EC
TS1312
TypeScriptERRORNotableSyntaxHIGH confidence

Did you mean to use a ':'? An '=' can only follow a property name when the co...

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1312): Did you mean to use a ':'? An '=' can only follow a property name when the containing object literal is part of a destructuring pattern.. This diagnostic is emitted by the TypeScript compiler when did you mean to use a ':'? An '=' can only follow a property name when the containing object literal is part of a destructuring pattern..

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

TypeScript compiler reports TS1312 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1312
// Did you mean to use a ':'? An '=' can only follow a property name when the containing object literal is part of a destructuring pattern.

expected output

error TS1312: Did you mean to use a ':'? An '=' can only follow a property name when the containing object literal is part of a destructuring pattern.

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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