docsify/src/core/index.js

import { initMixin } from './init'
import { routerMixin } from './router'
import { renderMixin } from './render'
import { fetchMixin } from './fetch'
import { eventMixin } from './event'
import initGlobalAPI from './global-api'

/**
 * Fork https://github.com/bendrucker/document-ready/blob/master/index.js
 * @param {Function} callback The callbacack to be called when the page is loaded
 * @returns {Number|void} If the page is already laoded returns the result of the setTimeout callback,
 *  otherwise it only attaches the callback to the DOMContentLoaded event
 */
function ready(callback) {
  const state = document.readyState

  if (state === 'complete' || state === 'interactive') {
    return setTimeout(callback, 0)
  }

  document.addEventListener('DOMContentLoaded', callback)
}

function Docsify() {
  this._init()
}

const proto = Docsify.prototype

initMixin(proto)
routerMixin(proto)
renderMixin(proto)
fetchMixin(proto)
eventMixin(proto)

/**
 * Global API
 */
initGlobalAPI()

/**
 * Run Docsify
 */
ready(_ => new Docsify())