I added [[ https://www.mediawiki.org/wiki/Extension:EventLogging/Guide#QA | the JS to warn about validation errors]] and on testwiki when I click a TOC link on a testwiki page [[ https://test.wikipedia.org/wiki/Wikip%C3%A9dia:Escolha_do_artigo_em_destaque/Teste4 | sample ]] I get
[undefined] Missing property "action"
[undefined] Value null is the wrong type for property "duration" (integer expected)
With ?debug=1 the console shows is:
```
"[undefined] Missing property "action"" ext.eventLogging.core.js:302
<anonymous> ext.eventLogging.core.js:302
mw.trackSubscribe/<() load.php:10744
jQuery.Callbacks/fire() load.php:3119
jQuery.Callbacks/self.fireWith() load.php:3231
jQuery.Callbacks/self.fire() load.php:3238
mw.track() load.php:10721
mw.eventLog.prepare() ext.eventLogging.core.js:185
mw.eventLog.logEvent() ext.eventLogging.core.js:295
eventLogging.logEvent() ext.popups.eventlogging.js:78
mw.popups.render.closePopup() ext.popups.renderer.js:167
mw.popups.render.render() ext.popups.renderer.js:76
mw.popups.setupTriggers/<() ext.popups.core.js:155
jQuery.event.dispatch() load.php:4640
jQuery.event.add/elemData.handle() load.php:4309
"[undefined] Value null is the wrong type for property "duration" (integer expected)" ext.eventLogging.core.js:302
<anonymous> ext.eventLogging.core.js:302
mw.trackSubscribe/<() load.php:10744
jQuery.Callbacks/fire() load.php:3119
jQuery.Callbacks/self.fireWith() load.php:3231
jQuery.Callbacks/self.fire() load.php:3238
mw.track() load.php:10721
mw.eventLog.prepare() ext.eventLogging.core.js:185
mw.eventLog.logEvent() ext.eventLogging.core.js:295
eventLogging.logEvent() ext.popups.eventlogging.js:78
mw.popups.render.closePopup() ext.popups.renderer.js:167
mw.popups.render.render() ext.popups.renderer.js:76
mw.popups.setupTriggers/<() ext.popups.core.js:155
jQuery.event.dispatch() load.php:4640
jQuery.event.add/elemData.handle() load.php:4309
```
The sent event is:
{
"event": {
"duration": null,
"sessionId": "kq0CRGu5wAyxMwtmshiIhyVa1KRplBNJ"
},
"clientValidated": false,
"revision": 7536956,
"schema": "Popups",
"webHost": "test.wikipedia.org",
"wiki": "testwiki"
}
Note "clientValidated": **false**`