30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
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# DataTable Surgical Migration Plan (Safety First)
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## Current Status: Clean Baseline
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- Source: v1.0.1
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- Performance: ~16ms Keyed Refresh (verified)
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- Frame: @web/state v1.0.11 (Node Recycling enabled)
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## Phase 1: Zero-Interaction Infrastructure
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- [ ] **Step 1.1: Column Width Pre-computation**. Move `width` calculation from template to `fields` watch. No logic change.
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- [ ] **Step 1.2: Column Pinning Pre-computation**. Move `left/right` offset logic to `fields` watch.
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- [ ] **Step 1.3: Apply Pre-computed Styles**. Update template to use `f._preStyle`.
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- *Checkpoint*: Verify scrolling smoothness.
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## Phase 2: Primitive Interaction (Selection)
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- [ ] **Step 2.1: Top-level Coordinate State**. Add `activeCell: { rIdx, fIdx }` to state.
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- [ ] **Step 2.2: Safe MouseDown Listener**. Add listener that only sets `activeCell` without touching `state.list`.
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- [ ] **Step 2.3: Orderly MouseUp Cleanup**. Implement global listener to terminate selection mode.
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- *Checkpoint*: Verify click doesn't "stick" and no lag.
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## Phase 3: Advanced Features (Port one by one)
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- [ ] **Step 3.1: Resizer Integration**.
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- [ ] **Step 3.2: JIT Row Proxying for Edit**. (Discuss implementation details first).
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- [ ] **Step 3.3: Metadata & Icons**.
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## Mandatory Procedure
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1. Implement ONE step.
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2. Run `npm run test` + Manual browser check.
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3. Report Benchmark & Interaction status.
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4. WAIT for user confirmation.
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