more:

• Best Grid Layout Plugins

Table Of Contents:

• Vanilla JS Doc
• jQuery Version Doc

Basic Usage (Vanilla JS Version):

1. Install & Download the package.

# Yarn
$ yarn add gridstack

# NPM
$ npm install gridstack --save

2. Include the necessary JavaScript and CSS files on the page.

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/gridstack.min.css" />
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/gridstack.all.js"></script>

3. Insert optional grid items to the Grid Stack container and pass the options via data-option attributes as follows:

<div class="grid-stack">
  <div class="grid-stack-item">
    <div class="grid-stack-item-content">Item 1</div>
  </div>
  <div class="grid-stack-item" data-gs-width="2">
    <div class="grid-stack-item-content">Item 2 wider</div>
  </div>
</div>

4. Initialize the plugin and done.

var grid = GridStack.init();

5. All default options.

var grid = GridStack.init({


    // accept widgets dragged from other grids or from outside
    // true (uses '.grid-stack-item' class filter) or false
    // string for explicit class name
    // function (i: number, element: Element): boolean
    acceptWidgets: false,

    // turns animation on
    animate: false,

    // amount of columns and rows
    column: 12,
    row: 0,

    // max/min number of rows
    maxRow: 0,
    minRow: 0,

    // widget class
    itemClass: 'grid-stack-item',

    // class for placeholder
    placeholderClass: 'grid-stack-placeholder',

    // text for placeholder
    placeholderText: '',

    // draggable handle selector
    handle: '.grid-stack-item-content',

    // class for handle
    handleClass: null,

    // allow for selecting older behavior (adding STYLE element to HEAD element instead of parentNode)
    styleInHead: false,

    // one cell height
    cellHeight: 60,
    cellHeightUnit: 'px',

    // margin
    margin: 10,
    marginUnit: 'px',

    // or
    marginTop: 10,
    marginBottom: 10,
    marginLeft: 10,
    marginRight: 10

    // if false it tells to do not initialize existing items
    auto: true,
    
    // minimal width.
    minWidth: 768,

    // class set on grid when in one column mode
    oneColumnModeClass: 'grid-stack-one-column-mode',

    // set to true if you want oneColumnMode to use the DOM order and ignore x,y from normal multi column layouts during sorting. This enables you to have custom 1 column layout that differ from the rest.
    oneColumnModeDomSort: false,

    // enable floating widgets
    float: false,

    // makes grid static
    staticGrid: false,

    // if true the resizing handles are shown even the user is not hovering over the widget
    alwaysShowResizeHandle: false,

    // allows to owerride jQuery UI draggable options
    draggable: {handle: '.grid-stack-item-content', scroll: true, appendTo: 'body'},

    // specify the class of items that can be dragged into the grid
    dragIn: false,
    dragInOptions : {
      revert: 'invalid',
      handle: '.grid-stack-item-content',
      scroll: false,
      appendTo: 'body'
    },

    // allows to owerride jQuery UI resizable options
    resizable: {autoHide: true, handles: 'se'},

    // disallows dragging of widgets
    disableDrag: false

    // disallows resizing of widgets
    disableResize: false,

    // if `true` turns grid to RTL. 
    // Possible values are `true`, `false`, `'auto'`
    rtl: 'auto',

    // if `true` widgets could be removed by dragging outside of the grid
    removable: false,
    removableOptions: {
      accept: 'grid-stack-item'
    },

    // time in milliseconds before widget is being removed while dragging outside of the grid
    removeTimeout: 2000,

    // CSS class when in one column mode
    disableOneColumnMode: 'grid-stack-one-column-mode',

    // class that implement drag'n'drop functionallity for gridstack
    ddPlugin: null
    
});

6. API methods.

// Creates a new widget.
grid.addWidget(el, {
  // options
  x, y, width, height, autoPosition, minWidth, maxWidth, minHeight, maxHeight, id, locked, noResize, noMove, resizeHandles
});

// create a grid and load children instead of init() + load()
grid.addGrid(parent, opts);

// call to setup dragging in from the outside (say toolbar), by specifying the class selection and options
grid.setupDragIn(dragIn, dragInOptions);

// Initailizes batch updates. 
// You will see no changes until commit method is called.
grid.batchUpdate();

// Relayout grid items to reclaim any empty space.
grid.compact();

// Gets current cell height.
grid.cellHeight();

// Update current cell height.
// grid.cell_height(grid.cell_width() * 1.2);
grid.cellHeight(val, noUpdate);

// Gets current cell width.
grid.cellWidth();

// Set/get the number of columns in the grid
// Require gridstack-extra.min.css
grid.column(column, doNotPropagate)

// Set the top/right/bottom/left margin between grid item and conten
grid.margin(value: numberOrString);

// Finishes batch updates. Updates DOM nodes. You must call it after batch_update.
grid.Commit();

// Set/get floating widgets
grid.float(val);

// Get current cell height
grid.getCellHeight();

// Disables / enables widgets moving/resizing.
grid.movable('.grid-stack-item', false);
grid.resizable('.grid-stack-item', true); 

// Get the position of the cell under a pixel on screen.
// position - the position of the pixel to resolve in absolute coordinates, as an object with top and leftproperties
// useOffset - if true, value will be based on offset vs position (Optional. Default false). Useful when grid is within position: relative element
// Returns an object with properties x and y i.e. the column and row in the grid.
grid.getCellFromPixel(position, useOffset);

// Return list of GridItem HTML dom elements (excluding temporary placeholder)
grid.getGridItems();

// Return current margin value.
grid.getMargin();

// Checks if specified area is empty.
grid.isAreaEmpty(x, y, width, height);

// Load the widgets from a list
grid.load(layout: GridStackWidget[], boolean | ((w: GridStackWidget, add: boolean) => void) = true)

// Locks/unlocks widget.
// el - widget to modify.
// val - if true widget will be locked.
grid.locked(el, val);

// Make new widgets after new items are appended to the grid.
grid.makeWidget(el);

// Set the minWidth/maxWidth for a widget.
grid.minWidth(el, val);
grid.maxWidth(el, val);

// Set the minHeight/maxWidth for a widget.
grid.minHeight(el, val);
grid.maxHeight(el, val);

// Removes widget from the grid.
// detachNode - if false node won't be removed from the DOM
grid.removeWidget(el, detachNode);

// Removes all widgets from the grid.
// detachNode - if false node won't be removed from the DOM
grid.removeAll(detachNode);

// Changes widget size
grid.resize(el, width, height);

// Changes widget position
grid.move(el, x, y);

// Enables/Disables resizing.
grid.resizable(el, val);

// Enables/Disables moving.
grid.movable(el, val);

// Updates widget position/size.
grid.update(el, x, y, width, height);

// Returns true if the height of the grid will be less the vertical constraint. Always returns true if grid doesn't have height constraint.
grid.willItFit(x, y, width, height, autoPosition);

// Toggle the grid animation state.
// doAnimate - if true the grid will animate.
grid.setAnimation(doAnimate);

// Modify number of columns in the grid
// doNotPropagate - if true existing widgets will not be updated.
// NOTE: Use column() instead in v1.0+
grid.setColumn(column, doNotPropagate);

// Update widget position/size.
grid.setStatic(staticValue);

// Toggle the grid static state
// staticValue - if true the grid becomes static.
grid.update(el, x, y, width, height));

// Destroy the instance
// detachGrid - if false nodes and grid will not be removed from the DOM
grid.destroy([detachGrid]);

// Enables/disables the plugin
grid.enable();
grid.disable();

// Enables/disables widget moving. includeNewWidgets will force new widgets to be draggable as per doEnable's value by changing the disableDrag grid option.
grid.enableMove(doEnable, includeNewWidgets);

// Enables/disables widget resizing. includeNewWidgets will force new widgets to be resizable as per doEnable's value by changing the disableResize grid option. 
grid.enableResize(doEnable, includeNewWidgets);

// Return the layout of the grid that can be serialized (list of item non default attributes, not just w,y,x,y but also min/max and id). 
grid.save(true/false);

7. Event handlers.

grid.on('added', function(event, items) {
  // after new items are added
});

grid.on('change', function(event, items) {
  // fired on change
});

grid.on('resize', function(event, el) {
  // fired on resize
});

grid.on('drag', function(event, el) {
  // fired on resize
});

grid.on('disable', function(event) {
  // var grid = event.target;
});

grid.on('dragstart', function(event, ui) {
  // var grid = this;
  // var element = event.target;
});

grid.on('dragstop',  function(event, ui) {
  // var grid = this;
  // var element = event.target;
});

grid.on('dropped',  function(event, previousWidget, newWidget) {
  // after dropped
});

grid.on('enable',  function(event) {
  // var grid = event.target;
});

grid.on('removed',  function(event, items) {
  // after removed
});

grid.on('resizestart',  function(event, el) {
  // var grid = this;
  // var element = event.target;
});

grid.on('resizestop',  function(event, items) {
  // on stop resizing
});

Basic Usage (jQuery Version):

1. Include jQuery library and other required resources in the the document.

• jQuery
• jQuery UI
• jQuery UI Touch Punch: for touch support (OPTIONAL)
• gridstack.poly.js: for IE and older browsers (OPTIONAL)

<!-- Local -->
<link href="/path/to/gridstack.css" rel="stylesheet" />
<!-- Or From A CDN -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/gridstack.min.css" />

2. Include the jQuery Gridstack.js plugin and other required resources at the end of the document.

<!-- Dependencies -->
<script src="/path/to/cdn/jquery.min.js"></script>
<script src="/path/to/cdn/jquery-ui.min.js"></script>
<script src="/path/to/cdn/jquery.ui.touch-punch.min.js"></script>

<!-- jQuery Gridstack.js -->
<script src="gridstack.all.js"></script>
<!-- Or from a CDN -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/gridstack.all.js"></script>
<!-- Polyfill for old IE -->
<script src="gridstack.poly.js"></script>

3. Create a sample draggable grid layout as follows.

• gs-animate: turns animation on (for grid)
• gs-column: amount of columns (for grid)
• gs-max-row: maximum rows amount, defaults to 0 (for grid)
• gs-current-height: current rows amount (for grid)
• gs-id: unique ID (for item)
• gs-x, data-gs-y: element position (for item)
• gs-width, data-gs-height: element size (for item)
• gs-max-width, gs-min-width, gs-max-height, gs-min-height: element constraints (for item)
• gs-no-resize: disable element resizing (for item)
• gs-no-move: disable element moving (for item)
• gs-auto-position: tells to ignore data-gs-x and data-gs-y attributes and to place element to the first available position (for item)
• gs-locked: the widget will be locked. It means another widgets couldn't move it during dragging or resizing. The widget is still can be dragged or resized. You need to add data-gs-no-resize and data-gs-no-move attributes to completely lock the widget (for item)
• gs-resize-handles: resize handles (for item)
• gs-static-grid: whether to make grid static

<div class="grid-stack" data-gs-width="12">
  <div class="grid-stack-item" gs-x="0" data-gs-y="0" gs-width="4" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="4" data-gs-y="0" gs-width="4" gs-height="4">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="8" gs-y="0" gs-width="2" gs-height="2" gs-min-width="2" gs-no-resize="yes">
    <div class="grid-stack-item-content"> <span class="fa fa-hand-o-up"></span> Drag me! </div>
  </div>
  <div class="grid-stack-item" gs-x="10" gs-y="0" gs-width="2" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="0" gs-y="4" gs-width="2" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="2" gs-y="4" gs-width="2" gs-height="4">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="8" gs-y="4" gs-width="4" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="0" gs-y="6" gs-width="2" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="4" gs-y="6" gs-width="4" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="8" gs-y="6" gs-width="2" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
  <div class="grid-stack-item" gs-x="10" gs-y="6" gs-width="2" gs-height="2">
    <div class="grid-stack-item-content"></div>
  </div>
</div>

4. Call the plugin and create a responsive & fluid 12 columns grid layout.

$(function () {
  $('.grid-stack').gridstack({
    column: 12
  });
});

5. All possible options and defaults available.

$('.grid-stack').gridstack({

  // accept widgets dragged from other grids or from outside
  // true (uses '.grid-stack-item' class filter) or false
  // string for explicit class name
  // function (i: number, element: Element): boolean
  acceptWidgets: false,

  // turns animation on
  animate: false,

  // amount of columns
  column: 12,

  // max/min number of rows
  maxRow: 0,
  minRow: 0

  // maximum rows amount
  height: 0, 

  // widget class
  itemClass: 'grid-stack-item',

  // class for placeholder
  placeholderClass: 'grid-stack-placeholder',

  // text for placeholder
  placeholderText: '',

  // draggable handle selector
  handle: '.grid-stack-item-content',

  // class for handle
  handleClass: null,

  // allow for selecting older behavior (adding STYLE element to HEAD element instead of parentNode)
  styleInHead: false,

  // one cell height
  cellHeight: 60,

  // gap size
  // e.g. '5px 10px 0 20px' or '5em 10em'
  margin: 10,

  // unit
  verticalMarginUnit: 'px',
  cellHeightUnit: 'px',

  // if false it tells to do not initialize existing items
  auto: true,
  
  // minimal width.
  minWidth: 768,

  // class set on grid when in one column mode
  oneColumnModeClass: 'grid-stack-one-column-mode',

  // set to true if you want oneColumnMode to use the DOM order and ignore x,y from normal multi column layouts during sorting. This enables you to have custom 1 column layout that differ from the rest.
  oneColumnModeDomSort: false,

  // enable floating widgets
  float: false,

  // makes grid static
  staticGrid: false,

  // if true the resizing handles are shown even the user is not hovering over the widget
  alwaysShowResizeHandle: false,

  // allows to owerride jQuery UI draggable options
  draggable: {handle: '.grid-stack-item-content', scroll: true, appendTo: 'body', containment: null},

  // let user drag nested grid items out of a parent or not
  dragOut: false,

  // allows to owerride jQuery UI resizable options
  resizable: {autoHide: true, handles: 'se'},

  // disallows dragging of widgets
  disableDrag: false

  // disallows resizing of widgets
  disableResize: false,

  // if `true` turns grid to RTL. 
  // Possible values are `true`, `false`, `'auto'`
  rtl: 'auto',

  // if `true` widgets could be removed by dragging outside of the grid
  removable: false,

  // time in milliseconds before widget is being removed while dragging outside of the grid
  removeTimeout: 2000,

  // CSS class when in one column mode
  disableOneColumnMode: 'grid-stack-one-column-mode',

  // class that implement drag'n'drop functionallity for gridstack
  ddPlugin: null

});

6. API methods methods.

// Creates a new widget.
grid.addWidget(el, x, y, width, height, autoPosition, minWidth, maxWidth, minHeight, maxHeight, id);

// Initailizes batch updates. 
// You will see no changes until commit method is called.
grid.batchUpdate();

// Relayout grid items to reclaim any empty space.
grid.compact();

// Gets current cell height.
grid.cellHeight();

// Update current cell height.
// grid.cell_height(grid.cell_width() * 1.2);
grid.cellHeight(val, noUpdate);

// Gets current cell width.
grid.cellWidth();

// Returns current vertical margin value.
grid.verticalMargin();

// value - new vertical margin value.
// noUpdate - if true, styles will not be updated.
grid.verticalMargin(value, noUpdate)

// Finishes batch updates. Updates DOM nodes. You must call it after batch_update.
grid.Commit();

// set/get floating widgets
grid.float(val);

// Disables / enables widgets moving/resizing.
grid.movable('.grid-stack-item', false);
grid.resizable('.grid-stack-item', true); 

// Get the position of the cell under a pixel on screen.
// position - the position of the pixel to resolve in absolute coordinates, as an object with top and leftproperties
// useOffset - if true, value will be based on offset vs position (Optional. Default false). Useful when grid is within position: relative element
// Returns an object with properties x and y i.e. the column and row in the grid.
grid.getCellFromPixel(position, useOffset);

// Checks if specified area is empty.
grid.isAreaEmpty(x, y, width, height);

// Locks/unlocks widget.
// el - widget to modify.
// val - if true widget will be locked.
grid.locked(el, val);

// Make new widgets after new items are appended to the grid.
grid.makeWidget(el);

// Set the minWidth/maxWidth for a widget.
grid.minWidth(el, val);
grid.maxWidth(el, val);

// Set the minHeight/maxWidth for a widget.
grid.minHeight(el, val);
grid.maxHeight(el, val);

// Removes widget from the grid.
// detachNode - if false node won't be removed from the DOM
grid.removeWidget(el, detachNode);

// Removes all widgets from the grid.
// detachNode - if false node won't be removed from the DOM
grid.removeAll(detachNode);

// Changes widget size
grid.resize(el, width, height);

// Changes widget position
grid.move(el, x, y);

// Enables/Disables resizing.
grid.resizable(el, val);

// Enables/Disables moving.
grid.movable(el, val);

// Updates widget position/size.
grid.update(el, x, y, width, height);

// Returns true if the height of the grid will be less the vertical constraint. Always returns true if grid doesn't have height constraint.
grid.willItFit(x, y, width, height, autoPosition);

// Toggle the grid animation state.
// doAnimate - if true the grid will animate.
grid.setAnimation(doAnimate);

// Modify number of columns in the grid
// doNotPropagate - if true existing widgets will not be updated.
// NOTE: Use column() instead in v1.0+
grid.setColumn(column, doNotPropagate);

// Update widget position/size.
grid.setStatic(staticValue);

// Toggle the grid static state
// staticValue - if true the grid becomes static.
grid.update(el, x, y, width, height));

// Destroy the instance
// detachGrid - if false nodes and grid will not be removed from the DOM
grid.destroy([detachGrid]);

// Enables/disables the plugin
grid.enable();
grid.disable();

// Enables/disables widget moving. includeNewWidgets will force new widgets to be draggable as per doEnable's value by changing the disableDrag grid option.
grid.enableMove(doEnable, includeNewWidgets);

// Enables/disables widget resizing. includeNewWidgets will force new widgets to be resizable as per doEnable's value by changing the disableResize grid option. 
grid.enableResize(doEnable, includeNewWidgets);

7. Event listeners available.

$('.grid-stack').on('added', function(event, items) {
  // after new items are added
});

$('.grid-stack').on('change', function(event, items) {
  // fired on change
});

$('.grid-stack').on('disable', function(event) {
  // var grid = event.target;
});

$('.grid-stack').on('dragstart', function(event, ui) {
  // var grid = this;
  // var element = event.target;
});

$('.grid-stack').on('dragstop',  function(event, ui) {
  // var grid = this;
  // var element = event.target;
});

$('.grid-stack').on('dropped',  function(event, previousWidget, newWidget) {
  // after dropped
});

$('.grid-stack').on('enable',  function(event) {
  // var grid = event.target;
});

$('.grid-stack').on('removed',  function(event, items) {
  // after removed
});

$('.grid-stack').on('resizestart',  function(event, ui) {
  // var grid = this;
  // var element = event.target;
});

$('.grid-stack').on('gsresizestop',  function(event, items) {
  // on stop resizing
});

Changelog:

v6.0.2 (2022-09-24)

• bugfixes

v6.0.1 (2022-08-28)

• bugfixes

v6.0.0 (2022-08-22)

• converted previous HTML5 draggable=true based code to simple Mouse Events and Touch mobile support for drag&Drop.
• removed all jquery-ui related code, and D&D plugging as we only support native events now
• alwaysShowResizeHandle now support 'mobile' which is the default, making it much easier
• changed commit() to be batchUpdate(false) to make it easier to turn batch on/off. updated doc. old API remains for now

v5.1.1 (2022-06-17)

• bugfix

v5.1.0 (2022-05-22)

• add GridStack.registerEngine() to let user use their own custom layout engine subclass. Thank you [Thomas] for sponsoring it.
• grid option minWidth is now oneColumnSize to make it clearer, but old field will still work (JS only) for a while
• fixed restore animation when dragging items
• updated jquery-ui to latest v1.13.1

v5.0.0 (2022-01-11)

• add support dragging into and out of nested grids from parents.
• add new column:'auto' option to size nested grids to their parent grid item column count, keeping items the same size inside and outside.
• fix nested.html: dragging between sub-grids show items clipped
• fix dragging between vertical grids causes too much growth, not follow mouse.
• fix no longer force rows for min-height

v4.4.1 (2021-12-25)

• Bugfix

v4.4.0 (2021-12-22)

• add support for IE (new es5 folder)
• bugfix

v4.3.1 (2021-10-19)

• fix prevent swap during resize
• fix save highest resolution in 1 column mode
• fix resize when padding is large vs cellHeight

v4.3.0 (2021-10-16)

• you can now swap items of different width if they are the same row/height
• fix nested grid save inf loop fix

v4.2.7 (2021-09-13)

• Fixed: Enable passing of DragEvent to gridstack dropped event.
• Fixed: Layout incorrectly restored when node has a minimum width. 
• Fixed: addGrid() does not recognize rem cellHeightUnit.

v4.2.6 (2021-07-12)

• fixed: removable:true working by itself (without needing acceptWidgets:true)
• fixed: removed drag flicker and scroll issue. 
• fixed: save(false) will no longer have .content field (removed existing one if present)
• fixed: save(false, false) now correctly saves nested grids
• fixed: save(false, true) followed by enable() throws error. we now have new Utils.cloneDeep()

v4.2.5 (2021-05-31)

• fix for website with JQ droppable('destroy') giving error

v4.2.4 (2021-05-30)

• fix removable:true working again (broke in 4.x)
• fix staticGrid(false) will now enable drag in behavior (if set)
• fix locked item can be user moved/resized again, just not pushed by other nodes (broke in 1.1.1)
• fix destroy(false) can now re-init properly (doesn't force static grid)

v4.2.3 (2021-05-08)

• Utils.getScrollParent() -> getScrollElement() rename
• fix digression on scrolling in v4.2.1

v4.2.2 (2021-04-24)

• fix mac Safari H5 draggable broken in 4.0.1
• fix mac Safari page scroll fix

v4.2.1 (2021-04-19)

• fixed: JQ nested grid drag fix broken in 4.0.3 (but much older underlying issue)
• fixed: item gs-x:0 not animating fix
• fixed: resize-scroll issue when grid is not at top of page. Thanks @Manfred-on-github
• fixed: fix sizing from top/left sides

v4.2.0 (2021-04-12)

• fixed: scrollbar fix broken in 4.x
• fixed: addWidget() while in 1 column now remembers original wanted width
• added: addWidget() now supports nested grids like init/addGrid() does

v4.1.0 (2021-04-08)

• fixed Can't easily drag widgets below widgets on the bottom border of a grid
• when dragging an item at the bottom below others to make it easier to insert below.
• more fix for drag between 2 grids with row / maxRow broken in 4.x
• fix export symbols .d.ts for gridstack-h5.js | gridstack-jq.js | gridstack-static.js
• fix correct info for using JQ version and ES6 (tested in Angular app)

v4.0.3 (2021-03-29)

• fix load after init() broken in 4.x
• fix drag between 2 grids with row / maxRow broken in 4.x
• fix drag edge case in/out single grid without acceptWidgets fix broken in 4.x

v4.0.2 (2021-03-28)

• fix: {handles:'w/sw'} work again in 4.x
• fix: enableMove(T/F) not working correctly
• fix helper: myFunction now working for H5 case for dragInOptions & setupDragIn()
• fix: prevent addGrid() from creating nested div grid if container already is a '.grid-stack' div

v4.0.1 (2021-03-21)

• fix JQ resize broken
• fix serialization of nested grid

v4.0.0 (2021-03-20)

• add drag | resize events while dragging
• add GridStack.setupDragIn() so user can update external draggable after the grid has been created
• fixed bugs

v3.3.0 (2021-02-03)

• big re-write on how cellHeight() works. you can now call it at any time (not just grid init options) including switching to 'auto' or other modes on the fly.
• fix cellHeight:auto now keeps cell square as window resizes (regressing from 2.x TS conversion). Utils.throttle() works better too (guaranteed to be called last event)
• new cellHeight:initial which makes the cell squares initially, but doesn't change as windows resizes (better performance)
• new grid option cellHeightThrottle (100ms) to control throttle of auto sizing triggers
• fixed: height too small with cellHeight:auto loading in 1 column. Now detect we load at 1 column and size accordingly (default 'auto' could make big 700x700 cells, so explicit px might still be wanted)
• fixed: loading nested into small size and sizing back up
• fixed: nested grid resizing fix
• fixed: H5 resize from left side can move item right

v3.2.0 (2021-01-26)

• fix website & lib works on mobile. We now compile the latest v1.0.8 jquery.ui.touch-punch into the JQ version (only 2k) so mobile devices (android, iphone, ipad, ms surface, etc...) are supported out of the box. HTML5 version will require re-write to plain mousemove & mobile touchmove instead of drag events in a future release.
• small optimizations (create placeholder content on the fly, moved more DD code into draggable class)

v3.1.5 (2021-01-24)

• fix column: N option now sets CSS class
• fix don't allow drop when grid is full
• fix easier to drag out/in from below
• fix cellHeight() not updating CSS correctly
• fix H5 draggable by actual div handle rather than entire item (let content respond to drag as well)

v3.1.4 (2021-01-12)

• fix no-drop cursor on windows when dragging within a default grid (no external drag in)
• fix Safari H5 delay when dropping items

v3.1.3 (2021-01-03)

• bugfixes

v3.1.2 (2020-12-08)

• fix dragging into a fixed row grid works better (check if it will fit, else try to append, else won't insert)
• possible BREAK (unlikely you use engine directly)
• engine constructor takes Options struct rather than spelling arguments (easier to extend/use)
• canBePlacedWithRespectToHeight() -> willItFit() like grid method
• fix maxW does not work as intended with resizable handle "w"
• fix support all options for new dragged in widgets (read all gs-xyz attributes)
• fix dragging any grid item content works
• fix web-component fixes & grid with 0 size initially. (edited)

v3.1.0 (2020-12-05)

• add new addGrid(parent, opts) to create a grid and load children instead of init() + load(), which is used by load() to supports nested grids creation.
• save() will now work on nested grids, recursively saving info. added flag to also allow saving the current grid options + children (needed for nested grids) so you can now call new adddGrid() to re-create everything from JSON.
• fixed: don't call movable()/resizable() on locked items error. 
• fixed: force typescript 3.6 as 3.7+ has breaking change forcing apps to be at least 3.7 (we only used one tiny feature in newest TS, not worth the incompatibility).

v3.0.0 (2020-11-30)

• Native HTML5 drag&drop plugin included
• Fix placeholder not having custom GridStackOptions.itemClass. thanks @pablosichert
• Fix dragging between 2 grids and back (regression in 2.0.1)
• Fix load() into 1 column mode doesn't resize back to 12 correctly
• Fix update(el, opts) re-write to take all GridStackWidget options (not just x,y,width,height) and do everything efficiently.
• Hiding locked(), move(), resize(), minWidth(), etc... as they just simply call update() which does all the constrain now as well!
• Del ddPlugin grid option as we only have one drag&drop plugin at runtime, which is defined by the include you use (HTML5 vs jquery vs none)
• Change attribute data-gs-min-width is now gs-min-w. We removed 'data-' from all attributes, and shorten 'width|height' to just 'w|h' to require less typing and more efficient (2k saved in .js alone!)
• Also GridStackWidget used in most API width|height|minWidth|minHeight|maxWidth|maxHeight are now shorter w|h|minW|minH|maxW|maxH

v2.2.0 (2020-11-08)

• add margin option now support multi values CSS format '5px 10px 0 20px' or '5em 10em'
• add data-gs-static-grid attribute
• fix class="ui-draggable-disabled ui-resizable-disabled" have been added back to static grid items, so existing CSS rule to style continue working
• fix getting DOM element by id with number works (api that uses GridStackElement handle more string formats)
• fix setting marginTop (or any 4 sides) to cause resize to break

v2.1.0 (2020-10-29)

• fix grid static: true to no longer add any drag&drop (even disabled) which should speed things up, and setStatic(T/F) will now correctly add it back/delete for items that need it only.
• Also fixed JQ draggable warning if not initialized first
• add addWidget(opt) now handles just passing a GridStackWidget which creates the default divs, simplifying your code. Old API still supported.
• add save(saveContent = true) now lets you optionally save the HTML content in the node property, with load() restoring it
• add GridStackWidget.content now lets you add any HTML content when calling load()/save() or addWidget()
• add ColumnOptions to column(n, options) for multiple re-layout options, including 'none' that will preserve the x and width, until out of bound/overlap

v2.0.2 (2020-10-06)

• fix animate to not re-create CSS style each time (should be faster too) and made it default now since so much nicer. pass {animate: false} grid options if you want instant again
• fix resizable: { handles: ...} forcing alwaysShowResizeHandle behavior

v2.0.1 (2020-09-27)

• lots of bugs fixes

v2.0.0 (2020-09-05)

• re-write to native Typescript, removing all JQuery from main code and API (drag&drop plugin still using jqueryui for now)
• add getGridItems() to return list of HTML grid items
• add {dragIn | dragInOptions} grid attributes to handle external drag&drop items
• add save() and load() to serialize grids from JSON, saving all attributes (not just w,h,x,y)
• add margin to replace verticalMargin which affects both dimensions in code, rather than one in code the other in CSS.
• You can now have perfect square cells (default)
• fix #1299 many columns round-off error
• fix #1102 loose functionality when they are moved to a new grid
• add optional params to removeWidget() to have quiet mode (no callbacks)

v1.2.1 (2020-09-05)

• Enable the UMD behavior for bundlers compatibility

v1.2.0 (2020-05-18)

• fix domAttr is not defined
• adds styleInHead option to allow for selecting older behavior (adding STYLE element to HEAD element instead of parentNode)
• update jquery to v3.5.1

v1.1.2 (2020-05-18)

• fixed: staticGrid no longer disable oneColumnMode
• fixed: options broken with ember hash helper - thanks @btecu
• fixed: don't remove item from another grid
• fixed: init() clones passed options so second doesn't affect first one
• fixed: addWidget() ignores data attributes

v1.1.1 (2020-04-13)

• jQuery was removed from the API and dependencies (initialize differently, and methods take/return GridStack or HTMLElement instead of JQuery).
• Updated Doc accordingly.

v0.6.4 (2020-02-18)

• optimized change callback to save original x,y,w,h values and only call those that changed
• more bugs fixed

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This awesome jQuery plugin is developed by gridstack. For more Advanced Usages, please check the demo page or visit the official website.