# Js building block and Open Local Dev

**URL:** <https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430>\
**Category:** CMS Development\
**Tags:** local-development, javascript\
**Created:** [January 9, 2024, 4:00pm UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430 "2024-01-09T16:00:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ROASJ](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/roasj/32/43030_2.png) [@ROASJ](https://community.hubspot.com/u/ROASJ)\
**Post date:** [January 9, 2024, 4:00pm UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430/1 "2024-01-09T16:00:59Z")

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Hi, I’m starting with “js-building-block”, but I can’t find the section of the sprocket menu : Open Local Dev Server

 ![Captura de pantalla 2024-01-09 a las 16.50.09.png](https://d2qpr2jzcazej7.cloudfront.net/original/3X/9/0/904f14310aa46bf67cf84fb70d9c757889d1283f.png)

I am following the steps in the tutorial:

> **[cms-js-building-block-examples/hello-world at main ·...](https://github.com/HubSpot/cms-js-building-block-examples/tree/main/hello-world)**
>
> main/hello-world

greetings and thank you

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**Author:** ![Jaycee\_Lewis](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/jaycee_lewis/32/61352_2.png) [@Jaycee\_Lewis](https://community.hubspot.com/u/Jaycee_Lewis)\
**Post date:** [January 12, 2024, 10:27pm UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430/2 "2024-01-12T22:27:51Z")

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Hi there! Just checking in to see if you were able to this resolved?

Best,

Jaycee

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**Author:** ![marcosiegl](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/marcosiegl/32/197481_2.png) [@marcosiegl](https://community.hubspot.com/u/marcosiegl)\
**Post date:** [January 24, 2024, 11:24am UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430/3 "2024-01-24T11:24:42Z")

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hi @ROASJ ,  
I am trying to use JS building blocks example at [GitHub - HubSpot/cms-js-building-block-examples: DEPRECATED, go to https://github.com/HubSpot/cms-react instead · GitHub](https://github.com/HubSpot/cms-js-building-block-examples), but I cannot get it up and running. The Setup & Documentation is kind of a mess to me.  
When trying to run the local cms dev server, there are missing scopes.  
message: “This app hasn’t been granted all required scopes to make this call. Read more about required scopes here: [Scopes - HubSpot docs](https://developers.hubspot.com/scopes.)”  
This means I first have to setup a private app and grant scope permissions. I am quite not sure about these because the scope names in hubspot account don’t match the documened scopes at [cms-js-building-block-examples/hello-world/README.md at main · HubSpot/cms-js-building-block-examples · GitHub](https://github.com/HubSpot/cms-js-building-block-examples/blob/main/hello-world/README.md)  
Is it true that JS building blocks only work in private apps?  
From watching this Hubspot Developers Video at [https://www.youtube.com/watch?v=chj-\_yBN5\_c](https://www.youtube.com/watch?v=chj-_yBN5_c)  
I assumed we can start using React for our complete hubspot CMS site?  
It would be great if you could help to clearify things!  
Hopefully any Hubspot Devs could also chime in here?  
Cheers, Marco

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<div class="post-metadata">

**Author:** ![ROASJ](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/roasj/32/43030_2.png) [@ROASJ](https://community.hubspot.com/u/ROASJ)\
**Post date:** [March 4, 2024, 11:05am UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430/4 "2024-03-04T11:05:29Z")

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Hi @marcosiegl , you don’t need to have a private application to use JS building blocks.

And I agree with you that the documentation is a bit confusing.  
Sorry I can’t help you, I haven’t managed to get it working on my test portal yet.

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<div class="post-metadata">

**Author:** ![RAnonuevo123](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/ranonuevo123/32/204706_2.png) [@RAnonuevo123](https://community.hubspot.com/u/RAnonuevo123)\
**Post date:** [December 18, 2024, 6:36am UTC](https://community.hubspot.com/t/js-building-block-and-open-local-dev/97430/5 "2024-12-18T06:36:31Z")

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same with getting-started boilerplate