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\" error\" : \"\");\n result.textContent = data.error ? \"❌ \" + data.error : expr + \" = \" + data.result;\n}\n\n(document.getElementById(\"solve\") as HTMLButtonElement).onclick = solve;\ninput.addEventListener(\"keydown\", (e) => {\n if (e.key === \"Enter\") solve();\n});\n","// Lógica da calculadora: monta a expressão pelos botões e avalia no backend.\nconst display = document.getElementById(\"display\") as HTMLInputElement;\nlet expr = \"\";\n\nfunction pretty(s: string): string {\n // Mostra símbolos bonitos; o backend entende a forma ASCII.\n return s.replace(/sqrt\\(/g, \"√(\").replace(/\\*/g, \"×\").replace(/\\//g, \"÷\");\n}\n\nfunction render(): void {\n display.value = expr ? pretty(expr) : \"0\";\n}\n\nasync function evaluate(): Promise {\n if (!expr) return;\n const res = await fetch(\"?expr=\" + encodeURIComponent(expr));\n const data = await res.json();\n if (data.error) {\n display.value = \"Erro\";\n } else {\n display.value = pretty(expr) + \" = \" + data.result;\n }\n}\n\ndocument.querySelectorAll(\"button\").forEach((btn) => {\n btn.addEventListener(\"click\", () => {\n const v = btn.dataset.v!;\n if (v === \"=\") return evaluate();\n if (v === \"C\") {\n expr = \"\";\n return render();\n }\n if (v === \"back\") {\n expr = expr.slice(0, -1);\n return render();\n }\n expr += (v === \"sqrt\") ? 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🧮 Calculadora

\n \n

\n \n \n \n \n\n \n \n \n \n\n \n \n \n \n\n \n \n \n \n\n \n \n \n \n

\n \n

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Diff · v19