Method addNode

src/gridstack-engine.ts:756–777

* Add the given node to the grid, handling collision detection and re-packing. * This is the main method for adding new widgets to the engine. * * @param node the node to add to the grid * @param triggerAddEvent if true, adds node to addedNodes list for event triggering * @param after

(node: GridStackNode, triggerAddEvent = false, after?: GridStackNode)

   * const added = engine.addNode(node, true);
   */
  public addNode(node: GridStackNode, triggerAddEvent = false, after?: GridStackNode): GridStackNode {
    const dup = this.nodes.find(n => n._id === node._id);
    if (dup) return dup; // prevent inserting twice! return it instead.

    // skip prepareNode if we're in middle of column resize (not new) but do check for bounds!
    this._inColumnResize ? this.nodeBoundFix(node) : this.prepareNode(node);
    delete node._temporaryRemoved;
    delete node._removeDOM;

    let skipCollision: boolean;
    if (node.autoPosition && this.findEmptyPosition(node, this.nodes, this.column, after)) {
      delete node.autoPosition; // found our slot
      skipCollision = true;
    }

    this.nodes.push(node);
    if (triggerAddEvent) { this.addedNodes.push(node); }

    if (!skipCollision) this._fixCollisions(node);
    if (!this.batchMode) { this._packNodes()._notify(); }
    return node;
  }

  /**
   * Remove the given node from the grid.