[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_152":153,"_154":155},"routes/_app.x.$handle.$name",{"_11":12,"_13":14,"_15":-7,"_18":19,"_17":-7,"_115":-5,"_20":116,"_22":117,"_118":119,"_120":121,"_25":122,"_24":-5,"_123":-5,"_124":-5,"_125":53,"_126":127,"_128":44,"_129":-5,"_130":-5,"_131":132},"routes/_app.x.$handle.$name.code.$",{"_11":12,"_13":14,"_15":16,"_17":-7,"_18":19,"_20":21,"_22":23,"_24":-7,"_25":26,"_27":-5,"_28":-5,"_29":-5,"_30":-5,"_31":-5},"handle","rgb","name","math-course","branchName","main","version","path","","project",{"_33":61,"_13":14,"_45":62,"_63":-5,"_64":53,"_65":66,"_67":66,"_68":69,"_70":-5,"_71":72,"_73":37,"_74":44,"_75":-5,"_76":-5,"_77":78,"_79":80,"_81":-5,"_82":-5,"_83":-5,"_84":-5,"_85":86,"_87":86,"_88":89,"_90":89,"_91":89,"_92":86,"_93":86,"_94":95,"_96":97,"_98":99,"_100":53},"tree",[56],"file","contents",[32],"upstream","pull","ahead","behind","envVars",{"_33":34,"_13":35,"_36":37,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":46,"_17":47,"_48":49,"_50":51,"_52":53,"_54":14,"_18":55},"id","e3253cdf-b5cb-4b39-ac0b-14621a584903","main.ts","fileId","91a543da-9e8c-11f1-8cb6-1607ee4eb77e","parentId","branchId","10b77b3e-35ba-455a-8ac5-3717876be520","branchVersion",16,"latest",true,"createdAt",["D",1787447344593],3,"fileType","http","content","// From Algebra to AI — Val Town host with cloud-synced progress\n// The course HTML lives in Val Town blob storage (it exceeds the 80KB per-file\n// limit for val source files). Upload it with upload-course.sh from the Mac.\n// Progress is stored in blob storage too, so every device sees the same progress.\n//\n// Routes (all require ?key=COURSE_KEY):\n// GET / serve the course with the sync adapter injected\n// POST /api/course upload/replace the course HTML (body = the HTML file)\n// GET /api/state read saved progress\n// POST /api/state write saved progress\n//\n// Setup (see Val_Town_Setup.md for the full walkthrough):\n// 1. This file is the val's HTTP entry point (main.tsx) — the only val file.\n// 2. Add an environment variable COURSE_KEY (your private password).\n// 3. Run upload-course.sh to push math-course.html into blob storage.\n// 4. Open https://YOUR-VAL-URL/?key=YOUR-COURSE-KEY\n\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst COURSE_KEY = Deno.env.get(\"COURSE_KEY\");\nconst BLOB_PREFIX = \"mathcourse-state:\";\nconst COURSE_BLOB = \"mathcourse-html\";\n\n/*ADAPTER_START*/\nconst ADAPTER = ``;\n/*ADAPTER_END*/\n\nfunction page(title: string, body: string, status = 200): Response {\n return new Response(\n \"\" +\n \"\" + title +\n \"\" +\n body + \"\",\n { status, headers: { \"content-type\": \"text/html; charset=utf-8\" } },\n );\n}\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const key = url.searchParams.get(\"key\") || \"\";\n\n if (!COURSE_KEY) {\n return page(\n \"Almost there\",\n \"

Almost there

This val needs one more thing: an environment variable named COURSE_KEY. \" +\n \"In the val's left sidebar, open Environment variables, add COURSE_KEY, and give it a private \" +\n \"password of your choosing. Then open this page again as ?key=that-password.

\",\n );\n }\n\n if (key !== COURSE_KEY) {\n return page(\n \"Locked\",\n \"

🔒 Locked

This page needs your course key in the address, like \" +\n \"?key=your-course-key. Check the bookmark you saved during setup.

\",\n 403,\n );\n }\n\n // ---- Course upload ----\n if (url.pathname === \"/api/course\") {\n if (req.method !== \"POST\") {\n return Response.json({ ok: false, error: \"method not allowed\" }, {\n status: 405,\n });\n }\n const html = await req.text();\n if (\n !html || html.indexOf(\"No course uploaded yet

The val is running, but the course file isn't in storage yet. \" +\n \"On the Mac, run upload-course.sh from the Math Course folder (see Val_Town_Setup.md), \" +\n \"then reload this page.

\",\n );\n }\n return new Response(html.replace(\"\", \"\\n\" + ADAPTER), {\n headers: { \"content-type\": \"text/html; charset=utf-8\" },\n });\n}","deleted",false,"label",[35],{"_33":34,"_13":35,"_36":37,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":57,"_17":47,"_48":49,"_50":51,"_52":53,"_54":14,"_58":59,"_18":60},["D",1787447344593],"children",[],[35],"8efef31b-017d-4367-a32d-a442c5ec4520",["D",1787446200089],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Relearner course from Algebra to Math of Machine Learning","imageUrl","userId","4c84f2ef-ab8e-44cc-ba80-40d7c3ca2664","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",0,"orgId","019ff7b1-f7ac-7549-9f99-3e4c291751ab","tursoName","tursoHostname","tursoMeasuredAt","pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_11":12,"_114":19},"org",{"_11":12,"_109":19,"_110":19,"_71":72,"_111":112,"_113":53},"branch",{"_17":42,"_13":16,"_33":40,"_101":61,"_102":-5,"_103":-5,"_104":-5,"_105":-5,"_106":-5,"_107":14,"_108":12},"isOwned","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","displayName","avatar","tier","free","canRestrictVals","profileImageUrl","adoptOrgId",{"_33":61,"_13":14,"_45":148,"_63":-5,"_64":53,"_65":66,"_67":66,"_68":69,"_70":-5,"_71":72,"_73":37,"_74":44,"_75":-5,"_76":-5,"_77":78,"_79":80,"_81":-5,"_82":-5,"_83":-5,"_84":-5,"_85":86,"_87":86,"_88":89,"_90":89,"_91":89,"_92":86,"_93":86,"_94":149,"_96":150,"_98":151,"_100":53},[145],"files",[145],"counts",{"_135":78,"_136":137,"_138":78,"_31":139,"_140":141},[133],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_33":34,"_13":35,"_36":37,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":46,"_17":47,"_48":49,"_50":51,"_52":53,"_54":14,"_18":134},[35],"pulls","branches",1,"forks",{"_142":137,"_144":78},"connections",{"_142":78,"_143":78},"count","unfilledCount","emptyCount",{"_33":34,"_13":35,"_36":37,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":57,"_17":47,"_48":49,"_50":51,"_52":53,"_54":14,"_58":146,"_18":147},[],[35],["D",1787446200089],{"_11":12,"_114":19},{"_11":12,"_109":19,"_110":19,"_71":72,"_111":112,"_113":53},{"_17":42,"_13":16,"_33":40,"_101":61,"_102":-5,"_103":-5,"_104":-5,"_105":-5,"_106":-5,"_107":14,"_108":12},"ctx",{"_94":-5,"_130":185,"_186":187,"_188":189,"_190":53,"_191":53,"_192":53,"_193":44,"_194":-5,"_195":-7,"_196":-7,"_197":78,"_198":53,"_199":53,"_200":-5,"_201":53,"_202":53,"_203":53,"_204":-5},"ENV",{"_156":157,"_158":159,"_160":16,"_161":162,"_163":164,"_165":166,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176,"_177":178,"_179":180,"_181":182,"_183":184},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Code