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内置对象

ECMAScript 内置对象​

Boolean、Number、String、RegExp、Date、Error

let a: Boolean = new Boolean(1)
let b: String = new String('olu')
let c: Number = new Number(1)
let d: Date = new Date()
let e: RegExp = /^1/
let f: Error = new Error('error~')

DOM 和 BOM 内置对象​

DOM​

const body:HTMLElement = document.body
const list:NodeList = document.querySelectorAll('li')

BOM​

document.body.addEventListener('click', (e: MouseEvent): void => {
  // cool things
})

一些其他 TypeScript 核心库定义文件​

Promise​

function promise (): Promise<number> {
  return new Promise<number>((resolve, reject): void => {
    resolve(1)
  })
}