It was true a few years ago, but Chrome no longer uses WebKit, they forked it to their own Blink engine, so now there are differences between them and you have

It was true a few years ago, but Chrome no longer uses WebKit, they forked it to their own Blink engine, so now there are differences between them and you have to write stylesheets for both (example: -apple-system font vs BlinkMacSystemFont). Although some code is still being ported between them (e.g. Safari recently "Enabled support for a modern CSS parser, ported from Blink, that improves performance, specification compliance, and compatibility with other browsers, while also adding support for scientific notation in all CSS numbers" https://webkit.org/blog/7120/release-notes-for-safari-technology-preview-20/ https://webkit.org/blog/7120/release-notes-for-safari-techno...).