'React' must be in scope when using JSX

'React' must be in scope when using JSX

'React' must be in scope when using JSX

'React' must be in scope when using JSX

'React' must be in scope when using JSX

Using target="_blank" without rel="noreferrer" (which implies rel="noopener") is a security risk in older browsers: see https://mathiasbynens.github.io/rel-noopener/#recommendations

'React' must be in scope when using JSX

'Heading' is defined but never used

'React' must be in scope when using JSX