Data URLsData URLs are URLs that start with the data: scheme and which directly contain data rather than point to remote resources.widely2015-07-292018-01-29https://www.rfc-editor.org/info/rfc2397/https://developer.mozilla.org/docs/Web/URI/Reference/Schemes/datahttp.data-urlhttp.data-url.css_fileshttp.data-url.html_fileshttp.data-url.js_fileshttp.data-url.top_level_navigation_blockedhttps://nowyoucanuse.com/features--data-urls.html