How do I conditionally add attributes to React components?

Answer

Apparently, for certain attributes, React is intelligent enough to omit the attribute if the value you pass to it is not truthy. For example:

const InputComponent = function() {
const required = true;
const disabled = false;

return (
<input type="text" disabled={disabled} required={required} />
);
}
will result in:

<input type="text" required>