Bug 218061 – Web Inspector: Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

• Component: Web Inspector
• Status: RESOLVED FIXED

[Devin Rousso]

not really sure what I was doing, but I was looking at cookies :|

Uncaught Exceptions:
-----------------------
 - undefined is not an object (evaluating 'value.truncate') (at DOMStorageContentView.js:160:21)
    _truncateValue @ DOMStorageContentView.js:160:21
    itemUpdated @ DOMStorageContentView.js:136:36
    dispatch @ Object.js:165:30
    dispatchEventToListeners @ Object.js:172:17
    itemUpdated @ DOMStorageObject.js:135:38
    itemUpdated @ DOMStorageManager.js:142:35
    domStorageItemUpdated @ DOMStorageObserver.js:48:41
    _dispatchEvent @ Connection.js:210:26
    dispatch @ Connection.js:79:32
    dispatchMessageFromTarget @ TargetManager.js:176:39
    dispatchMessageFromTarget @ TargetObserver.js:47:51
    _dispatchEvent @ Connection.js:210:26
    dispatch @ Connection.js:79:32
    dispatch @ InspectorBackend.js:232:52
    ? @ MessageDispatcher.js:42:34

Additional Details:
    cause --> An uncaught exception was thrown while handling event: DOMStorage.domStorageItemUpdated
-----------------------

Notes:
Inspected URL:        https://www.cbc.ca/account/profile
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)
Dispatch Source:      Protocol Event

Protocol Event:
{"method":"DOMStorage.domStorageItemUpdated","params":{"storageId":{"securityOrigin":"https://www.cbc.ca","isLocalStorage":true},"key":"_cX_atfr","oldValue":"&altm=1603323791017&arnd=kgk1l6splslgirr7&aatm=2&axtl=&awsz=2560x446&amvw=2560x593&ascp=45x593&aclk=0","newValue":"&altm=1603323791017&arnd=kgk1l6splslgirr7&aatm=29&axtl=&awsz=2560x446&amvw=2560x593&ascp=45x593&aclk=0"}}

[Radar WebKit Bug Importer]

<rdar://problem/70551334>

[Devin Rousso]

(In reply to Devin Rousso from comment #0)
> not really sure what I was doing, but I was looking at cookies :|
sorry i meant session storage 😅

[Federico Bucchi]

Created attachment 412482 [details]
Fix Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

[Devin Rousso]

Comment on attachment 412482 [details]
Fix Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

r-, as this covers up the issue instead of solving it

I think the real problem is that `WI.DOMStorageObject.Event.ItemUpdated` dispatches with `{key, oldValue, newValue}` but `WI.DOMStorageContentView.prototype.itemUpdated` uses `value`.

[Federico Bucchi]

Created attachment 412506 [details]
Fix Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

[Devin Rousso]

Comment on attachment 412506 [details]
Fix Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

View in context: https://bugs.webkit.org/attachment.cgi?id=412506&action=review

> Source/WebInspectorUI/UserInterface/Models/DOMStorageObject.js:130
> -    itemUpdated(key, oldValue, newValue)
> +    itemUpdated(key, value)

This has to stay as it was before, as this is being called by `WI.DOMStorageObserver.prototype.domStorageItemUpdated` which comes from the protocol.

Basically, I think all you need to do is change `{key, oldValue, newValue}` to `{key, value: newValue}`.

[Federico Bucchi]

Created attachment 412581 [details]
Fix Uncaught Exception: undefined is not an object (evaluating 'value.truncate')

[Federico Bucchi]

Created attachment 412696 [details]
Patch

[Devin Rousso]

Comment on attachment 412696 [details]
Patch

r=me

[EWS]

Committed r269175: <https://trac.webkit.org/changeset/269175>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 412696 [details].