EC
TS90069
TypeScriptERRORNotableConfigHIGH confidence

Extract to variable and replace with 'X as typeof X'

Production Risk

Build will fail; resolve before shipping.

What this means

A TypeScript diagnostic (TS90069): Extract to variable and replace with 'X as typeof X'. This diagnostic is emitted by the TypeScript compiler when extract to variable and replace with 'X as typeof X'.

Why it happens
  1. 1Incorrect TypeScript syntax or type usage
  2. 2Type mismatch between declared and actual value
How to reproduce

TypeScript compiler reports TS90069 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS90069
// Extract to variable and replace with 'X as typeof X'

expected output

error TS90069: Extract to variable and replace with 'X as typeof X'

Fix

Fix the tsconfig.json option

WHEN When a compiler option is invalid or missing

Fix the tsconfig.json option
// tsconfig.json
{
  "compilerOptions": {
    // Review and correct the flagged option
  }
}
// Run: npx tsc --showConfig to see effective config

Why this works

TypeScript validates tsconfig.json options; check the official tsconfig reference for valid values.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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