Initial commit

2024-01-03 23:11:34 +01:00 · 2024-01-03 23:11:34 +01:00 · 50fac57116
commit 50fac57116
1 changed files with 101 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,101 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<title>CPR-nummer</title>
+		<style>
+			body {
+				text-align: center;
+				font-family: sans-serif;
+			}
+			label {
+				font-size: 1.4em;
+				font-weight: bold;
+			}
+			#input {
+				font-family: monospace;
+				width: 11ch;
+				font-size: 1.4em;
+				padding: 4px 6px;
+				margin-top: 4px;
+			}
+			#result {
+				font-size: 1.2em;
+			}
+			#result.valid {
+				color: green;
+			}
+			#result.invalid {
+				color: red;
+			}
+		</style>
+		<script>
+			window.onload = function() {
+				var input = document.getElementById("input");
+				var result = document.getElementById("result");
+				var description = document.getElementById("description");
+
+				input.onkeyup = function() {
+					// Reset
+					result.className = "";
+					result.innerText = "";
+					description.innerText = "";
+
+					// Validate
+					if (input.value.length != 11 || !input.reportValidity()) return;
+
+					// Calculate date
+					var day = parseInt(input.value.slice(0, 2));
+					var month = parseInt(input.value.slice(2, 4));
+					var year = parseInt(input.value.slice(4, 6));
+
+					// Calculate full year
+					var seventhDigit = parseInt(input.value.charAt(7));
+					if (seventhDigit < 4) year += 1900;
+					else if (seventhDigit === 4 || seventhDigit === 9) year += (year > 36 ? 1900 : 2000);
+					else if (seventhDigit < 8) year += (year > 57 ? 1900 : 2000);
+
+					// Get strings for result
+					var date = new Date(year, month - 1, day);
+					var dateString = date.toLocaleDateString("da-DK", {
+						year: "numeric",
+						month: "long",
+						day: "numeric",
+					});
+
+					var gender = parseInt(input.value.charAt(10)) % 2 === 0 ? "Kvinde" : "Mand";
+
+					// Calculate checksum
+					var factors = [4, 3, 2, 7, 6, 5, 4, 3, 2, 1];
+
+					var sum = input.value
+						.replace("-", "")
+						.split("")
+						.map(function(digit, index) {
+							return parseInt(digit) * factors[index];
+						})
+						.reduce(function(acc, val) {
+							return acc + val;
+						}, 0);
+
+					if (sum % 11 === 0) {
+						result.className = "valid";
+						result.innerText = "Gyldigt CPR-nummer";
+						description.innerHTML = "<b>Fødselsdato:</b> " + dateString + "<br><b>Køn:</b> " + gender;
+
+					} else {
+						result.className = "invalid";
+						result.innerText = "Ugyldigt CPR-nummer";
+					}
+				}
+			}
+		</script>
+	</head>
+	<body>
+		<label for="input">Indtast CPR-nummer:</label>
+		<br>
+		<input id="input" type="text" placeholder="XXXXXX-XXXX" maxlength="11" pattern="\d{6}-\d{4}" autofocus>
+		<p id="result"></p>
+		<p id="description"></p>
+	</body>
+</html>
+