const assert = require('assert');
class Super {}
class Sub extends Super {}
class SubSub extends Sub {}
assert.strictEqual(Sub.prototype instanceof Super, true);
assert.strictEqual(SubSub.prototype instanceof Super, true);
assert.strictEqual(Super.prototype instanceof Sub, false);
assert.strictEqual(SubSub.prototype instanceof Sub, true);
assert.strictEqual(Super.prototype instanceof SubSub, false);
assert.strictEqual(Sub.prototype instanceof SubSub, false);
More than 5 years have passed since last update.
Register as a new user and use Qiita more conveniently
- You get articles that match your needs
- You can efficiently read back useful information
- You can use dark theme
List of users who liked
21