hsed.js is to html what sed(1) is to texts.
sed(1) can proceed texts with given regexp, but for html, its working level is too low, so I decide to build a tool to apply arbitrary JS codes upon html documents to proceed, in order to modify their content in a batch manner. Headless browsers like PhantomJS have already provided needed functionalities, so this tool may be implemented as a JS program interpreted with a Headless browsers. If so, the designation of its CLI interface may become a challenge, as Headless browsers usually do not provide command line option parsers like getopt(3).
This project is one of its kind!