N/util Module
util.isAsyncFunction(obj)
Method Description: Returns true if the obj parameter is a JavaScript AsyncFunction and false otherwise.
Returns: boolean
Supported Script Types: All script types For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/util Module
Since: 2020.1
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=util.isAsyncFunction(obj)

// Code Example 1

//Add additional code

//...

function func1(){

    var x = 1;

}

var func2 = function(){};

    async function async1(){

    var x = 2;

}

var async2 = async function(){};



util.isAsyncFunction(func1));  // returns false

util.isAsyncFunction(func2));  // returns false

util.isAsyncFunction(async1)); // returns true

util.isAsyncFunction(async2)); // returns true

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_159485198809.html