JS: Object.prototype.propertyIsEnumerable

By Xah Lee. Date: . Last updated: .

obj.propertyIsEnumerable ( key )

Return true if value key is a own property key of the object obj and that property has enumerable attribute value of true. Else, false.

// check if a property is enumerable
const x4 = {"p":4};
console.log( x4.propertyIsEnumerable("p") ); // true
console.log( Object.getOwnPropertyDescriptor(x4, "p").enumerable ); // true

[see JS: Property Attributes, writable, enumerable, configurable]

Reference

ECMAScript 2015 §Fundamental Objects#sec-object.prototype.propertyisenumerable

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