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]

JS Object Property

  1. Property Overview
  2. Property Key
  3. Dot vs Bracket Notation
  4. Create/Delete Property
  5. Get/Set Property
  6. Property Existence
  7. Access Property
  8. List Properties
  9. Property Attributes
  10. Getter/Setter
  11. Property Descriptor
  12. Symbol

JS Object and Inheritance

  1. Object Overview
  2. Object Type
  3. Find Object's Type
  4. Prototype Chain
  5. Create Object
  6. Object Literal Expr
  7. Create Object with Parent X
  8. Get/Set Parent
  9. Show Prototype Chain
  10. Prevent Adding Property
  11. Clone Object
  12. Test Object Equality
  13. Add Method to Prototype

Like it? Help me by telling your friends. Or, Put $5 at patreon.

Or, Buy JavaScript in Depth

If you have a question, put $5 at patreon and message me.

Web Dev Tutorials