Can't get comment-uncomment.js to work about jupyter_contrib_nbextensions HOT 5 CLOSED

This extension is outdated. Thanks for bringing this up.
Try adding this to you custom.js file:

var add_edit_shortcuts = {
        'Alt-c' : {
            help    : 'toggle comments',
            help_index : 'eb',
            handler : function (event) {
                var cm=IPython.notebook.get_selected_cell().code_mirror
                var from = cm.getCursor("start"), to = cm.getCursor("end");
                cm.uncomment(from, to) || cm.lineComment(from, to);
                return false;
            }
        },
};
IPython.keyboard_manager.edit_shortcuts.add_shortcuts(add_edit_shortcuts);

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Thanks for looking this up. I tried your suggestion, but I stll get errors on the console:

Using //@ to indicate sourceMappingURL pragmas is deprecated. Use //# instead jquery.min.js:1
TypeError: IPython.keyboard_manager is undefined custom.js:123
"Default extension for cell metadata editing loaded." default.js:48
"Raw Cell Format toolbar preset loaded." rawcell.js:82
"Slideshow extension for metadata editing loaded." slideshow.js:43
"Session: kernel_created (9fe531c4-50d8-4cb3-943a-e085be4ff18a)" session.js:52
"Starting WebSockets:" "ws://localhost:8888/api/kernels/88c3ab91-e1d0-4655-b1a9-4a7aa7e3e93d" kernel.js:440
"Loaded extension: usability/codefolding/codefolding" utils.js:26
TypeError: string is undefined codemirror.js:7300
Use of getPreventDefault() is deprecated.  Use defaultPrevented instead. jquery.min.js:5
"Kernel: kernel_connected (88c3ab91-e1d0-4655-b1a9-4a7aa7e3e93d)" kernel.js:102
"Kernel: kernel_starting (88c3ab91-e1d0-4655-b1a9-4a7aa7e3e93d)" kernel.js:102
"Kernel: kernel_ready (88c3ab91-e1d0-4655-b1a9-4a7aa7e3e93d)" kernel.js:102

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From your console output, this looks might be related to something else.
Ttry executing the above lines in a notebook cell using:

%%javascript
...

This will execute the cell as javascript code.

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You're right, it works when executed from a cell. That's something! At least I can enable commenting and uncommenting from within a notebook until I find out what's wrong. Maybe in one of the previous attempts I left something...
Thanks again!

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I re-created my profile, added the javascript code you posted above to custom.js, and now it's working. One thing, I think, that was getting in the way from the beginning was the IPython's security feature for the notebook. Unless I did something stupid when I checked this, it is only after trusting the notebook I am using that the comment shorcut starts working. I guess I can close this issue now. Thanks for your help

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