Yes, we can call an external REST API from custom widget. I have done in my custom widget.
For Example the code looks like as below.
FetchData: function () {
var apiUrl = "https://myservername/myApiname/MyMethodName";
var resultDataItems;
$.ajax({
async: false,
type: "GET",
url: apiUrl,
data: {"strParams": strParams},
success: function (result){
resultDataItems = JSON.parse(result);
}
});
}
Now you can bind the result in whatever display component you need in your application , for example Gridview, ListView...
Additionally Add the jquery.min library in your libs folder and reference that in index page.
