\n \n \n \n",[],[89,121],"9d74c19a-8103-4a7c-8fe7-18861e8f3af2","favicon.svg","019edd23-0ddd-751d-902d-ea6c71a577ca",["D",1781826522514],"\n",[],[89,129],"3fccb2b9-cc23-4381-a4b7-107f05e9dd4b","components","019edd23-0ddd-751d-902d-e5faff4c1807",["D",1781826522514],[141],[89,136],{"_35":142,"_13":143,"_64":144,"_66":137,"_67":68,"_69":33,"_71":72,"_37":145,"_17":70,"_75":116,"_77":146,"_79":50,"_80":-5,"_98":147,"_18":148},"33a6e1a7-f159-4132-94fe-736c5a249f2c","App.tsx","019edd23-0ddd-751d-902d-dc9f843c6e0b",["D",1781826563947],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useRef, useState } from \"https://esm.sh/react@18.2.0\";\n\nconst GAME_SECONDS = 60;\nconst randInt = (min: number, max: number) => Math.floor(Math.random() * (max - min + 1)) + min;\nconst newQuestion = () => ({ a: randInt(2, 12), b: randInt(6, 100) });\n\ntype Phase = \"idle\" | \"playing\" | \"done\";\n\nexport function App() {\n const [phase, setPhase] = useState(\"idle\");\n const [timeLeft, setTimeLeft] = useState(GAME_SECONDS);\n const [question, setQuestion] = useState(newQuestion);\n const [answer, setAnswer] = useState(\"\");\n const [correct, setCorrect] = useState(0);\n const [wrong, setWrong] = useState(0);\n const [best, setBest] = useState(0);\n const [flash, setFlash] = useState<\"ok\" | \"no\" | null>(null);\n const inputRef = useRef(null);\n\n useEffect(() => {\n setBest(Number(localStorage.getItem(\"mult-best\") || 0));\n }, []);\n\n // Countdown timer\n useEffect(() => {\n if (phase !== \"playing\") return;\n if (timeLeft <= 0) {\n setPhase(\"done\");\n return;\n }\n const id = setTimeout(() => setTimeLeft((t) => t - 1), 1000);\n return () => clearTimeout(id);\n }, [phase, timeLeft]);\n\n // Save best score when a game ends\n useEffect(() => {\n if (phase === \"done\" && correct > best) {\n setBest(correct);\n localStorage.setItem(\"mult-best\", String(correct));\n }\n }, [phase]);\n\n // Keep the input focused while playing\n useEffect(() => {\n if (phase === \"playing\") inputRef.current?.focus();\n }, [phase, question]);\n\n function start() {\n setCorrect(0);\n setWrong(0);\n setTimeLeft(GAME_SECONDS);\n setAnswer(\"\");\n setQuestion(newQuestion());\n setPhase(\"playing\");\n }\n\n function submit(e: React.FormEvent) {\n e.preventDefault();\n if (answer.trim() === \"\") return;\n const isRight = Number(answer) === question.a * question.b;\n if (isRight) {\n setCorrect((c) => c + 1);\n setFlash(\"ok\");\n } else {\n setWrong((w) => w + 1);\n setFlash(\"no\");\n }\n setTimeout(() => setFlash(null), 250);\n setAnswer(\"\");\n setQuestion(newQuestion());\n }\n\n const pct = (timeLeft / GAME_SECONDS) * 100;\n const flashRing = flash === \"ok\"\n ? \"ring-4 ring-green-400\"\n : flash === \"no\"\n ? \"ring-4 ring-red-400\"\n : \"ring-1 ring-gray-200\";\n\n return (\n

✖️ Multiplication Sprint

\n 60 seconds. As many as you can. a (2–12) × b (6–100).\n

\n\n {phase === \"idle\" && (\n

Best score: {best}

\n \n Start game\n \n

\n )}\n\n {phase === \"playing\" && (\n

\n ✓ {correct}\n {timeLeft}s\n ✗ {wrong}\n

\n \n

\n\n

\n {question.a} × {question.b}\n

\n\n

\n )}\n\n {phase === \"done\" && (\n

Time's up!

{correct}

correct answers

\n {wrong} wrong · best: {Math.max(best, correct)}\n

\n \n Play again\n \n

\n )}\n

\n\n

\n View source\n

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Code