JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = {};
var key = 'showItemA';
obj[key] = true;

var switchToggle = function (toggleTarget) {
    obj[toggleTarget] = !obj[toggleTarget];
    // Do other stuff
    console.log(obj[toggleTarget]);
    //false
};

switchToggle(key);
console.log(obj[key]);
//false