
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