web-mode VS lsp-mode

web-mode: https://web-mode.org/

Did you try web-mode? https://github.com/fxbois/web-mode/ It's the mode that made me accept HTML. There are shortcuts to: delete a node, wrap a node with another one, delete an attribute, copy a node, re-indent the buffer, go to the beginning/end of the node…

I’ve started to use emacs in my computer sciences school 30 years ago (EPITA in Paris). The Lab was surrounded by Mips, Sun, Alpha, … great time.

The only weakness of Emacs (according to me) was the lack of a good major mode (module) to edit web template : imagine editing a php block inside a javascript part embedded inside html.

After testing many modes, I started to develop web-mode (http://web-mode.org) that is now compatible with about thirty template engines. What a wondeful trip it was to discover the power of Lisp and what a pleasure it is everyday to know exactly what happens when I hit a key while editing an html file.

I am the only Emacs user in my company (kernix.com) but nothing would make me switch. I can not imagine using an editor that would not open in less than a second (or that would eat hundreds of Mo of RAM)

I Hope Emacs will see a usage surge with the inclusion of tree sitter… editing in emacs will be even faster and more robust. Not sure tree sitter is suitted for multi languages files … but for this you have web-mode ;)

web-mode should be used for .erb files, per their docs

Web Mode has support for razor pages. I used it briefly and it seems to be good. Here are the relevant parts of my config:

web-mode for editing templates

Been using web-mode recently and possess noticed that marked regions are unmarked once the cursor is moved. I use expand-region normally to mark HTML tags and then tried to move up one line and the marked region is cancelled. Using C-SPC to mark regions does not face this issue. Anyone face this issue and solve it? I know there was a similar issue with multiple cursors but ‏‏‎ that was solvable by editing a custom variable found here. Any suggestions are welcomed as I do not even know where to begin to debug this issue. Thanks!

I also tried to the solutions suggested  and , but nothing worked. I moved the (setq lsp-keymap-...) line outside (and before) use-package. I also used :config (define-key lsp-load-map...) in my use-package block. But none of them worked.

Not sure how much this might help, but lsp-mode has lsp-yaml-select-buffer-schema and lsp-yaml-set-buffer-schema commands to pick schema from a list or set from a URI. Checking the source of them might give some hints about how the same could be implemented in eglot?

Beyond that you might as well embrace the suck and install autex with a language server: https://emacs-lsp.github.io/lsp-mode/

Smart completion these days is done primarily through LSP. eglot is fairly minimal but built-in as of 29, also available via GNU Elpa. lsp-mode is another option with more integrations and a bit more fleshed out.

lsp-mode: https://github.com/emacs-lsp/lsp-mode/issues/2080

Are you running emacs-29? It has numerous speed-ups compared to emacs-28 and older versions, many of them coded by Mattias Engdegård, e.g. commit def6fa4246. I have a fresh build of emacs-29 running on Linux and a new mac with an M1 CPU, and it's stupid fast. I don't use the native-comp feature. I rarely notice any hesitation or slowness. I don't use Elpy. I do use lsp mode.

Since you are doing code development, the first things to go for would be setting up your emacs packaging (installing use-package and melpa (use-package's documentation covers this) so you have more packages to choose from (do be careful to not just pick things willy nilly but research them a bit first)) and then setting up lsp-mode. lsp-mode lets you use LSP servers for the specific programming languages you work with in a somewhat unified fashion. You then need to install and setup the LSP servers for the languages you use, and possibly install language specific Emacs packages as support (note, Emacs has builtin functionality for many).

And first of all, I'm trying to understand, how is it connected to https://github.com/emacs-lsp/lsp-mode? I'm sure, that existed lsp implementations already parse source code. Why TreeSitter?