Encapsulation - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

Encapsulation is the packing of data and functions into one component (for example, a class) and then controlling access to that component to make a "blackbox" out of the object. Because of this, a user of that class only needs to know its interface (that is, the data and functions exposed outside the class), not the hidden implementation.

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General knowledge

• Encapsulation on Wikipedia