DOM 和 BOM 内置对象

let body: HTMLElement = document.body
let allDiv: 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
let div: HTMLElement = document.querySelector("div") as HTMLDivElement
document.addEventListener("click", function (e: MouseEvent) {})
//dom元素的映射表
interface HTMLElementTagNameMap {
	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
}