TypeError "Cannot set property connection of #<Navigator>" in console when upgrading project to latest version of Cordova 4.0.0

Question

Today, I upgraded Cordova-CLI from version 3.5 to version 4.0. After this, I updated a project's platform support to the latest version of Android (since they get updated separately now).

Ever since then, I get this error showing up whenever I run cordova run android, I get the following error:

Uncaught TypeError: Cannot set property connection of # which has only a getter at file:///android_asset/www/cordova.js:512

As a result, a lot of events in the app don't get run, causing that app to not work.

Answer 1

I started getting this after updating Cordova but only on very old Android phones. As a workaround I put a try/catch block around the contents of the function generating the error (clobber) in cordova.js :

    function clobber(obj, key, value) {
      try {
        exports.replaceHookForTesting(obj, key);
        obj[key] = value;
        // Getters can only be overridden by getters.
        if (obj[key] !== value) {
            utils.defineGetter(obj, key, function() {
                return value;
            });
        }
      }
      catch (e){
        console.error('clobber error '+e+', obj='+JSON.stringify(obj)+', key='+JSON.stringify(key)+', value='+JSON.stringify(value));
      }
    }

This obviously isn't the best fix but at least it lets the initialization complete and seems to not be affecting my app.

Answer 2

I met the same problem with Android cordova 3.6.4 got via CLI 4.1.2. I tried to merge two fixing of the issue:CB-7868. The first fixing can be saw with the link CB-7868,https://github.com/apache/cordova-js/pull/88. The second fixing is on the comment on CB-7868.

See *************

function clobber(obj, key, value) {

exports.replaceHookForTesting(obj, key);

obj[key] = value;
var needsProperty = false;
try { obj[key] = value; }
catch (e) { needsProperty = true; }
// Getters can only be overridden by getters.
if (obj[key] !== value) {
   if (needsProperty || obj[key] !== value) {
       utils.defineGetter(obj, key, function() { return value; }
 );

---

With those two fixing. There is no error reported on Android API14(4.0) and API15(4.0.3). But, I didn't try if the related plugins can work not. It means I don't know if the fixing is right or not.

Also, I got cordova 3.7.0 via CLI 4.1.2 for IOS platform. I can see the fixing, https://github.com/apache/cordova-js/pull/88, has been applied on 3.7.0 JS. But, the function ,clobber, still haven't above fixing. Also, there is no available 3.7.0 for Android cordova. It is still 3.6.4 for Android platform.