misc-utils-of-mine-generic/src/environment.ts

Miscellaneous utilities for JavaScript/TypeScript that I often use

declare var document: any, Node: any

export function isNode() {
  return (
    typeof process !== 'undefined' &&
    typeof global !== 'undefined' &&
    typeof process.exit === 'function' &&
    typeof module !== 'undefined' &&
    typeof require === 'function' &&
    typeof require('f' + 's') !== 'undefined' &&
    typeof require('f' + 's').writeFileSync === 'function' &&
    typeof require('child_' + 'pro' + 'cess') !== 'undefined' &&
    typeof require('child_' + 'pro' + 'cess').execSync === 'function'
  )
}

export function isJSDOM() {
  return isNode() && isDOM()
}

export const inNode = isNode

export function inBrowser() {
  // @ts-ignore
  return (
    typeof window !== 'undefined' &&
    typeof document !== 'undefined' &&
    typeof Node !== 'undefined' &&
    document.nodeType === Node.DOCUMENT_NODE
  )
}

export const isBrowser = inBrowser

export const inDOM = inBrowser

export const isDOM = inBrowser

export function isWebWorker() {
  // @ts-ignore
  return !isDOM() && !isNode() && typeof self !== 'undefined' && typeof self.onmessage !== 'undefined'
}

declare var self: any, window: any
//@ts-ignore
const _this = this
export function getGlobal(): any {
  // @ts-ignore
  return isWebWorker() ? self : isNode() ? global : isBrowser() ? window : _this
}