create 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 object string property

// Also useful for dynamic strings, e.g. `thing-${variable}`
myObject['thing'] = true;