🎤 Builder Talk: The Story Behind Lady Gaga’s Digital Experience – Register now

Troubleshooting issue with mapping over an array in JavaScript

11 replies
Last updated: Jul 1, 2021
how can I map over an array? I'm getting undefined when trying to use it. i can console log and see the array but when i try and map its returning undefined ?
Jul 1, 2021, 10:00 AM
Can I see some of your code? Are you asking about mapping over an array in JavaScript, or inside a GROQ query?
Jul 1, 2021, 10:16 AM
So I can console.log this array and i get the expected result, however when I map over it I get undefined ... is this a javascript async await issue?
Jul 1, 2021, 11:10 AM
Hm, that’s unexpected. Should not be async-related. What does
typeof submenu
say?
Jul 1, 2021, 11:15 AM
I assume it’s
submenu
you’re talking about
Jul 1, 2021, 11:15 AM
if i do an Array.isarray on the submenu it returns true ...
Jul 1, 2021, 11:23 AM
its so strange.
Jul 1, 2021, 11:24 AM
Does
.map()
actually work? What happens if you do:
submenu.map(console.log)
Jul 1, 2021, 11:26 AM
I think i found the issue, testing now
Jul 1, 2021, 11:30 AM
I wasnt fetching the staticpaths correctly i think
Jul 1, 2021, 11:31 AM
Thanks for your reply! In my static path query i was defining an object and not an array. wokring now.
Jul 1, 2021, 11:32 AM
Great!
Jul 1, 2021, 11:40 AM

Sanity– build remarkable experiences at scale

Sanity is a modern headless CMS that treats content as data to power your digital business. Free to get started, and pay-as-you-go on all plans.

Was this answer helpful?

Related answers

Get more help in the community Slack

TopicCategoriesFeaturedRepliesLast Updated
Hey all - what’s the quickest way to batch delete all documents of a certain type? It looks like the `sanity` cli tool allows...Jan 29, 2021
In the tutorial, there is samples of what the API returns as JSON. Is there a way to view these ?Jan 11, 2021
Warning: Data for Page Exceeds the Threshold of 128 kBAug 17, 2022
Custom Document Views - Is it Even Possible to Use the Structure Builder?Apr 21, 2022
How to get the number of nested/children components in a GROQ query.Jan 19, 2024
Issue with fetching data from an array of references and non-references in a groq query.Dec 14, 2023
GraphQL query resolving references on a _raw field in GatsbyMay 17, 2022
GROQ query for getting references from arrays in another array in Sanity.ioApr 9, 2020
How to fetch an array of images using groq in Sanity.ioMay 21, 2023
Is there a way to write a groq query that checks if a boolean is true, and if so, returns an array of referenced documents?...Feb 1, 2021

Related contributions

Turbo Start Sanity
- Template

The battle-tested Sanity template that powers Roboto Studio's websites

Go to Turbo Start Sanity

Schema UI - Next.js Sanity Starter
- Template

A Next.js starter template with Next.js 15, Tailwind CSS, shadcn/ui, and Sanity CMS with Live Editing. Get production-ready React components with matching Sanity schemas and queries. Build dynamic pages faster while keeping full control over customization.

Serge Ovcharenko
Go to Schema UI - Next.js Sanity Starter

The Swaddle
- Made with Sanity

A new brand identity to represent a more mature company, to signify The Swaddle’s evolution from publisher to production house, combined with an easier to navigate platform that can surface multiple content types - drawing readers through The Swaddle’s content offering.

Nightjar
Go to The Swaddle