Page <script> Calls page-mod Function

[Gabe]

Is it possible for a page-mod to define objects that are visible to
the code executing in a page's <script> elements? I saw a few mentions
about exporting JavaScript APIs using wrappedJSObject, etc.; but there
aren't any wrappedJSObjects (e.g. window.wrappedJSObject,
global.wrappedJSObject, etc.) in the context in which the page-mod
executes.

[Hernan Rodriguez Colmeiro]

Inside the page-mod you can get hold of the window global. Add
properties there and scripts running on the page will see them.

Hernán

[Alexandre poirot]

With the coming 1.0b4 version, you can do that!
I've attached a full working example in pagemod-example.zip
But :
1/ take care that there is still important bugs around content scripts scope, that may change these scripts behavior! I suggest you to follow this bug if you start using this:
  https://bugzilla.mozilla.org/show_bug.cgi?id=601295
2/ these pratices are easily subject to various security issues! So please don't do this if you don't really manage the subject.

Here is the main code used to expose a function to websites
### main.js
let pageMod = require("page-mod").PageMod({
    include: ["*"],
    contentScript: "new " + function ContentScriptScope() {
      window.myMethod = function (arg) {
        postMessage(arg);
      };
    },
    contentScriptWhen: "start", /* this is really important in order to be able to call this method before onload event */
    onAttach: function(worker) {
      worker.on("message", function (data) {
        // This will be called when the content script forward the call from the website
        // data is equal to the data given by the web page
        // here data="data-from-website"
       
      });
    }
  });

### website.html
...
<script>
myMethod("data-from-website");
</script>
...

2011/3/23 Gabe <grp...@gmail.com>

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