취준/Node.js

[JS] Property accessors(.), Spread syntax(...), Optional chaning(?.)

Kawaii_Jordy 2021. 11. 22. 06:36

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors

 

Property accessors - JavaScript | MDN

Property accessors provide access to an object's properties by using the dot notation or the bracket notation.

developer.mozilla.org

 

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors

 

Property accessors - JavaScript | MDN

Property accessors provide access to an object's properties by using the dot notation or the bracket notation.

developer.mozilla.org

 

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

 

Optional chaining (?.) - JavaScript | MDN

The optional chaining operator (?.) enables you to read the value of a property located deep within a chain of connected objects without having to check that each reference in the chain is valid.

developer.mozilla.org