Delete comment Comment by glyphobet, Today (moments ago)

I had no idea how to "put it in your Emacs load-path somewhere" and various Google searches were no help. Here's what eventually worked for me, in emacs:

1. make the directory ~/.emacs.d/js2/

2. put js2.el and js2.elc in ~/.emacs.d/js2/`

3. add these three lines to your ~/.emacs file:

(setq load-path (append (list (expand-file-name "~/.emacs.d/js2")) load-path))
(autoload 'js2-mode "js2" nil t)
(add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))

Thanks, got it now!

Is it possible to add some supports for Ajax module like JQuery, Dojo, YUI and so on?

Byte compiling throws an error in emacs-cvs from yesterday:

Compiling file /home/myusername/.elisp/js2.el at Thu May 15 15:09:23 2008 js2.el:6787:24:Error: Variable binding depth exceeds max-specpdl-size

The path for load-paths is normally the lisp directory.

c:/emacs/lisp

for example

@mixandgo, I was able to compile successfully from the command line:

shell> emacs --batch --eval '(byte-compile-file "js2-20080616a.el")'

I'm running Emacs 23.0.60.1

I have the same problem with CVS emacs, I can compile it as the comment above sugested, but when I try to open a javascript file I get this error:

File mode specification error: (error "You must byte-compile js2-mode before using it.")

My js2.elc file is there.

emacs-version

GNU Emacs 23.0.60.1 (i686-pc-linux-gnu, GTK+ Version 2.12.11) of 2008-09-22

This works on Ubuntu 8.04 (Hardy Heron): http://ubuntuforums.org/showpost.php?p=675916&postcount=3

Note that emacs must be opened with 'sudo' to have permission to write to "/usr/share/emacs/<version>/lisp".

If you have error message "You must byte-compile js2-mode before using it.", then check nXhtml package. It uses OLD js2 mode with name js2-new.el... :(

Hey, I just got it installed, opened my first JS file to start editing... what is up with the behavior of TAB and auto-indenting?! Hitting tab mutiple times keeps re-indenting it to different levels! I differs from line-to-line, in loops like (0, 4, 0, 4, ...) or (0, 4, 8, 0, 4, 8, ...) or (12, 8, 4, 12, 8, 4, ...), or (16, 12, 0, 16, 12, 0, ...)

Syntax hiliting is great, but without smart auto-indenting, I'd rather use my javascript-mode. Am I missing something?

It cycles through various TAB positions based on the previous line, bracket etc. (it's all on his blog), which is actually brilliant because keep hitting TAB in an IDE and it will just keep tabbing the line out, which is hardly ever what you want. Just keep hitting TAB until it's where you want. JS-2 mode also has a syntax checker, which I don't think javascript-mode has unless I'm misinformed.

Coupled with Ejacs (great name), JavaScript? shell, this is a great setup. (Thanks, Steve)

But, all other code editing modes in emacs, Perl, PHP, java, C, etc have the same tab behavior, you hit tab (any number of times, wherever you are in a line) and it indents that line properly to the One place the indentation makes sense. Can't the syntax reader just read the surrounding code and pick the one place the indent should be? e.g the K&R style? Yeah, maybe it's a step up from other IDE's, but it's a major step back from the emacs usual behavior.

If you get You must byte-compile js2-mode before using it., also make sure that you have named the file js2.el and not, say js2-20090723a.el.

I had the same error as Gopal above and can confirm that the command line compilation did work with my GNU Emacs 23.0.96.1

unlox775: You can set js2-bounce-indent-flag to nil in order to get your traditional indentation behaviour

I'm including the two lines specified in the instructions to my .emacs file:

(autoload 'js2-mode "js2" nil t) (add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))

The mode is loading properly, but it's not activated immediately. Is there a way of avoiding hitting M-x js2-mode each time I want to turn it on?

A) @adambossy: Works fine (mode is loaded and activated immediately) on 'GNU Emacs 22.2.1 (i486-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of 2008-09-05 on vernadsky, modified by Ubuntu'.

B)Separately, I also suggest adding another add-to-list to get '.json' files in addition to '.js' files.

C)Is there a way to have js2-mode parse/load an ordered list of js files on activation? That way (of course), support could be extended to js frameworks.

D) Awesome JavaScript? mode! It doesn't have Aptana's speed/responsiveness issue.

I just grabbed the newest version, and it doesn't seem to be doing the "bounce-indent" thing any more. Is there some setting I am missing? My code is a bit too...wide...like this:

$(document).ready( function(){
                       $.ajaxSetup({
                                       url: "/index.php",
                                       type: "GET"
                                   });
                   });

Aha, I found the problem... I needed to set js2-bounce-indent-p, but it wasn't visible in M-x customize

If you have the problem with "Variable binding depth exceeds max-specpdl-size". You should see this http://code.google.com/p/js2-mode/issues/detail?id=68

adambossy, to fix problem "not activated js2-mode" you need put

(add-to-list 'auto-mode-alist '("\\.js$" . js2-mode)) 

after loading nxhtml. If you don't use this, try to check variable auto-mode-alist: C-h v auto-mode-alist

If you get You must byte-compile js2-mode before using it. and you have byte-compile'd the .el, then load-file js2.elc is your friend, i.e. load the byte-compiled file not the .el.

I've tried to byte-compile js2.el with GNU Emacs 24.0.50.1, but I've got the following warnings and error:

js2.el:3517:1:Warning: cl package required at runtime

In js2-node-string: js2.el:5907:48:Warning: save-excursion' defeated by set-buffer' js2.el:7309:24:Error: Lisp nesting exceeds `max-lisp-eval-depth'

Can you tell me how I can solve this problem? I've already set the max-lisp-eval-depth to 10000 instead of 1000.

Thanks in advance!

edipretoro, I met the same problem today. I don't know why but it didn't happen again once I commented out js2 lines in my .emacs file together with nXhtml lines and did a restart of emacs. HTH.

Hi, I'm new to js2-mode. I have a basic question. I wish to be able to have my new lines to be always indented x spaces. For example:

(function($) {

var x = function() {

$('tag').a = {

event1 : 'hello', event2 : 'world'

}

}

My first try of js2-mode seems to give me the following: (function($) {

var x = function() {

$('tag').a = {

event1 : 'hello', event2 : 'world'

}

}

What am i doing wrong? What do I need to adjust using customize-group js2-mode to get what I want? Thanks very much!

This mode does not have customizable indentation the way cc-engine modes do (e.g. java-mode, c-mode, objc-mode). It is a significant amount of work to create a customizable indenter.

I just would like to be able to set the indentation to something different than 2 spaces (to 4 spaces, in this case). Does this mean that it is not possible right now, or, taking the words of unlox775, am I missing something?

How can I disable the behavior of adding something like this on return:

"

+ "

It's because of regular expressions (var x = /abc/g;), so it's even wrong. I think I have turned everything to nil in the property sheet but I can't disable this behavior...

Has anyone tried using jsctags with emacs? I'm wondering if this will be compatible with js2.

levialanm: Using jsctags should be orthogonal to js2-mode. js2-mode doesn't touch the tags table, it only generates imenu index.

joern.heid: This should only occur in large buffers when the parsing has been interrupted. If so, it should be fixed with commit cfb3cd in this fork: https://github.com/mooz/js2-mode/ If not, feel free to create an issue there. Then I'll look into it.

j.pertres: Just set js2-basic-offset to 4 (it's the default value, actually). Customizable indentation that your quote is referring to is the more flexible mechanism present in cc-engine modes that allows you to tweak indent size in various syntactic positions.

Hey, is there a hotkey that I can use to find syntax errors?

I try to install js2, but when I run customize-group, there is no js2-mode in the list. I am running Debian Squeeze and installed js2-mode from the Debian repository.

@champ - C-x `