相关疑难解决方法(0)

在spec.ts例如:Dom.spec.ts

  describe('matchesSelector', () => {
    let result: boolean;
    let matchelement: HTMLElement;
it('Matches for the opera browser', () => {
        matchelement.matches = matchelement.msMatchesSelector = null;
        result = Dom.matches(matchelement, '#match');
        expect(result).toBe(true);
    });

在上面的代码中调用matchelement.msMatchesSelector中的msmatchesSelector时,它会在lib.dom.ts中获取specfic类型.当我将打字稿版本升级到3.0时,它会重现以下错误

spec\dom.spec.ts(304,49): error TS2339: Property 'msMatchesSelector' does not exist on type 'HTMLElement'.

但它在我以前的打字稿版本2.6.2中工作正常