EC
TS18060
TypeScriptERRORNotableTypeHIGH confidence

Deferred imports are only supported when the '--module' flag is set to 'esnex...

Production Risk

Build will fail; resolve before shipping.

What this means

A TypeScript diagnostic (TS18060): Deferred imports are only supported when the '--module' flag is set to 'esnext' or 'preserve'.. This diagnostic is emitted by the TypeScript compiler when deferred imports are only supported when the '--module' flag is set to 'esnext' or 'preserve'..

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

TypeScript compiler reports TS18060 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS18060
// Deferred imports are only supported when the '--module' flag is set to 'esnext' or 'preserve'.

expected output

error TS18060: Deferred imports are only supported when the '--module' flag is set to 'esnext' or 'preserve'.

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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