EC
TS2809
TypeScriptERRORNotableTypeHIGH confidence

Declaration or statement expected. This '=' follows a block of statements, so...

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2809): Declaration or statement expected. This '=' follows a block of statements, so if you intended to write a destructuring assignment, you might need to wrap the whole assignment in parentheses.. This diagnostic is emitted by the TypeScript compiler when declaration or statement expected. This '=' follows a block of statements, so if you intended to write a destructuring assignment, you might need to wrap the whole assignment in parentheses..

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

TypeScript compiler reports TS2809 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2809
// Declaration or statement expected. This '=' follows a block of statements, so if you intended to write a destructuring assignment, you might need to wrap the whole assignment in parentheses.

expected output

error TS2809: Declaration or statement expected. This '=' follows a block of statements, so if you intended to write a destructuring assignment, you might need to wrap the whole assignment in parentheses.

Fix

Address the TypeScript diagnostic

WHEN When this error is reported by the compiler

Address the TypeScript diagnostic
// Run the TypeScript compiler for details:
npx tsc --noEmit
// Use the TypeScript playground to test your code:
// https://www.typescriptlang.org/play

Why this works

Review the full error message and location; the TypeScript handbook provides guidance on each error category.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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