56 lines
1.3 KiB
TypeScript
56 lines
1.3 KiB
TypeScript
// @noImplicitAny: true
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// @noImplicitThis: true
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interface IndexedWithThis {
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// this is a workaround for React
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init?: (this: this) => void;
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willDestroy?: (this: any) => void;
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[propName: string]: number | string | boolean | symbol | undefined | null | {} | ((this: any, ...args:any[]) => any);
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}
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interface IndexedWithoutThis {
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// this is what React would like to write (and what they write today)
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init?: () => void;
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willDestroy?: () => void;
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[propName: string]: any;
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}
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interface SimpleInterface {
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foo(n: string);
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bar(): number;
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}
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declare function extend1(args: IndexedWithThis): void;
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declare function extend2(args: IndexedWithoutThis): void;
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declare function simple(arg: SimpleInterface): void;
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extend1({
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init() {
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this // this: IndexedWithThis because of contextual typing.
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// this.mine
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this.willDestroy
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},
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mine: 12,
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foo() {
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this.url; // this: any because 'foo' matches the string indexer
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this.willDestroy;
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}
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});
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extend2({
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init() {
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this // this: containing object literal type
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this.mine
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},
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mine: 13,
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foo() {
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this // this: containing object literal type
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this.mine
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}
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});
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simple({
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foo(n) {
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return n.length + this.bar();
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},
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bar() {
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return 14;
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}
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})
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