load-script-once

Loads a script only once, calls back when ready multiple times. Like segmentio/load-script, but loads a script once per url, and doesn't load the script again if it is already on the page.

Installation

Install with component(1):

$ component install segmentio/load-script-once

Example

var load = require('load-script-once');

load('//www.google-analytics.com/ga.js');

Loads in the Google Analytics library (assuming it isn't already on the page)

var load = require('load-script-once');

load({
  http  : 'http://www.google-analytics.com/ga.js',
  https : 'https://ssl.google-analytics.com/ga.js'
});

Loads in the right URL depending on the protocol.

API

loadScriptOnce(src || options, callback)

Load the given script either by passing a src string, or an options object:

{
    src: '//example.com/lib.js', // same as `src` string
    http: 'http://example.com/lib.js', // `src` to load if the protocol is `http:`
    https: 'https://ssl.example.com/lib.js' // `src` to load if the protocol is `https:`
}

You can also pass in a callback that will be called when the script loads with err, event.

License

MIT