JS: Set Object's Prototype

By Xah Lee. Date: .

You can use the following ways to set a object's parent.

Note: it's recommend you NEVER change a object's parent. Due to how JavaScript is implemented, changing a object's parent causes major slow down. (as of 2017-09-07)

Object.setPrototypeOf

〔►see JS: Object.setPrototypeOf

Set Value Property __proto__

const aa = [4,6];

function FF () { }

// set a object's parent
console.log(
    aa.__proto__ = FF
); // [Function: FF]

console.log (
    Object.getPrototypeOf ( aa ) === FF
 ); // true

ECMAScript® 2016 Language Specification#sec-additional-properties-of-the-object.prototype-object

Object and Inheritance Topic

  1. JS: Object System Overview
  2. JS: What's Object?
  3. JS: Prototype and Inheritance
  4. JS: Create Object
  5. JS: Object Literal Expression
  6. JS: Find Object's Prototype
  7. JS: Set Object's Prototype
  8. JS: How to Create Object with Parent X?
  9. JS: Prevent Adding Property
  10. JS: Determine Type of Object
  11. JS: Primitive Value Object Wrapper
  12. JS: Clone, Deep Copy Object/Array
  13. JS: Test Equality of Objects

  1. JS: Object Object
  2. JS: Object.prototype
Like what you read? Buy JavaScript in Depth