gridstack · adumesny · Jan 15, 2025 · Jan 15, 2025
diff --git a/demo/index.html b/demo/index.html
@@ -25,6 +25,7 @@ <h1>Demos</h1>
     <li><a href="react.html">ReactJS</a></li>
     <li><a href="responsive.html">Responsive: by column size</a></li>
     <li><a href="responsive_break.html">Responsive: using breakpoints</a></li>
+    <li><a href="responsive_none.html">Responsive: using layout:'none'</a></li>
     <li><a href="right-to-left(rtl).html">Right-To-Left (RTL)</a></li>
     <li><a href="serialization.html">Serialization</a></li>
     <li><a href="sizeToContent.html">Size To Content</a></li>

diff --git a/demo/responsive_none.html b/demo/responsive_none.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Responsive layout:'none'</title>
+
+  <link rel="stylesheet" href="demo.css"/>
+  <link rel="stylesheet" href="../dist/gridstack-extra.css"/>
+  <script src="../dist/gridstack-all.js"></script>
+
+</head>
+<body>
+  <div class="container-fluid">
+    <h1>Responsive layout:'none'</h1>
+    <p>show loading a fixed (<b>layout:'none'</b>) but still responsive design (150px columns) with items w:2-4</p>
+    <p>showing how it will not change the layout unless it doesn't fit. loading into small view remembers the full layout (column:6)</p>
+    <div class="grid-stack"></div>
+  </div>
+  <script src="events.js"></script>
+  <script type="text/javascript">
+    let children = [ {}, {}, {}];
+    children.forEach((w, i) => { 
+      w.x=i, w.y=i, // comment out to have autoPosition:true which behaves differently
+      w.w=i+2, w.content = `${i} w:${w.w}`})
+
+    GridStack.init({
+      children,
+      column: 6,
+      cellHeight: 100,
+      columnOpts: {
+        columnWidth: 150,
+        columnMax: 12,
+        layout: 'none',
+      },
+    });
+  </script>
+</body>
+</html>
diff --git a/doc/CHANGES.md b/doc/CHANGES.md
@@ -122,6 +122,7 @@ Change log
 
 ## 11.2.0-dev (TBD)
 * feat: added `isIgnoreChangeCB()` if changeCB should be ignored due to column change, sizeToContent, loading, etc...
+* feat: added `responsive_none.html` demo and fixed layout:'none' to bound check the layout (no-op unless it must change)
 
 ## 11.2.0 (2024-12-29)
 * feat: [#2695](https://github.com/gridstack/gridstack.js/issues/2695) 'Esc' to cancel now works on sidebar external items, also works dragging over trash.

diff --git a/src/gridstack-engine.ts b/src/gridstack-engine.ts
@@ -44,6 +44,8 @@ export class GridStackEngine {
   public _loading?: boolean
   /** @internal true while we are resizing widgets during column resize to skip certain parts */
   protected _inColumnResize?: boolean;
+  /** true when grid.load() already cached the layout and can skip out of bound caching info */
+  public skipCacheUpdate?: boolean;
   /** @internal true if we have some items locked */
   protected _hasLocked: boolean;
   /** @internal unique global internal _id counter */
@@ -415,7 +417,7 @@ export class GridStackEngine {
     // remember it's position & width so we can restore back (1 -> 12 column) #1655 #1985
     // IFF we're not in the middle of column resizing!
     const saveOrig = (node.x || 0) + (node.w || 1) > this.column;
-    if (saveOrig && this.column < this.defaultColumn && !this._inColumnResize && node._id && this.findCacheLayout(node, this.defaultColumn) === -1) {
+    if (saveOrig && this.column < this.defaultColumn && !this._inColumnResize && !this.skipCacheUpdate && node._id && this.findCacheLayout(node, this.defaultColumn) === -1) {
       const copy = {...node}; // need _id + positions
       if (copy.autoPosition || copy.x === undefined) { delete copy.x; delete copy.y; }
       else copy.x = Math.min(this.defaultColumn - 1, copy.x);
@@ -829,9 +831,6 @@ export class GridStackEngine {
   public columnChanged(prevColumn: number, column: number, layout: ColumnOptions = 'moveScale'): GridStackEngine {
     if (!this.nodes.length || !column || prevColumn === column) return this;
 
-    // in this mode no layout is done whatsoever, up to the caller to handle it
-    if (layout === 'none') return this;
-
     // simpler shortcuts layouts
     const doCompact = layout === 'compact' || layout === 'list';
     if (doCompact) {
@@ -900,7 +899,7 @@ export class GridStackEngine {
         if (typeof layout === 'function') {
           layout(column, prevColumn, newNodes, nodes);
         } else {
-          const ratio = doCompact ? 1 : column / prevColumn;
+          const ratio = (doCompact || layout === 'none') ? 1 : column / prevColumn;
           const move = (layout === 'move' || layout === 'moveScale');
           const scale = (layout === 'scale' || layout === 'moveScale');
           nodes.forEach(node => {

diff --git a/src/gridstack.ts b/src/gridstack.ts
@@ -696,15 +696,14 @@ export class GridStack {
     // sort items. those without coord will be appended last
     items = Utils.sort(items);
 
+    this.engine.skipCacheUpdate = this._ignoreLayoutsNodeChange = true; // skip layout update
+
     // if we're loading a layout into for example 1 column and items don't fit, make sure to save
     // the original wanted layout so we can scale back up correctly #1471
     let maxColumn = 0;
     items.forEach(n => { maxColumn = Math.max(maxColumn, (n.x || 0) + n.w) });
     if (maxColumn > this.engine.defaultColumn) this.engine.defaultColumn = maxColumn;
-    if (maxColumn > column) {
-      this._ignoreLayoutsNodeChange = true; // skip layout update
-      this.engine.cacheLayout(items, maxColumn, true);
-    }
+    if (maxColumn > column) this.engine.cacheLayout(items, maxColumn, true);
 
     // if given a different callback, temporally set it as global option so creating will use it
     const prevCB = GridStack.addRemoveCB;
@@ -778,6 +777,7 @@ export class GridStack {
 
     // after commit, clear that flag
     delete this._ignoreLayoutsNodeChange;
+    delete this.engine.skipCacheUpdate;
     prevCB ? GridStack.addRemoveCB = prevCB : delete GridStack.addRemoveCB;
     // delay adding animation back
     if (blank && this.opts?.animate) this.setAnimation(this.opts.animate, true);
@@ -1098,12 +1098,13 @@ export class GridStack {
 
     // if we're adding an item into 1 column make sure
     // we don't override the larger 12 column layout that was already saved. #1985
-    if (this.opts.column === 1) {
-      this._ignoreLayoutsNodeChange = true;
+    let resetIgnoreLayoutsNodeChange: boolean;
+    if (this.opts.column === 1 && !this._ignoreLayoutsNodeChange) {
+      resetIgnoreLayoutsNodeChange = this._ignoreLayoutsNodeChange = true;
     }
     this._triggerAddEvent();
     this._triggerChangeEvent();
-    delete this._ignoreLayoutsNodeChange;
+    if (resetIgnoreLayoutsNodeChange) delete this._ignoreLayoutsNodeChange;
 
     return el;
   }