My problem is quite simple.
I have a button that when clicked shows a popover.
The content of the popover is not static but depends on the response of an API.
I don't want to call that API in advance but when the button is clicked.
The property content of the popover accepts a function as input.
so I thought to call the API in it, but then I end up with the problem with asynchronous call
Here my code: https://jsfiddle.net/5x43tcja/
$('a').popover({
    content: function(){
        var result;
        fetch('https://jsonplaceholder.typicode.com/todos/1')
            .then(response => response.json())
            .then(function(json){
                result = json.title;
            });
        return result; //The result here is undefined. But what I want is "delectus aut autem" that comes from the API.
    }
});
I tried to use async/await but still, I didn't get the result that I want: https://jsfiddle.net/jmn7abqz/
async function getData(){
    var resultFetch = await fetch('https://jsonplaceholder.typicode.com/todos/1');
    console.log("resultFetch", resultFetch);
    return resultFetch;
}
$('a').popover({
    content: function(){
        var result = getData();
        return result;
    }
});
How can I do?
Note
I'm using Bootstrap v3.3.7

 
     
    