# Method is not defined on the instance but referenced during render

**URL:** <https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882>\
**Category:** Developing Web Interfaces For ROS\
**Tags:** error\
**Created:** [October 1, 2021, 2:06pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882 "2021-10-01T14:06:38Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![granty100](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/g/aeb1de/32.png) [@granty100](https://get-help.theconstruct.ai/u/granty100)\
**Post date:** [October 1, 2021, 2:06pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882/1 "2021-10-01T14:06:38Z")

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I am following the project " Developing Web Interfaces for ROS" and am on episode 4. I have got everything working before this but when it had me update my html and js file, I get these errors.

 ![image](https://get-help.robotigniteacademy.com/uploads/default/original/2X/1/1770e569d41a3c695cf1ccb9c03e1aea47892511.png)

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**Author:** ![marco.nc.arruda](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/marco.nc.arruda/32/2639_2.png) [@marco.nc.arruda](https://get-help.theconstruct.ai/u/marco.nc.arruda)\
**Post date:** [October 4, 2021, 12:41pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882/2 "2021-10-04T12:41:01Z")

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Hi @granty100 ,

Could you point out the link of the video you are following?

I’d also ask for your code, if you can share a public repository, it would be perfect, so I can debug it myself and find the error easily.

Regards

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**Author:** ![granty100](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/g/aeb1de/32.png) [@granty100](https://get-help.theconstruct.ai/u/granty100)\
**Post date:** [October 4, 2021, 1:12pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882/3 "2021-10-04T13:12:35Z")

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Hey @marco.nc.arruda ,

Thanks for the reply, it seems to be working good today. I will message you if otherwise.

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**Author:** ![marco.nc.arruda](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/marco.nc.arruda/32/2639_2.png) [@marco.nc.arruda](https://get-help.theconstruct.ai/u/marco.nc.arruda)\
**Post date:** [October 4, 2021, 1:13pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882/4 "2021-10-04T13:13:49Z")

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Great, thanks for your reply

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**Author:** ![marco.nc.arruda](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/marco.nc.arruda/32/2639_2.png) [@marco.nc.arruda](https://get-help.theconstruct.ai/u/marco.nc.arruda)\
**Post date:** [October 4, 2021, 1:14pm UTC](https://get-help.theconstruct.ai/t/method-is-not-defined-on-the-instance-but-referenced-during-render/12882/5 "2021-10-04T13:14:06Z")

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