[IPython-dev] writing notebook extensions compatible with IPython.load_extensions

[Matthias Bussonnier]

Hi Max

Le 29 juin 2014 à 15:39, Max Linke a écrit :

> `IPython.load_extensions('test');`.

Where do you do that ? 


> 
> This is the code I have in ~/.ipython/nbextensions/test.js
> 
> 	IPython.toolbar.add_buttons_group([
> 	{
> 		'label' : 'test',
> 		'icon'  : 'icon-moon',
> 	   	'id'	: 'test-button'
> 	}
> 	]);
> 
> When I use this the js-console of chromium gives the following error

This works for me in master when copied past into Chrome console on IPython 3.0-dev.


> 
> 	Uncaught TypeError: Cannot read property 'add_buttons_group' of 
> 	undefined
> 
> But if I load test.js in custom.js like this it works.
> 
> 	$([IPython.events]).on('app_initialized.NotebookApp',function(){
>     	   require(['nbextensions/test.js']);
> 	});
> 
> What do I have to add to test.js so that the js functions in the IPython
> namespace are not undefined?

It is probably just a race condition : 

> 	$([IPython.events]).on('app_initialized.NotebookApp',function(){
>     	   IPython.load_extensions('test');
> 	});



Should work as  IPython.load_extensions is just a simple wrapper around require.
-- 
M