test/data/ajax-jsonp-callback-name.html

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>jQuery Migrate test for re-using JSONP callback name with `dataType: "json"`</title>

	<!-- Load a jQuery and jquery-migrate plugin file based on URL -->
	<script src="testinit.js"></script>
	<script>
		TestManager.loadProject( "jquery", "git" );
	</script>
	<script src="iframeTest.js"></script>
	<script>
		jQuery.noConflict();
		TestManager.loadProject( "jquery-migrate", "dev", true );
	</script>
	<script>
		var thisCallbackInWindow1, thisCallbackInWindow2,
			previousCallback, previousJsonpCallback,
			nextJsonpCallback, error,
			requestSucceeded = true;

		jQuery.migrateEnablePatches( "jsonp-promotion" )

		jQuery.ajaxTransport( "script", function( options ) {
			if ( options.url.indexOf( 'fakeScript' ) === -1 ) {
				return;
			}
			return {
				abort: function () {},
				send: function ( headers, completeCallback ) {
					var script = options.jsonpCallback + "( { answer: 42 } )";
					setTimeout( function() {
						completeCallback( 200, 'OK', { text: script }, [] );
					} );
				}
			};
		} );

		jQuery.ajax( {
			url: "fakeScript1.js?callback=?",
			dataType: "json",
			beforeSend: function( jqXHR, s ) {
				s.callback = s.jsonpCallback;

				thisCallbackInWindow1 = this.callback in window;
			}
		} ).then( function() {
			var previous = this;

			previousJsonpCallback = previous.jsonpCallback;
			thisCallbackInWindow2 = this.callback in window;

			return jQuery.ajax( {
				url: "fakeScript2.js?callback=?",
				dataType: "json",
				beforeSend: function() {
					previousCallback = previous.callback;
					nextJsonpCallback = this.jsonpCallback;

					// Test cleanup
					delete window.customJsonpCallback;
				}
			} );
		} ).catch( function( _jqXHR, _textStatus, err ) {

			if ( !( err instanceof Error ) && _jqXHR instanceof Error ) {
				err = _jqXHR;
			}

			// Test cleanup in case of an error
			delete window.customJsonpCallback;
			requestSucceeded = false;
			error = err;
		} ).then( function() {
			startIframeTest(
				thisCallbackInWindow1, thisCallbackInWindow2,
				previousJsonpCallback, previousCallback,
				nextJsonpCallback, requestSucceeded, error
			);
		} );
	</script>
</head>
<body>
<p>jQuery Migrate test for re-using JSONP callback name</p>
</body>
</html>