JS: Difference, Object vs Map

Difference Between Object vs Map

• Map Object's keys can be any type. Object's keys can be only string or Symbol.
• The key/value pairs in map object are not properties. You don't have to worry about getting property key from parent object, or if a property is not Enumerable. 〔see Access Property〕
• Map object is designed to be used as a dictionary data structure (aka hash table). For example, there is a “size” property to let you find number of entries, and there are proper methods to iterate thru the entries.