JAVASCRIPT

javascript check if object is null or empty

obj && Object.keys(obj).length === 0 && obj.constructor === Object

check object is null empty or undefined

function isRealValue(obj)
{
 return obj && obj !== 'null' && obj !== 'undefined';
}

//Use isRealValue(obj) to check further, will always return truthy object.

javascript check if object is null or empty

if (typeof value !== 'undefined' && value) {
    //deal with value'
};

object check null or empty

Object.entries(obj).length === 0 && obj.constructor === Object

object empty or undefined

return value == null; // also returns true if value is undefined