**The set of properties and methods available on an object. **
The term “interface” has a lot of meanings. From a modeling and software perspective, the term refers to a set of properties and methods available on an object. Many languages (such as Java or TypeScript) have dedicated syntax for declaring interfaces and semantics for using them.
Example from my PDW :
/**
* The `DataStore` interface is what you must implement when creating code to
* hook up a new database. It is what sits between the data store of choice and the PDW.
* It's designed to be as simple-to-implement as possible.
*
* The parameter sanitization & merge logic are handled by the PDW.
*
* It's *very much* a work in progress.
*/
export interface DataStore {
getDefs(params: SanitizedParams): DefLike[];
getEntries(params: SanitizedParams): EntryLike[];
getTags(params: SanitizedParams): TagLike[];
setDefs(defs: Def[]): Def[];
setEntries(entries: Entry[]): Entry[];
setTags(tagData: Tag[]): TagLike[];
query(params: QueryParams): QueryResponse;
getOverview(): DataStoreOverview;
connect?(...params: any): boolean;
/**
* The name of the connector, essentially. Examples: "Excel", "Firestore"
*/
serviceName: string;
/**
* A reference to the Personal Data Warehouse instance to
* which the storage connector is connected.
*/
pdw: PDW;
}Source
Mostly myself, but also I liked this:
What is the definition of “interface” in object oriented programming