What is the Neural Link?

The Neural Link is a bi-directional bridge that connects AI agents directly to the Neo.mjs runtime. It lets agents inspect the Scene Graph, component state, event listeners, computed styles, and DOM rectangles, and mutate the running application in real time.

Why is Neo.mjs called an Application Engine instead of a framework?

Neo.mjs maintains persistent application objects in a worker-backed Scene Graph instead of compiling application state away into ephemeral DOM nodes. That architecture enables multi-window orchestration, runtime permutation, and deep AI introspection.

What is Context Engineering?

Context Engineering shapes the information and tool environment around AI agents. Neo.mjs implements it through Knowledge Base, Memory Core, GitHub Workflow, and Neural Link MCP servers for frontier harnesses, plus a File System MCP server for internal Neo.ai.Agent local loops.

What is the Neo.mjs Agent OS?

The Neo.mjs Agent OS is the repository Brain: source code and services for Memory Core, Knowledge Base, Active Hybrid GraphRAG, DreamService, Golden Path synthesis, A2A coordination, and Neural Link tooling.

Frontmatter

id	9442
title	Fix Grid Pooling DOM thrashing and Collection internalId lookup
state	Closed
labels	bugaicoregrid
assignees	tobiu
createdAt	Mar 11, 2026, 2:27 PM
updatedAt	Mar 11, 2026, 3:30 PM
githubUrl	https://github.com/neomjs/neo/issues/9442
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
contentTrust
projected
quarantined	0
signals	[]
blockedBy	[]
blocking	[]
closedAt	Mar 11, 2026, 3:30 PM

Fix Grid Pooling DOM thrashing and Collection internalId lookup

Closed v12.1.0/archive-v12-1-0-chunk-1 bugaicoregrid

tobiu commented on Mar 11, 2026, 2:27 PM

Goal

Stabilize unit tests by addressing grid pooling DOM thrashing, fixing a cell recycling TypeError, and improving internalId support in collection lookups.

Issues Addressed

Grid Pooling (src/grid/Body.mjs): Prevented cellPoolSize from shrinking during regular horizontal scrolling unless forced, preventing unnecessary DOM cell removal and recreation (DOM thrashing). This fixes the Pooling.spec.mjs tests.
Cell Recycling (src/grid/Row.mjs): Added optional chaining (node?.data?.field) when mapping existing cells to prevent a TypeError: Cannot read properties of null when a node has no data. This fixes the GridScrollProfile.spec.mjs test.
Collection Lookups (src/collection/Base.mjs): Simplified indexOf and indexOfKey to use the internal this.get(key) method. This makes the code cleaner and inherently adds internalId support to index lookups, paving the way for fixing the GalleryInternalId tests.

tobiu Mar 11, 2026, 2:28 PM

Input from Gemini 3.1 Pro:

✦ I have applied the following fixes to stabilize the tests:

src/grid/Body.mjs: Prevented shrinking of cellPoolSize during horizontal scrolling, which eliminates the DOM thrashing seen in Pooling.spec.mjs.

src/grid/Row.mjs: Added optional chaining (node?.data?.field) to prevent a TypeError in GridScrollProfile.spec.mjs during cell recycling.

src/collection/Base.mjs: Cleaned up indexOf and indexOfKey to use this.get(key). This resolves the internalId lookup issues.

The tests have improved, though GalleryInternalId.spec.mjs is still failing due to other problems with Gallery's selection model which we are investigating next.