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Enhances 'require' from RequireJS with Promises API while preserving its original semantics. Now 'require' calls can be chained.

View promisify_require.js
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/*
* Enhances 'require' from RequireJS with Promises API while preserving its original semantics.
*/
 
(function() {
 
if (!Promise || !require) {
return;
}
 
var originalRequire = require;
 
function toArray(elems) {
return [].slice.call(elems);
}
 
req = require = function(deps, callback, errback, optional) {
return new Promise(function(resolve, reject) {
originalRequire(deps,
function() {
callback && callback.apply(null, toArray(arguments));
resolve(toArray(arguments));
},
function() {
errback && errback.apply(null, toArray(arguments));
reject(toArray(arguments));
},
optional
);
});
};
 
require.config = function() {
originalRequire.config.apply(originalRequire, toArray(arguments));
};
})();
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