loadBlob(url, headers, request)Promise.<Blob>|undefined

Asynchronously loads the given URL as a blob. Returns a promise that will resolve to a Blob once loaded, or reject if the URL failed to load. The data is loaded using XMLHttpRequest, which means that in order to make requests to another origin, the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
Name Type Description
url String The URL of the data.
headers Object optional HTTP headers to send with the requests.
request Request optional The request object. Intended for internal use only.
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
// load a single URL asynchronously
Cesium.loadBlob('some/url').then(function(blob) {
    // use the data
}).otherwise(function(error) {
    // an error occurred