var state = {'veg': 'potato'}
//All Same
state = $.extend({}, state, {'fruit': 'apple'}) // jQuery
state = Object.assign({}, state, {'fruit': 'apple'}) // JS
state = { ...state, 'fruit': 'apple'} //ES6 Spread operator
Notice the above code it does the same thing. Spread operator is an easy to use syntax for object/array manipulation