Connecting javascript functions to XUL file

Question

I have a javascript file connected to my XUL file as follows:

<script type="application/javascript"
  src="chrome://myexample/content/myexample.js"/>

The overlay from the XUL file is displayed in Firefox, but my functions aren't working.

e.g.

<statusbar id="status-bar"> 
<statusbarpanel id="f1"  
    label="f1"
    onclick = "MyExample.f1()"
  />
</statusbar>

myexample.js file looks like:

var MyExample = {
  f1: function() {
  },
  f2: function() {
  }
}

This is my chrome.manifest:

content   myexample  content/
overlay chrome://browser/content/browser.xul  chrome://myexample/content/myexample.xul

Where could be the fault?

Nickolay · Accepted Answer · 2011-11-25 22:03:34Z

1

+50

There doesn't seem to be anything wrong with the code you posted, apart from the missing = in

var MyExample = {

...not sure if that's a typo in the original code or just in the snippet here.

Did you set the javascript.options.showInConsole and check the Error Console? Are there any messages there when you open the window you try to modify?

You could also be hitting the fact that the chrome code is cached. The effect is that the code you have in your file is not the same code that's running in Firefox. The way to deal with it is to set the disable_xul_cache pref mentioned on the same page as the showInConsole pref I linked to above (and/or run with -purgecaches param). If you have any doubts, make an observable change (i.e. one that has to change the observed behaviour, e.g. pops an alert) to the file you think is cached.

[edit] also you could try opening chrome://myexample/content/myexample.js in a tab to see if the chrome.manifest magic is working correctly and you got the URL right, but I guess in your case it's fine.

edited Nov 25, 2011 at 22:03

answered Nov 25, 2011 at 21:46

Nickolay

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8 Comments

xralf Over a year ago

It was a type in just snippet in the question :-(

xralf Over a year ago

Is it possible that firefox 8.0 doesn't allow unpacked extensions? When I try to open chrome://myexample/content/myexample.js it shows a message:

Firefox can't find the file at jar:file:///home/xralf/.mozilla/firefox/pkebutrj.dev/extensions/[email protected]!/content/myexample.js.

I will append chrome.manifest to the question.

xralf Over a year ago

minor note: disable_xul_cache is not in about:config

xralf Over a year ago

The error console reports that chrome://myexample/content/myexample.xul was not found. Yesterday I installed Firefox 8.0 and the extension does not display my XUL either. I guess that the error is in chrome.manifest, install.rdf and extension name, but I don't know what could be wrong. I installed it with install from file option.

Nickolay Over a year ago

(Re minor note: disable_xul_cache is not the full name and you have to add it to about:config manually.) You other question indicates a packaging mistake, but doesn't contain enough info. What's "install from file", did you mean you installed the xpi file from the addon manager? what's the xpi contents (unzip -l /home/xralf/.mozilla/firefox/pkebutrj.dev/extensions/myexample@xralf.‌com.xpi)? Firefox tells you there's no ./content/myexample.js in the zip.

|

Ghokun · Accepted Answer · 2011-11-21 12:06:38Z

0

You dont need MyExample. part.

answered Nov 21, 2011 at 12:06

Ghokun

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