module Validation{ export interface StringValidator { isAcceptable(s:string):boolean; } var lettersRegexp = /^[A-Za-z]+$/; var numberRegexp = /^[0-9]+$/; export class LettersValidator implements StringValidator{ isAcceptable(s:string):boolean{ return lettersRegexp.test(s); } } export class ZipCodeValidator implements StringValidator{ isAcceptable(s:string):boolean{ return s.length === 5 && numberRegexp.test(s); } } } module Time{ export class Test{ element:HTMLElement; span:HTMLElement; timer:number; constructor(e:HTMLElement){ this.element = e; this.element.innerHTML = "现在时间是："; this.span = document.createElement("span"); this.element.appendChild(this.span); this.span.innerHTML = new Date().toTimeString(); } start(){ this.timer = setInterval(()=>this.span.innerHTML = new Date().toTimeString(), 500); } stop(){ // clearTimeout(this.timer); clearInterval(this.timer); } } }