new examples

node/gatsby/gatsby-ssr.js

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+/**
+ * Implement Gatsby's SSR (Server Side Rendering) APIs in this file.
+ *
+ * See: https://www.gatsbyjs.com/docs/reference/config-files/gatsby-ssr/
+ */
+
+/**
+ * @type {import('gatsby').GatsbySSR['onRenderBody']}
+ */
+exports.onRenderBody = ({ setHtmlAttributes }) => {
+  setHtmlAttributes({ lang: `en` })
+}