TypeScript/tests/cases/compiler/jsxComponentTypeErrors.tsx
uhyo 1f56ab02f0
Improve error message for invalid return type of JSX component (#32702)
* New diagnostic message for wrong JSX function component

* Component and Mixed type

* fix existing tests

* add new test for JSX component return type error

* fix tslint error

* update diagnostic message to include component name

* accept baseline

* update tests

* missing semicolon

* accept baseline

Co-authored-by: Wesley Wigham <wwigham@gmail.com>
2020-03-30 13:04:33 -07:00

41 lines
816 B
TypeScript

// @strict: true
// @jsx: preserve
namespace JSX {
export interface Element {
type: 'element';
}
export interface ElementClass {
type: 'element-class';
}
}
function FunctionComponent<T extends string>({type}: {type?: T}) {
return {
type
}
}
FunctionComponent.useThis = function() {
return <this type="foo" />;
}
class ClassComponent {
type = 'string';
}
const MixedComponent = Math.random() ? FunctionComponent : ClassComponent;
const elem1 = <FunctionComponent type="abc" />;
const elem2 = <FunctionComponent<"abc"> />;
const elem3 = <ClassComponent />;
const elem4 = <MixedComponent />;
const obj = {
MemberFunctionComponent() {
return {};
},
MemberClassComponent: class {},
};
const elem5 = <obj.MemberFunctionComponent />;
const elem6 = <obj. MemberClassComponent />;