how to make a variable a object key in js code example

Example 1: javascript create object key from variable

//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";

Example 2: javascript variable as object key

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