TSX's render function doesn't fail when generic component is without generic type

[sztrzask]

TypeScript Version: 3.0.1

Search Terms: TSX, generics, required, jsx, typescript
I also read the jsx section in documentation.

Code

.tsx

import * as React from "react";

class Generics<T> extends React.Component {
  render() {
    return <span>Generics is rendered even though it's T is not defined</span>;
  }
}

export default () => (
  <h1>
    This should fail as Generics does not have a default type. <Generics />
  </h1>
);

Expected behavior:
The above code should fail during compilation.

Actual behavior:
The above code passes the compilation, even though the generic type is not provided and not defaulted

Playground Link:
https://codesandbox.io/s/4q15l927x

Related Issues:
#3960

[ajafff]

Type parameters that cannot be inferred and don't have a default, fall back to {}.
There once was a PR to add an option to make this behavior an error. But that PR was rejected and it was decided this should be implemented in a linter instead.

And that's what I did. I implemented it as no-inferred-empty-object for my linter runtime Fimbullinter. Click here for detailed documentation about CLI usage, configuration and more.

Note that TSLint has a rule called no-inferred-empty-object-type. But that one doesn't actually work and doesn't check JSX.

[typescript-bot]

This issue has been marked 'Working as Intended' and has seen no recent activity. It has been automatically closed for house-keeping purposes.