EC
TS95156
TypeScriptERRORNotableConfigHIGH confidence

Add missing function declaration 'X'

Production Risk

Build will fail; resolve before shipping.

What this means

A TypeScript diagnostic (TS95156): Add missing function declaration 'X'. This diagnostic is emitted by the TypeScript compiler when add missing function declaration '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 TS95156 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS95156
// Add missing function declaration 'X'

expected output

error TS95156: Add missing function declaration '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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