Everything tagged web (1 post)

Decoding React Server Component Payloads

If you've spent any time playing with React Server Components, you've probably noticed a bunch of stuff like this at the bottom of your web pages:

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<script>self.__next_f.push([1,"3:I[\"(app-pages-browser)/./node_modules/next/dist/client/components/app-router.js\",[\"app-pages-internals\",\"static/chunks/app-pages-internals.js\"],\"\"]\n5:I[\"(app-pages-browser)/./node_modules/next/dist/client/components/client-page.js\",[\"app-pages-internals\",\"static/chunks/app-pages-internals.js\"],\"ClientPageRoot\"]\n6:I[\"(app-pages-browser)/./app/flight/page.tsx\",[\"app/flight/page\",\"static/chunks/app/flight/page.js\"],\"default\"]\n7:I[\"(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js\",[\"app-pages-internals\",\"static/chunks/app-pages-internals.js\"],\"\"]\n8:I[\"(app-pages-browser)/./node_modules/next/dist/client/components/render-from-template-context.js\",[\"app-pages-internals\",\"static/chunks/app-pages-internals.js\"],\"\"]\nc:I[\"(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js\",[\"app-pages-internals\",\"static/chunks/app-pages-internals.js\"],\"\"]\n4:D{\"name\":\"\",\"env\":\"Server\"}\n9:D{\"name\":\"RootLayout\",\"env\":\"Server\"}\na:D{\"name\":\"NotFound\",\"env\":\"Server\"}\na:[[\"$\",\"title\",null,{\"children\":\"404: This page could not be found.\"}],[\"$\",\"div\",null,{\"style\":{\"fontFamily\":\"system-ui,\\\"Segoe UI\\\",Roboto,Helvetica,Arial,sans-serif,\\\"Apple Color Emoji\\\",\\\"Segoe UI Emoji\\\"\",\"height\":\"100vh\",\"textAlign\":\"center\",\"display\":\"flex\",\"flexDirection\":\"column\",\"alignItems\":\"center\",\"justifyContent\":\"center\"},\"children\":[\"$\",\"div\",null,{\"children\":[[\"$\",\"style\",null,{\"dangerouslySetInnerHTML\":{\"__html\":\"body{color:#000;background:#fff;margin:0}.next-error-h1{border-right:1px solid rgba(0,0,0,.3)}@media (prefers-color-scheme:dark){body{color:#fff;background:#000}.next-error-h1{border-right:1px solid rgba(255,255,255,.3)}}\"}}],[\"$\",\"h1\",null,{\"className\":\"next-error-h1\",\"style\":{\"display\":\"inline-block\",\"margin\":\"0 20px 0 0\",\"padding\":\"0 23px 0 0\",\"fontSize\":24,\"fontWeight\":500,\"verticalAlign\":\"top\",\"lineHeight\":\"49px\"},\"children\":\"404\"}],[\"$\",\"div\",null,{\"style\":{\"display\":\"inline-block\"},\"children\":[\"$\",\"h2\",null,{\"style\":{\"fontSize\":14,\"fontWeight\":400,\"lineHeight\":\"49px\",\"margin\":0},\"childr"])</script>
<script>self.__next_f.push([1,"en\":\"This page could not be found.\"}]}]]}]}]]\n9:[\"$\",\"html\",null,{\"lang\":\"en\",\"children\":[\"$\",\"body\",null,{\"className\":\"__className_aaf875\",\"children\":[\"$\",\"$L7\",null,{\"parallelRouterKey\":\"children\",\"segmentPath\":[\"children\"],\"error\":\"$undefined\",\"errorStyles\":\"$undefined\",\"errorScripts\":\"$undefined\",\"template\":[\"$\",\"$L8\",null,{}],\"templateStyles\":\"$undefined\",\"templateScripts\":\"$undefined\",\"notFound\":\"$a\",\"notFoundStyles\":[],\"styles\":null}]}]}]\nb:D{\"name\":\"\",\"env\":\"Server\"}\nd:[]\n0:[[[\"$\",\"link\",\"0\",{\"rel\":\"stylesheet\",\"href\":\"/_next/static/css/app/layout.css?v=1719846361489\",\"precedence\":\"next_static/css/app/layout.css\",\"crossOrigin\":\"$undefined\"}]],[\"$\",\"$L3\",null,{\"buildId\":\"development\",\"assetPrefix\":\"\",\"initialCanonicalUrl\":\"/flight\",\"initialTree\":[\"\",{\"children\":[\"flight\",{\"children\":[\"__PAGE__\",{}]}]},\"$undefined\",\"$undefined\",true],\"initialSeedData\":[\"\",{\"children\":[\"flight\",{\"children\":[\"__PAGE__\",{},[[\"$L4\",[\"$\",\"$L5\",null,{\"props\":{\"params\":{},\"searchParams\":{}},\"Component\":\"$6\"}]],null],null]},[\"$\",\"$L7\",null,{\"parallelRouterKey\":\"children\",\"segmentPath\":[\"children\",\"flight\",\"children\"],\"error\":\"$undefined\",\"errorStyles\":\"$undefined\",\"errorScripts\":\"$undefined\",\"template\":[\"$\",\"$L8\",null,{}],\"templateStyles\":\"$undefined\",\"templateScripts\":\"$undefined\",\"notFound\":\"$undefined\",\"notFoundStyles\":\"$undefined\",\"styles\":null}],null]},[\"$9\",null],null],\"couldBeIntercepted\":false,\"initialHead\":[false,\"$Lb\"],\"globalErrorComponent\":\"$c\",\"missingSlots\":\"$Wd\"}]]\n"])</script>
<script>self.__next_f.push([1,"b:[[\"$\",\"meta\",\"0\",{\"name\":\"viewport\",\"content\":\"width=device-width, initial-scale=1\"}],[\"$\",\"meta\",\"1\",{\"charSet\":\"utf-8\"}],[\"$\",\"title\",\"2\",{\"children\":\"React Server Components Payloads\"}],[\"$\",\"meta\",\"3\",{\"name\":\"description\",\"content\":\"By Ed Spencer - edspencer.net\"}],[\"$\",\"link\",\"4\",{\"rel\":\"icon\",\"href\":\"/favicon.ico\",\"type\":\"image/x-icon\",\"sizes\":\"16x16\"}],[\"$\",\"meta\",\"5\",{\"name\":\"next-size-adjust\"}]]\n4:null\n"])</script>
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