41 lines
644 B
TypeScript
41 lines
644 B
TypeScript
interface Thing1 {
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a: number;
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self(): this;
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}
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interface Thing2 {
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b: number;
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me(): this;
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}
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type Thing3 = Thing1 & Thing2;
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type Thing4 = Thing3 & string[];
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function f1(t: Thing3) {
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t = t.self();
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t = t.me().self().me();
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}
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interface Thing5 extends Thing4 {
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c: string;
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}
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function f2(t: Thing5) {
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t = t.self();
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t = t.me().self().me();
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}
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interface Component {
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extend<T>(props: T): this & T;
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}
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interface Label extends Component {
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title: string;
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}
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function test(label: Label) {
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const extended = label.extend({ id: 67 }).extend({ tag: "hello" });
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extended.id; // Ok
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extended.tag; // Ok
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}
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