# React
Functionallity varies between projects, some do not generate correct sourcemaps for all the CSS. React projects often generate incorrect line numbers for CSS in JS.
# Next
By default, using @zeit/next-css
or @zeit/styled-jsx
, sourcemaps are not correctly generated.
# Gatsby
Fully working using CSS files (like 404.css
).
# Styled Components
Does not support sourcemaps yet, there is currently an open pull request to add sourcemaps to styled components.