basic-loader

David Walsh's super simple loader for loading image, CSS, and JavaScript files.

installation

npm i -S @prepair/basic-loader

• Requires browser environment (dom).
• Transpiled to es2015+ie context (polyfills not included).

usage

import load from '@prepair/basic-loader'

Promise.all([
  load.js('lib/highlighter.js'),
  load.js('lib/main.js'),
  load.css('lib/highlighter.css'),
  load.img('images/logo.png')
]).then(() => {
  console.log('Everything has loaded!');
}).catch(err => {
  console.log('Oh no, epic failure!');
});

add optional attributes

load.js('lib/main.js', {
  'data-foo': 'new-attribute',
  'data-bar': 'new-attribute-2'
})

caveats

• Loading is not sequential of course. In the above example "main.js" may be parsed before "highlighter.js". If you want in order loading, use a sequential promise executor or a then chain.
• Style loading may not work with very old mobile borwsers. Followup is here, see addendum below.
• The e2e test runner breaks (in phantom, but the test.html works in the browser) this is caused by an old phantomjs version in the mocha-phantomjs package. Issue is here. Solutions:
  • either wait for the upstream package to be updated
  • or update the binary manually (inside node_modules)

exposed test

Temporarily the e2e standalone test page has been exposed to docs and is made available as a github page. TODO: use browserstack or smg similar?

• Chrome/30 Mobile Safari/537.6 (android 4.4.2), from 2013
• iOS 10.2.1 (vanilla iphone 6)
• Firefox 51.0.3 (android 4.4.2)