[non-nullable-type-assertion-style] false positive when using type assertion to specify type #2887
Description
- I have tried restarting my IDE and the issue persists.
- I have updated to the latest version of the packages.
- I have read the FAQ and my problem is not listed.
Repro
{
"rules": {
"@typescript-eslint/non-nullable-type-assertion-style": "error"
}
}function inject<T>(key: string): T | undefined {
// ...
}
// Of course, I can write it to `const str = inject<string>('myString')!`, but still seems a bug.
// Autofix will fix it to `const str = inject('myString')!`, and might break type check.
const str = inject('myString') as stringtsconfig
{
"compilerOptions": {
"target": "esnext",
"lib": ["esnext"],
"skipLibCheck": true,
"esModuleInterop": true,
"strict": true,
"forceConsistentCasingInFileNames": true,
"module": "esnext",
"moduleResolution": "node",
"resolveJsonModule": true,
"noFallthroughCasesInSwitch": true,
"noUnusedLocals": true,
"noUnusedParameters": true
}
}Expected Result
No error.
Actual Result
Use a ! assertion to more succintly remove null and undefined from the type.
Additional Info
Versions
| package | version |
|---|---|
@typescript-eslint/eslint-plugin |
4.10.0 |
@typescript-eslint/parser |
4.10.0 |
TypeScript |
4.1.3 |
ESLint |
7.15.0 |
node |
15.4.0 |