connection-middleware
v0.1.0
Published
A node HTTP middleware for adding a chunk of JS and a meta tag to determine the connection abilities of the end-user.
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connection-middleware
Get connection rules based on document download time.
Web performance is an important aspect of caring for the end-user. It is important to have your application progressively enhance based on the connection abilities of your end-user. Connection middleware returns an HTML document with an IIFE that will get a rough guess at the connection speed and assign content rules to the window. In addition, the completion of the function will fire a siteready event.
Install
$ yarn add connection-middlewareUsage
const polka = require('polka');
const connectionMiddleware = require('connection-middleware');
const someHtml = require('./some/html');
polka()
.use(connectionMiddleware())
.get('/', (req, res) => {
res.render(someHtml);
})
.listen(8080);API
connectionMiddleware([options])
Returns a Node middleware function which assigns a render method to the response interface.
options
ads
Type: '3g' | true
Default: false
Ads suck, especially when they are driven by 3rd-parties. By default ads are turned off on all connection types, with the lowest connection type that will allow addes being 3G.
When true, only 4G will allow ads to load.
adTracking
Type: '3g' | true
Default false
Letting ad companies float random trackers around your site is border-line irresponsible, but if you insist, we'll only let you do that on 3G and 4G. The lowest connection type that will allow ad-tracking is 3G, with 4G being the default when true.
analytics
Type: '2g' | '3g' | '4g' | false
Default: 3g & 4g true; et al false
Analytics can be super useful (though I highly recommend something like Simple Analytics because letting an ad company do all your analytics seems like a really bad idea). So we allow them as low as 2G, but use them wisely. If you're doing anything beyond basic page visit tracking I recommend lumping that in with adTracking.
hdVideo
Type: boolean
Default: true
HD Video's are sweet, but we only allow them at 4G, for obvious reasons. If you think it's better for your users to not pull HD content, or your video content isn't super important, you can disable it.
js
Type: boolean
JavaScript is awesome, but it can readily bloat your site and harm your user all in an effort to make a developer's life a little bit easier. If you want to use the same content code in multiple contexts (like text.npr.org) you may want to disable all JavaScript.
render(html)
An HTML document that includes at least a valid <head> section and a valid <body> section.
Window.serverConnection
When the page loads the IIFE will fire, assigning server connection settings to the window based on the browser connection and the options you provided to the server.
Slow 2G
{
ads: false,
audio: false,
css: false,
img: false,
js: false,
tracking: false,
video: false,
}2G
{
ads: false,
audio: false,
css: {
type: 'enhanced'
},
img: {
resolution: 'sd',
fileTypes: ['lossy'],
},
js: {
type: 'enhanced',
},
tracking: {
analytics: true,
ads: false,
},
video: false,
}3G
{
ads: false,
css: {
type: 'enhanced'
},
img: {
resolution: 'hd',
fileTypes: ['lossy', 'lossless', 'animated'],
},
js: {
type: 'app',
},
tracking: {
analytics: true,
ads: false,
},
video: {
resolution: 'sd'
},
}4G
{
ads: false,
css: {
type: 'app'
},
img: {
resolution: 'hd',
fileTypes: ['lossy', 'lossless', 'animated'],
},
js: {
type: 'app',
},
tracking: {
analytics: true,
ads: false,
},
video: {
resolution: 'hd'
},
}