Some features are omitted from our JSX DOM implementation. We should lint their users so that they don't accidentally use these:

🚫 Attribute names are not re-mapped.

• Use standard HTML attribute names on elements (class, not className).
• Dashes are ok, like data-foo="bar".

🚫 No objects in attribute values, like style={{width: 40}}

• For style, use strings instead.
• For class, call objstr() or use strings instead.

🚫 No Fragments

• Instead use a root node, or split into an array of nodes.

🚫 No dangerouslySetInnerHTML

• You should not do this anyway.

🚫 No SVG <foreignObject>