Community Plugin
View plugin on GitHubgatsby-plugin-typescript-checker
gatsby-plugin-typescript adds TypeScript transpilation but not type checking. This plug adds fork-ts-checker-webpack-plugin to Gatsby to display type errors in the browser and the command line.

Install
yarn add gatsby-plugin-typescript gatsby-plugin-typescript-checkergatsby-config.js
module.exports = {
  plugins: [
      'gatsby-plugin-typescript',
      'gatsby-plugin-typescript-checker'
  ]
}