evanw/esbuild · error · Error

Invalid log override: ${key}

Error message

Invalid log override: ${key}

What it means

Error "Invalid log override: ${key}" thrown in evanw/esbuild.

Source

Thrown at lib/shared/common.ts:219

  if (reserveProps) flags.push(`--reserve-props=${jsRegExpToGoRegExp(reserveProps)}`)
  if (mangleQuoted !== void 0) flags.push(`--mangle-quoted=${mangleQuoted}`)

  if (jsx) flags.push(`--jsx=${jsx}`)
  if (jsxFactory) flags.push(`--jsx-factory=${jsxFactory}`)
  if (jsxFragment) flags.push(`--jsx-fragment=${jsxFragment}`)
  if (jsxImportSource) flags.push(`--jsx-import-source=${jsxImportSource}`)
  if (jsxDev) flags.push(`--jsx-dev`)
  if (jsxSideEffects) flags.push(`--jsx-side-effects`)

  if (define) {
    for (let key in define) {
      if (key.indexOf('=') >= 0) throw new Error(`Invalid define: ${key}`)
      flags.push(`--define:${key}=${validateStringValue(define[key], 'define', key)}`)
    }
  }
  if (logOverride) {
    for (let key in logOverride) {
      if (key.indexOf('=') >= 0) throw new Error(`Invalid log override: ${key}`)
      flags.push(`--log-override:${key}=${validateStringValue(logOverride[key], 'log override', key)}`)
    }
  }
  if (supported) {
    for (let key in supported) {
      if (key.indexOf('=') >= 0) throw new Error(`Invalid supported: ${key}`)
      const value = supported[key]
      if (typeof value !== 'boolean') throw new Error(`Expected value for supported ${quote(key)} to be a boolean, got ${typeof value} instead`)
      flags.push(`--supported:${key}=${value}`)
    }
  }
  if (pure) for (let fn of pure) flags.push(`--pure:${validateStringValue(fn, 'pure')}`)
  if (keepNames) flags.push(`--keep-names`)
}

function flagsForBuildOptions(
  callName: string,
  options: types.BuildOptions,

View on GitHub (pinned to 6ff1d8b0d8)

Solutions

1. Ensure the logOverride key is a known esbuild message name
2. Check the log override documentation for the list of overridable message types

Example fix

esbuild.buildSync({ logOverride: { 'equals-negative-zero': 'silent' } });

When it happens

Trigger: Thrown at lib/shared/common.ts:219 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of evanw/esbuild@6ff1d8b0d8 (2026-08-03). Data as JSON: /data/errors/c6248327db28fc48.json. Report an issue: GitHub.