| PASS setAttribute and removeAttribute must enqueue and invoke attributeChangedCallback | |
| PASS setAttributeNS and removeAttributeNS must enqueue and invoke attributeChangedCallback | |
| PASS setAttributeNode and removeAttributeNode must enqueue and invoke attributeChangedCallback for an HTML attribute | |
| PASS setAttributeNode and removeAttributeNS must enqueue and invoke attributeChangedCallback for an SVG attribute | |
| PASS Mutating attributeChangedCallback after calling customElements.define must not affect the callback being invoked | |
| PASS attributedChangedCallback must not be invoked when the observed attributes does not contain the attribute | |
| PASS Mutating observedAttributes after calling customElements.define must not affect the set of attributes for which attributedChangedCallback is invoked | |
| PASS attributedChangedCallback must be enqueued for attributes specified in a non-Array iterable observedAttributes | |
| PASS attributedChangedCallback must be enqueued for style attribute change by mutating inline style declaration | |
| PASS attributedChangedCallback must not be enqueued when mutating inline style declaration if the style attribute is not observed | |
| PASS Upgrading a parser created element must enqueue and invoke attributeChangedCallback for an HTML attribute | |
| PASS Upgrading a cloned element must enqueue and invoke attributeChangedCallback for an HTML attribute | |