The Object propertyIsEnumerable() method

Apr 19, 2019

Learn how the JavaScript propertyIsEnumerable() method checks whether a property exists on an object and is enumerable, returning true or false.

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Called on an object instance, accepts a string as argument. If the object has a property with the name contained in the string argument, and that property is enumerable, it returns true. Otherwise it returns false.

Example:

const person = { name: 'Fred' }

Object.defineProperty(person, 'age', {
  value: 87,
  enumerable: false
})

person.propertyIsEnumerable('name') //true
person.propertyIsEnumerable('age') //false

Tagged: JavaScript · All topics

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