Parameters Parametersextracts the parameter types of a function type as an array. Example type PointPrinter = (p: { x: number; y: number; }) =>void; constpoint: Parameters<PointPrinter>[0] = { x:10, y:20 }; Try it Yourself » ...
function(event,xhr,options,exc) Required. Specifies the function to run if the request fails Additional parameters: event - contains the event object xhr - contains the XMLHttpRequest object options - contains the options used in the AJAX request exc - contains the JavaScript exception, if one ...