effect-do-notation.md

effectDoNotation

Suggests using Effect.gen or Effect.fn instead of the Effect.Do notation helpers

Property	Value
Category	Style
Default severity	off
Fixable	No
Effect versions	v3, v4
Diagnostic codes	TS377085
Language Service name	effectDoNotation
Oxlint name	effecttsgo/effect-do-notation

Preview

import { Effect } from "effect"
import { pipe } from "effect/Function"

export const preview = pipe(
  Effect.Do,
/**
  ^^^^^^^^^ effecttsgo(effect-do-notation): This uses the Effect do emulation. `Effect.gen` or `Effect.fn` achieve the same result with native JS scopes.
*/
  Effect.bind("a", () => Effect.succeed(1)),
  Effect.let("b", ({ a }) => a + 1),
  Effect.bind("c", ({ b }) => Effect.succeed(b.toString()))
)

Language Service Configuration

See the Language Service setup guide for installation instructions.

{
  "$schema": "./node_modules/@effect/tsgo/schema.json",
  "compilerOptions": {
    "plugins": [
      {
        "name": "@effect/language-service",
        "diagnosticSeverity": {
          "effectDoNotation": "warning"
        }
      }
    ]
  }
}

Oxlint Configuration

See the Oxlint setup guide for installation and patching instructions.

{
  "$schema": "./node_modules/@effect/tsgo/oxlint-schema.json",
  "options": {
    "typeAware": true
  },
  "plugins": ["effecttsgo"],
  "rules": {
    "effecttsgo/effect-do-notation": "warn"
  }
}