# emulator 4 and 5 inspect in new crome

**URL:** <https://forum.webostv.developer.lge.com/t/emulator-4-and-5-inspect-in-new-crome/28065>\
**Category:** SDK\
**Created:** [January 12, 2026, 11:49pm UTC](https://forum.webostv.developer.lge.com/t/emulator-4-and-5-inspect-in-new-crome/28065 "2026-01-12T23:49:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![user2139](https://avatars.discourse-cdn.com/v4/letter/u/4af34b/32.png) [@user2139](https://forum.webostv.developer.lge.com/u/user2139)\
**Post date:** [January 12, 2026, 11:49pm UTC](https://forum.webostv.developer.lge.com/t/emulator-4-and-5-inspect-in-new-crome/28065/1 "2026-01-12T23:49:20Z")

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when i test my app in webos 4 and 5 that inspect give error show below  
Uncaught TypeError: document.registerElement is not a function at UI.registerCustomElement (shell.js:3108:375) at shell.js:3120:144 at shell.js:3122:2038Understand this error devtools\_app.js:9 Uncaught ReferenceError: SDK is not defined at devtools\_app.js:9:239Understand this error inspector.js:2 Uncaught ReferenceError: SDK is not defined at inspector.js:2:79Understand this error :63712/favicon.ico:1 Failed to load resource: the server responded with a status of 404 (Not Found)

register element is not a function so how i can see element error related to those versions

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**Author:** ![narae0.kim](https://avatars.discourse-cdn.com/v4/letter/n/87869e/32.png) [@narae0.kim](https://forum.webostv.developer.lge.com/u/narae0.kim)\
**Post date:** [January 13, 2026, 12:04am UTC](https://forum.webostv.developer.lge.com/t/emulator-4-and-5-inspect-in-new-crome/28065/2 "2026-01-13T00:04:10Z")

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Please refer to [Launch Web Inspector](https://webostv.developer.lge.com/develop/tools/cli-dev-guide#launch-inspectors) and use Chrome v68. Thank you.