get keys objet javascript

var foo = {
  'alpha': 'puffin',
  'beta': 'beagle'
};

var keys = Object.keys(foo);
console.log(keys) // ['alpha', 'beta'] 
// (or maybe some other order, keys are unordered).

function getKeyByValue(object, value) { 
    return Object.keys(object).find(key => object[key] === value); 
} 

myObject = {
	"key": "value"
}

Object.keys(myObject); // get array of keys

var buttons = {
  foo: 'bar',
  fiz: 'buz'
};

for ( var property in buttons ) {
  console.log( property ); // Outputs: foo, fiz or fiz, foo
}