EC
TS9035
TypeScriptERRORNotableTypeHIGH confidence

Add satisfies and a type assertion to this expression (satisfies T as T) to m...

Production Risk

Build will fail; resolve before shipping.

What this means

A TypeScript diagnostic (TS9035): Add satisfies and a type assertion to this expression (satisfies T as T) to make the type explicit.. This diagnostic is emitted by the TypeScript compiler when add satisfies and a type assertion to this expression (satisfies T as T) to make the type explicit..

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

TypeScript compiler reports TS9035 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS9035
// Add satisfies and a type assertion to this expression (satisfies T as T) to make the type explicit.

expected output

error TS9035: Add satisfies and a type assertion to this expression (satisfies T as T) to make the type explicit.

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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