EC
TS1515
TypeScriptERRORNotableSyntaxHIGH confidence

Named capturing groups with the same name must be mutually exclusive to each ...

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1515): Named capturing groups with the same name must be mutually exclusive to each other.. This diagnostic is emitted by the TypeScript compiler when named capturing groups with the same name must be mutually exclusive to each other..

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

TypeScript compiler reports TS1515 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1515
// Named capturing groups with the same name must be mutually exclusive to each other.

expected output

error TS1515: Named capturing groups with the same name must be mutually exclusive to each other.

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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