22 lines
679 B
TypeScript
22 lines
679 B
TypeScript
class Base { foo() { } }
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class Derived1 extends Base { bar() { } }
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class Derived2 extends Base { baz() { } }
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class Derived3 extends Base { biz() { } }
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interface MyDoc { // Document
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createElement(tagName: string): Base;
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createElement(tagName: 'canvas'): Derived1;
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createElement(tagName: 'div'): Derived2;
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createElement(tagName: 'span'): Derived3;
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// + 100 more
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}
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class D implements MyDoc {
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createElement(tagName:string): Base;
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createElement(tagName: 'canvas'): Derived1;
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createElement(tagName: 'div'): Derived2;
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createElement(tagName: 'span'): Derived3;
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createElement(tagName:any): Base {
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return null;
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}
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} |