Avoid preflight OPTIONS conflicts when attempting to POST with a CORS XHR in Mithril. This only solves the use case of simple POST attempts with web clients other than Safari (which sets custom headers on CORS POST requests): it will not work for situations in which any custom headers are added to the request – in these cases an OPTIONS prefligh…

m.cors.js

m.cors = 'FormData' in window ? function( request ){
	var input = request.data;
	
	if( input ){
		delete request.data;
	}
	else {
		return m.request( request );
	}
	
	request.serialize = function(){
		var formData = new FormData();
		
		for( var key in input ){
			formData.append( key, input[ key ] );
		}
		
		return formData;
	}
	
	return m.request( request );
} : m.request;