I am trying to run a Gatsby site but when I do npm run develop
, I am getting this error:
> gatsby develop
ERROR #10123 CONFIG
We encountered an error while trying to load your site's gatsby-config. Please fix the error x try again.
Error: D:\Coding\web-blog\src\infra\feed.js:28
description: post.intro ?? post.description,
^
Code:
const item = {
title: sanitizeTitle(post.title),
description: post.intro ?? post.description,
url: `${site.siteMetadata.siteUrl}/${post.slug}`,
guid: `${site.siteMetadata.siteUrl}/${post.slug}`,
categories: post.tags,
author: site.siteMetadata.author,
date: post.date,
}
What is ??
operator in Javscript? Is it a new language feature?