EC
TS2660
TypeScriptERRORNotableTypeHIGH confidence

'super' can only be referenced in members of derived classes or object litera...

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2660): 'super' can only be referenced in members of derived classes or object literal expressions.. This diagnostic is emitted by the TypeScript compiler when 'super' can only be referenced in members of derived classes or object literal expressions..

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

TypeScript compiler reports TS2660 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2660
// 'super' can only be referenced in members of derived classes or object literal expressions.

expected output

error TS2660: 'super' can only be referenced in members of derived classes or object literal expressions.

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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