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