EC
TS1478
TypeScriptERRORNotableSyntaxHIGH confidence

Identifier or string literal expected.

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1478): Identifier or string literal expected.. This diagnostic is emitted by the TypeScript compiler when identifier or string literal expected..

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

TypeScript compiler reports TS1478 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1478
// Identifier or string literal expected.

expected output

error TS1478: Identifier or string literal expected.

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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