JS: Object.setPrototypeOf

By Xah Lee. Date: . Last updated: .

New in ES2015.

Object.setPrototypeOf ( obj, parent )

Set the parent of obj to parent.

Return the changed obj.

let aa = {};
let bb = Object.create (aa);

// bb's parent is aa
console.log ( Reflect.getPrototypeOf ( bb ) === aa ); // true

// now change parent
let cc = Object.setPrototypeOf ( bb, Array );

// return value is the new bb
console.log ( cc === bb ); // true
console.log ( Reflect.getPrototypeOf ( bb ) === Array ); // true

[see JS: Prototype and Inheritance]

[see JS: Get/Set Prototype]

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
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