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Forked from millermedeiros/gist:882682
Created March 18, 2014 16:58
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/*!
* RequireJS plugin for async dependency load like JSONP and Google Maps
* @author Miller Medeiros
* @version 0.0.1 (2011/03/23)
* Released under the MIT License <http://www.opensource.org/licenses/mit-license.php>
*/
define(function(){
function injectScript(src){
var s, t;
s = document.createElement('script'); s.type = 'text/javascript'; s.async = true; s.src = src;
t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(s,t);
}
function formatUrl(name, id){
var paramRegex = /!(.+)/,
url = name.replace(paramRegex, ''),
param = (paramRegex.test(name))? name.replace(/.+!/, '') : 'callback'; //default param name is 'callback'
url += (url.indexOf('?') < 0)? '?' : '&';
return url + param +'='+ id;
}
return{
load : function(name, req, onLoad, config){
if(config.isBuild){
onLoad(null); //avoid errors on the optimizer
}else{
var id = '__mm_asynch_req__'+ (+new Date());
window[id] = onLoad; //create a global variable that stores onLoad so callback function can define new module after async load
injectScript(formatUrl(name, id));
}
}
};
});
/*
* Google Maps Example using RequireJS Async plugin
* @author Miller Medeiros
* released under the WTFPL (http://sam.zoy.org/wtfpl/)
*/
//
// Google Maps loads many JS files asynchronously, so listening just to the first script load
// isn't enough to check if it is ready to be used, another problem is that the regular gmaps script
// uses document.write, so we need to pass a `callback` parameter to make it not use `document.write`
// and wait for the callback call.
// <http://code.google.com/apis/maps/documentation/javascript/basics.html#Async>
//
require(['async!http://maps.google.com/maps/api/js?sensor=false!callback'], function(){
//Google maps is available and all components are ready to use.
var mapDiv = document.getElementById('map-canvas');
var map = new google.maps.Map(mapDiv, {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP,
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.SMALL
}
});
});
/*
* RequireJS Async plugin + JSONP + custom callback name param
* @author Miller Medeiros
* released under the WTFPL (http://sam.zoy.org/wtfpl/)
*/
//
// load a JSONP file which expects an `awesomecallback` parameter to register callback function name
//
require(['async!my_jsonp_file.js!awesomecallback'], function(data){
console.log(data);
});
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