typescript keyof
interface Person {
name: string;
age: number;
location: string;
}
type K1 = keyof Person; // "name" | "age" | "location"
type K2 = keyof Person[]; // "length" | "push" | "pop" | "concat" | ...
type K3 = keyof { [x: string]: Person }; // stringtypeof javascript
var miFuncion = new Function("5+2")
var forma = "redonda"
var tamano = 1
var hoy = new Date()
typeof miFuncion === 'function'
typeof forma === 'string'
typeof tamano === 'number'
typeof hoy === 'object'
typeof noExiste === 'undefined'Copyright © 2021 Codeinu
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