JSFiddle - React, Tailwind, and code Playground

JavaScript

function funcOne(){
    return null;
}
function funcTwo(){
    return null;
}
function funcThree(){
    return null;
}
var functionArray=[funcOne,funcTwo,funcThree];
var output=new Array();
for(var funcName in functionArray){
    output.push(functionArray[funcName].name);
}
alert(output.join(","));