EC
TS1170
TypeScriptERRORNotableSyntaxHIGH confidence

A computed property name in a type literal must refer to an expression whose ...

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1170): A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.. This diagnostic is emitted by the TypeScript compiler when a computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type..

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

TypeScript compiler reports TS1170 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1170
// A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.

expected output

error TS1170: A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.

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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