697590 - `tabs.attach` should provide an `onAttach` property in options like page-mod does.

Status: RESOLVED DUPLICATE of bug 755963

(Add-on SDK Graveyard :: General, enhancement, P3)

Description

[Matteo Ferretti [:zer0] [:matteo]]

There isn't an elegant way to know when a contentScript is attached using tabs API. We should be able to do something like page-mode does, so:

    tabs.open({
      url: url,
      onReady: function onReady(tab) {
        tab.attach({
          contentScript: "doSomething();",
          onAttach: function() {
            console.log("script attached");
          }
        });
      }
    });

At the moment we have to use a workaround with `onMessage` to obtain a similar result:

    tabs.open({
      url: url,
      onReady: function onReady(tab) {
        tab.attach({
          contentScript: "doSomething();\
            self.postMessage(1)",
          onMessage: function(){
            console.log("script attached");
          }
        });
      }
    });

Comment 1

[Erik Vold [:erikvold] (please needinfo? me)]

Taking myself off things that I won't be able to get to for awhile.

Comment 2

[Erik Vold [:erikvold] (please needinfo? me)]

We plan to deprecate this api, so I don't think making it easier to use is worthwhile.  See bug 755963 for more information.