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SKILL_JS5_ARCGIS / arcgis-feature-effects

AGENTS.md1 starsChanged 6 months agoMITView on GitHub

Quick-reference for layer/feature effects. Read before adding visual emphasis.

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AGENTS.md

Agent Guide: arcgis-feature-effects

Quick-reference for layer/feature effects. Read before adding visual emphasis.

Quick Decision Tree

  1. Whole layer? → layer.effect = "<filter string>".
  2. Subset emphasis? → layer.featureEffect = FeatureEffect({ filter, includedEffect, excludedEffect }).
  3. Truly remove features? → use definitionExpression, not opacity(0%).

Setup Checklist

  • Effect values include units (2px, 40%).
  • FeatureFilter uses where / geometry / timeExtent.
  • Reserve heavy effects (bloom) for small/focus layers.
  • Remember effects are visual only — not a filter.

Anti-patterns (one-liner reminders)

  • ❌ blur(2) without a unit.
  • ❌ Using opacity(0%) to "hide" (still in hitTest): use layerView.filter.
  • ❌ featureEffect without filter expecting a subset (everything is "included").
  • ❌ Effects in a SceneView or on a heatmap (ignored).
  • ❌ Bloom on a dense full layer.

Files in This Skill

  • SKILL.md / SKILL.es.md — full guides
  • references/api-detail.md — effect / FeatureEffect signatures
  • references/examples.md — highlight / dim / filter
  • references/pitfalls.md — extended troubleshooting
  • scripts/snippet-layer-effect.ts, snippet-feature-effect.ts

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