Function when

Helper to create stable code if a value can be a promise or a non async value.

Example

// use it as wrapper to get a promise
return when(thing).then((thing)=> doSomethingWithTheThing);
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Example

import when from "apprt-core/when";
// bind success and error handler from an object
var scope = {
    counter : 0,
    ok() {
        ++this.counter;
    },
    error() {
        --this.counter;
    }
};
return when(thing, scope.ok, scope.error, scope);
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Same as the first overload, but without an error callback.