is-async

Simple library for guessing if a function is async

is-async

A simple method to guess whether or not a given method is asynchronous.

npm install is-async
var isAsync = require('is-async');
 
function foo(barcallback) {
    callback(bar*2);
}
 
isAsync(foo, 2); // Returns true, isAsync was told a function with two arguments is probably true 
 
function forceAsync(barbazcallback) {
    callback(bar*baz);
}
 
forceAsync.async = true; // Adding an ``async`` property to the function 
 
isAsync(forceAsync); // Returns true, the ``async`` property takes precedence 
 
function forceSync(barbaz) {
    return bar*baz;
}
 
forceSync.sync = true; // Similar override property 
 
isAsync(forceSync, 2); // Returns false, even though its considered "probably async" because of the ``sync`` property. 

Copyright (C) 2012-2013 by David Ellis

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

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