xmlhttp

is-ready

A tiny (309B) library to detect when window globals are defined and ready to use~!

This module exposes three module definitions:

• ES Module: dist/is-ready.es.js
• CommonJS: dist/is-ready.js
• UMD: dist/is-ready.min.js

If using the UMD bundle, the library is exposed as is-ready globally.

Install

$ npm install --save is-ready

Usage

const isReady = require('is-ready');

// Check if "window.firebase" is loaded
isReady('firebase').then(_ => {
  firebase.initializeApp(...);
});

// Check if "window.firebase" & "window.firebase.auth" are loaded
isReady(['firebase', 'firebase.auth']).then(_ => {
  firebase.auth().onAuthStateChanged(...);
});

// This is equivalent (but requires dependency/hierarchy knowledge)
isReady('firebase').then(_ => {
  //=> ready: window.firebase
  isReady('firebase.auth').then(_ => {
    //=> ready: window.firebase.auth
  });
});

API

isReady(name)

Returns: Promise

name

Type: String or Array

The global variable name(s) to check. These are the would-be variable(s) mounted to window once loaded. For example, if you know a library will be accesible as window.foobar, then you would use isReady('foobar').

Any nested or sub-module names should be delimited with a .; eg firebase.auth. See dlv for more info on dot-notation access.

License

MIT © Luke Edwards