EC
TS2855
TypeScriptERRORNotableTypeHIGH confidence

Class field 'X' defined by the parent class is not accessible in the child cl...

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2855): Class field 'X' defined by the parent class is not accessible in the child class via super.. This diagnostic is emitted by the TypeScript compiler when class field 'X' defined by the parent class is not accessible in the child class via super..

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

TypeScript compiler reports TS2855 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2855
// Class field 'X' defined by the parent class is not accessible in the child class via super.

expected output

error TS2855: Class field 'X' defined by the parent class is not accessible in the child class via super.

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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