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makeAjaxRequest: throw error for missing callback

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Chris Adams 2013-06-27 16:02:17 -04:00
parent 1c6a57c710
commit db38b71dd9
1 changed files with 4 additions and 0 deletions
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src/openseadragon.js
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@ -1313,6 +1313,10 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
makeAjaxRequest: function( url, onSuccess, onError ) { makeAjaxRequest: function( url, onSuccess, onError ) {
var request = $.createAjaxRequest(); var request = $.createAjaxRequest();
if (!$.isFunction(onSuccess)) {
throw new Error( "makeAjaxRequest requires a success callback" );
}
request.onreadystatechange = function() { request.onreadystatechange = function() {
// 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties) // 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties)
if ( request.readyState == 4 ) { if ( request.readyState == 4 ) {