fetchJson
Asynchronously loads the given resource as JSON. Returns a promise that will resolve to a JSON object once loaded, or reject if the resource 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. This function adds 'Accept: application/json,*/*;q=0.01' to the request headers, if not already specified.
resource.fetchJson().then(function(jsonData) {
// Do something with the JSON object
}).catch(function(error) {
// an error occurred
});Content copied to clipboard
Return
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.