What is type of key?

What is the type of key in JavaScript?

Keys in javascript objects can be strings and symbols. symbol is a primitive data type in javascript.

What type is an object key?

Against what many think, JavaScript object keys cannot be Number, Boolean, Null, or Undefined type values. Object keys can only be strings, and even though a developer can use other data types to set an object key, JavaScript automatically converts keys to a string a value.

What is key of in TypeScript?

The keyof type operator The keyof operator takes an object type and produces a string or numeric literal union of its keys. The following type P is the same type as “x” | “y”: type Point = { x : number; y : number }; type P = keyof Point ; type P = keyof Point.

What is key string?

KeyString ( _KeyCode_ , _KeyCode2_ ) expression A variable that represents an Application object.