Apply functions

Responding to question from Sam at https://twitter.com/samccone/status/896477039389138944

• labelv8
• labelnode

Node.replaceChild vs ChildNode.replaceWith vs append & remove

• labeldom
• labelnode
• labelchildnode
• labelreplacechild
• labelreplacewith

DOM node property access

Test if it is faster to access user-defined or native DOM property

• labeldom
• labelnode
• labelproperty