Use a variable as an object key code example

Example 1: variable key name js

//You need to make the object first, then use [] to set it.

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

Example 2: javascript variable as object key

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