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Set.prototype.has()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since julio de 2015.

El método has() retorna un booleano indicando si el elemento especificado existe en el objeto Set o no.

In this article

Sintaxis

mySet.has(value);

Parametros

valor

Requerido. El valor del cual se probará su presencia en el objeto Set.

Valor de retorno

Booleano

Retorna true si el elemento con el valor especificado existe en el objeto Set; de otra manera retorna false.

Ejemplos

Usando el método has

js
var mySet = new Set(); mySet.add("foo"); mySet.has("foo"); // retorna true mySet.has("bar"); // retorna false

Especificaciones

Specification
ECMAScript® 2027 Language Specification
# sec-set.prototype.has

Compatibilidad con navegadores

Enable JavaScript to view this browser compatibility table.

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  1. Objetos globales
  2. Set
  3. Constructor
    1. Set()
  4. Propiedades estáticas
    1. [Symbol.species]
  5. Métodos de instancia
    1. Set.prototype.add()
    2. Set.prototype.clear()
    3. Set.prototype.delete()
    4. difference()
    5. Set.prototype.entries()
    6. forEach()
    7. Set.prototype.has()
    8. intersection()
    9. isDisjointFrom()
    10. isSubsetOf()
    11. isSupersetOf()
    12. keys()
    13. symmetricDifference()
    14. union()
    15. Set.prototype.values()
    16. Set.prototype[@@iterator]()
  6. Propiedades de instancia
    1. Set.prototype.size
  7. Herencia
  8. Object/Function
  9. Métodos estáticos
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. [Symbol.hasInstance]()
  10. Propiedades estáticas
    1. Function.displayName
    2. Function.length
    3. Function.name
    4. prototype
    5. Function.prototype.arguments
    6. Function.caller
  11. Métodos de instancia
    1. Object.prototype.__defineGetter__()
    2. __defineSetter__()
    3. __lookupGetter__()
    4. __lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  12. Propiedades de instancia
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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