EC
TS2513
TypeScriptERRORNotableTypeHIGH confidence

Abstract method 'X' in class 'X' cannot be accessed via super expression.

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2513): Abstract method 'X' in class 'X' cannot be accessed via super expression.. This diagnostic is emitted by the TypeScript compiler when abstract method 'X' in class 'X' cannot be accessed via super expression..

Why it happens
  1. 1A concrete class extends an abstract class but does not implement all abstract members
How to reproduce

TypeScript compiler reports TS2513 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2513
// Abstract method 'X' in class 'X' cannot be accessed via super expression.

expected output

error TS2513: Abstract method 'X' in class 'X' cannot be accessed via super expression.

Fix

Implement all abstract members

WHEN Extending an abstract class

Implement all abstract members
abstract class Base {
  abstract doWork(): void;
}
class Derived extends Base {
  doWork(): void { /* implementation */ }
}

Why this works

All abstract members must be implemented in concrete subclasses.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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