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refactoring

Refactor Handsontable code by separating plugin responsibilities, reducing dependencies, batching rendering work, and updating coding patterns. It provides compatibility rules and testing guidance to preserve existing APIs, CSS classes, settings, and behavior.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

원문원문 설명 보기

Use when refactoring Handsontable code - applying SOLID principles, Law of Demeter, plugin extraction, performance optimization, code modernization, and API redesign with backward compatibility preservation

설치 방법 보기

이럴 때 유용합니다

  • Split an oversized plugin into focused plugins
  • Reduce repeated rendering during bulk updates
  • Update private fields and callback patterns
  • Redesign APIs while preserving existing names

포함된 파일(1)

  • SKILL.md3.2 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

Conventions over configuration

Eliminate config that naming, location, or type conventions already express. Use auto-discovery or lifecycle hooks in place of new options or wiring.

Handsontable specifics

  • Single responsibility: one concern per plugin; extract a second concern into its own plugin.
  • Open/closed: extend through hooks and the plugin system; new logic listens for hooks.
  • Liskov: honor the BasePlugin contract (isEnabled, enablePlugin, disablePlugin, updatePlugin, destroy, required static properties).
  • Interface segregation: keep public plugin APIs narrow; expose a focused method through hot.getPlugin('{Name}').
  • Dependency inversion: depend on hooks; reach another plugin's API through hot.getPlugin('{Name}'), never by importing its class.
  • Law of Demeter: replace chains like this.hot.view.wt.wtTable.holder with a method on the intermediate layer.

Patterns

  • Plugin extraction: when logic in core.js or a large plugin outgrows one responsibility, move it to a dedicated plugin that communicates through new hooks.
  • Performance:
    • forEach loop in place of arr.push(...largeArray) (stack overflow at 10k+ elements).
    • Batch render cycles with batch(), batchRender(), suspendRender()/resumeRender().
    • Batch scroll-related work in requestAnimationFrame.
  • Modernization:
    • #privateFields in place of @private JSDoc (exception: when # measurably hurts performance).
    • Arrow-function class fields for hook and event callbacks in place of .bind(this).
    • ?. only for values optional by design.
  • API redesign: keep the old name working (table below).

Breaking changes protection

RuleDetail
Default setting values stay unchangedDefaults in metaSchema.ts.
Keep legacy CSS class namesAdd new names alongside old ones; old names stay in the DOM.
Legacy API names keep working with no console warning"Legacy", not "deprecated".
Deprecated APIs get a one-time warningdeprecatedWarn() from src/helpers/console.ts; works until the next major release.
Removed hooks go on the removed listUsers get a clear error instead of silent failure.

Maintainability

  • Cognitive complexity at most 15 per function (Sonar); extract helpers or use early returns above it.
  • Reuse helpers from src/helpers/ before writing new ones.
  • Method order: public methods first, then private listeners.

Tests after refactoring

  • Unit (*.unit.js): extracted helpers, strategies, pure logic.
  • E2E (Playwright tests/e2e/*.spec.ts): feature still works in the browser. Edit an existing Jasmine *.spec.js only to keep it passing; never add a new one. A pure refactor with no behavior change can use a Refactor-only: <reason> commit trailer instead of a new test.
  • Backward compatibility: legacy API names, CSS classes, and option names still work.
  • Performance: for data-heavy paths, unit tests with 50k+ rows.

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