Bug 218297 - Web Inspector: Uncaught Exception: TypeError: null is not an object (evaluating 'this._styleSheetTextRange.collapseToEnd')
Summary: Web Inspector: Uncaught Exception: TypeError: null is not an object (evaluati...
Status: RESOLVED DUPLICATE of bug 218035
Alias: None
Product: WebKit
Classification: Unclassified
Component: Web Inspector (show other bugs)
Version: WebKit Nightly Build
Hardware: All All
: P2 Normal
Assignee: Nobody
URL: https://www.target.com/c/halloween-ca...
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-10-28 11:28 PDT by Devin Rousso
Modified: 2020-10-28 11:31 PDT (History)
4 users (show)

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Description Devin Rousso 2020-10-28 11:28:37 PDT 
# STEPS TO REPRODUCE
1. inspect <https://www.target.com/c/halloween-candy-treats/-/N-55hso?Nao=0>
2. find "Trick-or-Treat" text in the Elements Tab
3. select one of the sibling `.h-sr-only` nodes
4. click in the `.h-sr-only` rule in the Styles panel in the details sidebar

Uncaught Exceptions:
-----------------------
 - TypeError: null is not an object (evaluating 'this._styleSheetTextRange.collapseToEnd') (at CSSStyleDeclaration.js:547:45)
    _rangeAfterPropertyAtIndex @ CSSStyleDeclaration.js:547:45
    newBlankProperty @ CSSStyleDeclaration.js:412:66
    addBlankProperty @ SpreadsheetCSSStyleDeclarationEditor.js:326:73
    _handleClick @ SpreadsheetCSSStyleDeclarationSection.js:608:52
    _handleClick @ [native code]
-----------------------

Notes:
Inspected URL:        https://www.target.com/c/halloween-candy-treats/-/N-55hso?Nao=0
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)
Comment 1 Radar WebKit Bug Importer 2020-10-28 11:28:53 PDT 
<rdar://problem/70772587>
Comment 2 Devin Rousso 2020-10-28 11:29:31 PDT 
NOTE: the CSS source of `.h-sr-only` is inlined in the HTML
Comment 3 Nikita Vasilyev 2020-10-28 11:31:26 PDT 
This looks like the same problem as in Bug 218035 Web Inspector: Can't edit certain style rules on twitter.com (created by React Native StyleSheet).

Thanks for reporting, though, now I know that the impact of it is more severe.

*** This bug has been marked as a duplicate of bug 218035 ***