ECMAScript的内置对象
JavaScript 中有很多内置对象，它们可以直接在
TypeScript中当做定义好了的类型。
Boolean、Number、string、RegExp、Date、Error
constregexp:Regexp=/\w\d\s///声明正则
constdate:Date=newDate()//对象类型
//const date:Date = new Date().getTime() number类型
consterror:Error('错误')
总结
letb: Boolean=newBoolean(1)
console.log(b)
letn: Number=newNumber(true)
console.log(n)
lets: String=newString('小满今天穿白丝')
console.log(s)
letd: Date=newDate()
console.log(d)
letr: RegExp=/^1/
console.log(r)
lete: Error=newError("error!")
console.log(e)
DOM 和 BOM 的内置对象
Document、HTMLElement、Event、NodeList等
constlist:NodeList=document.querySelectorAll('#list li')
console.log(list)
//NodeList 实例对象是一个类似数组的对象，它的成员是节点对象。Node.childNodes、document.querySelectorAll () 返回的都是 NodeList 实例对象。 [1] NodeList 对象代表一个有序的节点列表。
constbody:HTMLElement=document.body
console.log(body)
constdiv:HTMLDivElement=document.querySelector('div')
console.log(div)
document.body.addEventListener('click',(e:MouseEvent)=>{
console.log(e)
})
//promise
functionpromise():Promise<number>{//Promise是类型,number是泛型
returnnewPromise<number>(resolve,rejuct)=>{
resolve(1)//如果不进行断言的话会报错
}
}
promise().then(res=>{
console.log(res)//返回1，这里会提示你res应该输入number类型
})
letbody: HTMLElement=document.body;
letallDiv: NodeList=document.querySelectorAll('div');
//读取div 这种需要类型断言 或者加个判断应为读不到返回null
letdiv:HTMLElement=document.querySelector('div') asHTMLDivElement
document.addEventListener('click', function (e: MouseEvent) {
});
//dom元素的映射表
interfaceHTMLElementTagNameMap {
"a": HTMLAnchorElement;
"abbr": HTMLElement;
"address": HTMLElement;
"applet": HTMLAppletElement;
"area": HTMLAreaElement;
"article": HTMLElement;
"aside": HTMLElement;
"audio": HTMLAudioElement;
"b": HTMLElement;
"base": HTMLBaseElement;
"bdi": HTMLElement;
"bdo": HTMLElement;
"blockquote": HTMLQuoteElement;
"body": HTMLBodyElement;
"br": HTMLBRElement;
"button": HTMLButtonElement;
"canvas": HTMLCanvasElement;
"caption": HTMLTableCaptionElement;
"cite": HTMLElement;
"code": HTMLElement;
"col": HTMLTableColElement;
"colgroup": HTMLTableColElement;
"data": HTMLDataElement;
"datalist": HTMLDataListElement;
"dd": HTMLElement;
"del": HTMLModElement;
"details": HTMLDetailsElement;
"dfn": HTMLElement;
"dialog": HTMLDialogElement;
"dir": HTMLDirectoryElement;
"div": HTMLDivElement;
"dl": HTMLDListElement;
"dt": HTMLElement;
"em": HTMLElement;
"embed": HTMLEmbedElement;
"fieldset": HTMLFieldSetElement;
"figcaption": HTMLElement;
"figure": HTMLElement;
"font": HTMLFontElement;
"footer": HTMLElement;
"form": HTMLFormElement;
"frame": HTMLFrameElement;
"frameset": HTMLFrameSetElement;
"h1": HTMLHeadingElement;
"h2": HTMLHeadingElement;
"h3": HTMLHeadingElement;
"h4": HTMLHeadingElement;
"h5": HTMLHeadingElement;
"h6": HTMLHeadingElement;
"head": HTMLHeadElement;
"header": HTMLElement;
"hgroup": HTMLElement;
"hr": HTMLHRElement;
"html": HTMLHtmlElement;
"i": HTMLElement;
"iframe": HTMLIFrameElement;
"img": HTMLImageElement;
"input": HTMLInputElement;
"ins": HTMLModElement;
"kbd": HTMLElement;
"label": HTMLLabelElement;
"legend": HTMLLegendElement;
"li": HTMLLIElement;
"link": HTMLLinkElement;
"main": HTMLElement;
"map": HTMLMapElement;
"mark": HTMLElement;
"marquee": HTMLMarqueeElement;
"menu": HTMLMenuElement;
"meta": HTMLMetaElement;
"meter": HTMLMeterElement;
"nav": HTMLElement;
"noscript": HTMLElement;
"object": HTMLObjectElement;
"ol": HTMLOListElement;
"optgroup": HTMLOptGroupElement;
"option": HTMLOptionElement;
"output": HTMLOutputElement;
"p": HTMLParagraphElement;
"param": HTMLParamElement;
"picture": HTMLPictureElement;
"pre": HTMLPreElement;
"progress": HTMLProgressElement;
"q": HTMLQuoteElement;
"rp": HTMLElement;
"rt": HTMLElement;
"ruby": HTMLElement;
"s": HTMLElement;
"samp": HTMLElement;
"script": HTMLScriptElement;
"section": HTMLElement;
"select": HTMLSelectElement;
"slot": HTMLSlotElement;
"small": HTMLElement;
"source": HTMLSourceElement;
"span": HTMLSpanElement;
"strong": HTMLElement;
"style": HTMLStyleElement;
"sub": HTMLElement;
"summary": HTMLElement;
"sup": HTMLElement;
"table": HTMLTableElement;
"tbody": HTMLTableSectionElement;
"td": HTMLTableDataCellElement;
"template": HTMLTemplateElement;
"textarea": HTMLTextAreaElement;
"tfoot": HTMLTableSectionElement;
"th": HTMLTableHeaderCellElement;
"thead": HTMLTableSectionElement;
"time": HTMLTimeElement;
"title": HTMLTitleElement;
"tr": HTMLTableRowElement;
"track": HTMLTrackElement;
"u": HTMLElement;
"ul": HTMLUListElement;
"var": HTMLElement;
"video": HTMLVideoElement;
"wbr": HTMLElement;
}
