| PASS dropzone on HTMLElement must enqueue an attributeChanged reaction when adding webkitdropzone content attribute | |
| PASS dropzone on HTMLElement must enqueue an attributeChanged reaction when replacing an existing attribute | |
| PASS data on CharacterData must enqueue an attributeChanged reaction when replacing an existing attribute | |
| PASS data on CharacterData must not enqueue an attributeChanged reaction when replacing an existing unobserved attribute | |
| PASS remove(HTMLOptionElement) on HTMLOptionsCollection must enqueue disconnectedCallback when removing a custom element | |
| PASS remove(HTMLOptionElement) on HTMLSelectElement must enqueue disconnectedCallback when removing a custom element | |