gatsby-starter-netlify-cms | Example gatsby + netlify cms project | Content Management System library

I'm using gatsby and using gatsby-starter-netlify-cms

and I'm trying to add validation for the number of characters in the widget string I have read in the docs that we can use pattern with regex to implements the validation

and here you can see how they use it

I can’t resolve issue with building gatsby site on netlify. Since a few days I’m getting following error:

I am building a website using Gatsbyjs and NetlifyCMS. I've started using this starter https://github.com/AustinGreen/gatsby-starter-netlify-cms, and I am trying to customise it now.

I want to use custom variables in the frontmatter of a markdown file like this:

GatsbyJS beginner here, trying to get the Bulma responsive menu toggle to apply the "is-active" class to the menu (gatsby v2 with gatsby starter netlify cms). all code here: https://github.com/pddew/gatsby-starter-netlify-cms

Currently the toggle button and script tags appear but the button doesn't respond.

There is a working version of this in the gatsby starter business- when I inspect and compare my site with this, I can't spot the error, only that there is no event listener on toggle button, when it seems there should be. When I inspect the site, the toggle.js script is being called and put in before the closing body tag, and the viewed.

I have tried building and deploying with no luck, clearing caches and swapping the scripts for bulma's suggested code.

Here is the relevant code. Any help with this greatly appreciated; I'm a bit stuck!

in Layout.js:

I've installed gastby 2 on an ubuntu 16.04 box