Gatsby のチュートリアルをやっていたところ gatsby develop でこけました。
$ npm install gatsby-plugin-typography typography react-typography typography-theme-kirkham gatsby-plugin-emotion @emotion/reactエラー発生
$ gatsby develop
success open and validate gatsby-configs - 0.020s
success load plugins - 0.169s
success onPreInit - 0.030s
success initialize cache - 0.027s
success copy gatsby files - 0.122s
success onPreBootstrap - 0.062s
success createSchemaCustomization - 0.001s
success Checking for changed pages - 0.008s
success source and transform nodes - 0.081s
success building schema - 0.234s
info Total nodes: 22, SitePage nodes: 1 (use --verbose for breakdown)
success createPages - 0.004s
success Checking for changed pages - 0.000s
success createPagesStatefully - 0.089s
success update schema - 0.034s
success write out redirect data - 0.003s
success onPostBootstrap - 0.002s
info bootstrap finished - 4.956s
success onPreExtractQueries - 0.001s
success extract queries from components - 0.131s
success write out requires - 0.009s
success run page queries - 0.020s - 3/3 151.58/s
error Generating SSR bundle failed
Can't resolve '@emotion/core' in 'C:\Users\user1\Documents\git\gatsby\tutorial-part-four\.cache'
If you're trying to use a package make sure that '@emotion/core' is installed. If you're trying to use a local file make sure that the path is correct.
error Generating SSR bundle failed
Can't resolve '@emotion/core' in 'C:\Users\user1\Documents\git\gatsby\tutorial-part-four\.cache'
If you're trying to use a package make sure that '@emotion/core' is installed. If you're trying to use a local file make sure that the path is correct.以下のパッケージをインストールしたら解消した。
$ npm install react-spinners$ gatsby develop
success open and validate gatsby-configs - 0.017s
success load plugins - 0.148s
success onPreInit - 0.032s
success initialize cache - 0.024s
success copy gatsby files - 0.130s
success onPreBootstrap - 0.048s
success createSchemaCustomization - 0.004s
success Checking for changed pages - 0.004s
success source and transform nodes - 0.058s
success building schema - 0.222s
info Total nodes: 22, SitePage nodes: 1 (use --verbose for breakdown)
success createPages - 0.007s
success Checking for changed pages - 0.000s
success createPagesStatefully - 0.093s
success update schema - 0.040s
success write out redirect data - 0.004s
success onPostBootstrap - 0.003s
info bootstrap finished - 4.923s
success onPreExtractQueries - 0.001s
success extract queries from components - 0.121s
success write out requires - 0.008s
success run page queries - 0.033s - 3/3 90.41/s
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You can now view gatsby-starter-hello-world in the browser.
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http://localhost:8000/
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View GraphiQL, an in-browser IDE, to explore your site's data and schema
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http://localhost:8000/___graphql
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Note that the development build is not optimized.
To create a production build, use gatsby build
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success Building development bundle - 9.997s