# Warn user if MathJax can't be fetched from notebook closes #744 #868

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merged 3 commits into from Oct 15, 2011

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### 3 participants

Member
commented Oct 13, 2011
 just put this in notebook.html There was an issues trying to fetch MathJax.js from the internet. You might wan't to consider using "install_mathjax()" to be able to use the Notebook fonctionnality offline  And hide it at 's onload if window.mathjax found.
 Carreau Warn user if MathJax can't be fetched from notebook  closes #744 54ed7b2
IPython/frontend/html/notebook/templates/notebook.html
 @@ -49,6 +56,12 @@ Idle +
+ There was an issues trying to fetch MathJax.js from the internet. You might
 fperez Member typo: issue
IPython/frontend/html/notebook/templates/notebook.html
 @@ -49,6 +56,12 @@ Idle +
+ There was an issues trying to fetch MathJax.js from the internet. You might + wan't to consider using "install_mathjax()" to be able to use the Notebook
 fperez Member s/wan't/want/ The instructions should say instead: You may want to consider running "from IPython.external import mathjax; mathjax.install_mathjax()" in order to be able to use the Notebook. Note that this will require a working internet connection when run, and it will try to install MathJax into the directory where you installed IPython. If you installed IPython to a location that requires administrative privileges to write, you will need to make this call as an administrator. On OSX/Linux/Unix, this can be done at the command-line via 'sudo python -c "from IPython.external import mathjax; mathjax.install_mathjax"'. This will be much clearer and directly useful.
IPython/frontend/html/notebook/templates/notebook.html
 @@ -12,6 +12,13 @@ +
 fperez Member shouldn't this be merged with the next script section immediately below, which is also about mathjax anyway?
 Carreau Matjax Warning message improvement.  merge '
Member
commented Oct 14, 2011
 Fixed, with some styling inlined in HTML. I've also change from hide to removeChild
and 2 others commented on an outdated diff Oct 14, 2011
IPython/frontend/html/notebook/templates/notebook.html
 @@ -12,7 +12,13 @@ -
 minrk Member As I understand it, language="javascript" is deprecated, and type="text/javascript" is officially the way to declare script type. Carreau Member I've never done javascript before, so I trust you. minrk Member No worries, I didn't know either, but when I saw the inconsistency I Google'd it. We are pretty much all js novices here. fperez Member On Fri, Oct 14, 2011 at 11:48 AM, Min RK reply@reply.github.com wrote: No worries, I didn't know either, but when I saw the inconsistency I Google'd it.  We are pretty much all js novices here. Very true. It took me 2hours last night to get CodeMirror to toggle line-numbers on a per cell basis :) (pull request coming soon after I clean it up a little). Question: are we ready to merge this one, or is further cleanup needed? Carreau Member Very true. It took me 2hours last night to get CodeMirror to toggle line-numbers on a per cell basis :) (pull request coming soon after I clean it up a little). I though I was the only one :-) Question: are we ready to merge this one, or is further cleanup needed? Might want to test on IE6 ? Add a message for people with JS not activated ? fperez Member On Fri, Oct 14, 2011 at 1:16 PM, Bussonnier Matthias reply@reply.github.com wrote: Might want to test on IE6 ? We don't support IE at all, period. Let alone something as ancient as IE6. IE has no websocket support, so none of the notebook will ever work there until they add websockets. Add a message for people with JS not activated ? That, on the other hand, would be good, since pretty much nothing would work without JS. Giving an informative error would be good usability-wise. Carreau Member IE was a joke of course. I have no idea how to add a message that will be visible only to browser without JS, without having it "poping up" for a few millisecond for user having JS... minrk Member Note that you can't even get to the notebook page without js, since our whole UI (including the frontpage) is jQuery. A single line of plaintext 'IPython notebook requires javascript' shouldn't be bothersome. I don't think there's any need for more information than that these days. minrk Member Also a reason our pre-load warning messages may linger longer than others is that MathJax is huge, so loading up a notebook page can take a significant fraction of a second.
Member
commented Oct 14, 2011
 This looks good, but as it is, you can see the MathJax warning briefly on every notebook load. We should only draw the warning when the MathJax test fails, so initially it should have display:none, and add to the check:  function CheckMathJax(){ var div=document.getElementById("MatjaxFetchingWarning"); if(window.MathJax){ document.body.removeChild(div); }else{ div.style.display = "block"; } }
 Carreau Hide warning message about matjax when page load  also fix Matjax->MathJax 7a1207e
Member
commented Oct 14, 2011
 True, I was still thinking as if it would be executed after mathjax.js was loaded... and that the 'else' would then never be executed
merged commit 7a1207e` into ipython:master Oct 15, 2011
Member
commented Oct 15, 2011
 Thanks a lot for the work! Made some minor edits to the message before pushing.