Introduced in TypeScript 4.2, this is a game-changer for diagnosing complex module resolution.
You can use the --extendedDiagnostics flag to get a detailed performance report on the compiler itself, which helps diagnose why your build is taking 30 seconds. tsc diagnostic tool
tsc --noEmit
– A memory vendor claimed DIMMs passed all tests, but TSC tool’s “dampened pattern” test (alternating 0x55/0xAA) exposed signal integrity issues at high temperature → memory vendor revised their PCB layout. Introduced in TypeScript 4
Next time you see that red text in your terminal, don’t just patch the code. Run a diagnostic. Find out why the error happened, and your future self will thank you. Introduced in TypeScript 4.2