javascript set object key by variable

                                    let variableKey = "exampleKey"
let variableValue = "exampleValue"
//Add brackets around variableKey
let data = {
	[variableKey] : variableValue
}

console.log(data)
//Return {"exampleKey": "exampleValue"}

                                    /* FOR ES6 and Babel */
{
    [yourKeyVariable]: someValueArray,
}  

//for older versions

var key = "happyCount";
var obj = {};
obj[key] = someValueArray;
myArray.push(obj);

                                    var object = { boo:true, baa:5 };
console.log(object);
function change() {
  object.boo = false;
  object.baa++;
};
change();
console.log(object);
//Hope this helps!

                                    //For ES6 and Babel
{
    [yourKeyVariable]: "yourValue",
}

// ES5 Alternative
// Create the object first, then use [] to set your variable as a key
var yourObject = {};

yourObject[yourKeyVariable] = "yourValue";