TS1358
TypeScriptERRORNotableSyntaxHIGH confidence
Tagged template expressions are not permitted in an optional chain.
Production Risk
Build will fail; resolve before shipping.
What this means
A syntax error (TS1358): Tagged template expressions are not permitted in an optional chain.. This diagnostic is emitted by the TypeScript compiler when tagged template expressions are not permitted in an optional chain..
Why it happens
- 1Incorrect TypeScript syntax or type usage
- 2Type mismatch between declared and actual value
How to reproduce
TypeScript compiler reports TS1358 during type checking.
trigger — this will error
trigger — this will error
// Triggers TS1358 // Tagged template expressions are not permitted in an optional chain.
expected output
error TS1358: Tagged template expressions are not permitted in an optional chain.
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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