Reload only changed file

[penge]

live-server: 1.2.1
nodejs: 10.15.3

Right now, when an html file is changed, server reloads every open page (browser tab):

clients.forEach(function(ws) {
  if (ws) ws.send(cssChange ? 'refreshcss' : 'reload');
});

It does not take the url of ws client into consideration.
It should reload only the page that was changed (applies to html files).

Solution: in case html file is edited, send reload to only those clients matching url with the changePath.

[arm-liang]

The live-server always reload the unrelated page when I change the file that is unused in page.
Suggest:

1. Use web socket to store every connection loaded resources
2. When detect file change and socket broadcast all the connections and judge whether change file list in every socket stored file list to determine refresh page.

It would be difficult to store every web socket connected file, I think.