JSFiddle - React, Tailwind, and code Playground

JavaScript

function anyFunc(par)
    {
        console.log(par);
        console.log(this);
    }
    
    function makeClosure(func)
    {
        console.log(this);
        return function(par)
        {
            return func(par);
        }
    }
    var objWithClosure = {cls:makeClosure(anyFunc),prop:'foobar'};
    objWithClosure.cls(objWithClosure.prop);

    var scndObj = {prop:'Foobar2'};
    scndObj.cls = makeClosure;
    scndObj.cls = scndObj.cls(anyFunc);
    scndObj.cls(scndObj.prop);