diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 0000000..fbb5dc3
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,29 @@
+{
+ "parserOptions": {
+ "ecmaVersion": 6
+ },
+ "rules": {
+ "keyword-spacing": 1,
+ "space-before-function-paren": [1, "never"],
+ "eqeqeq": 1,
+ "space-infix-ops": 1,
+ "comma-spacing": 1,
+ "brace-style": 1,
+ "no-multiple-empty-lines": 1,
+ "camelcase": 1,
+ "func-call-spacing": 1,
+ "key-spacing": 1,
+ "semi": 1,
+ "no-floating-decimal": 1,
+ "no-multi-spaces": 1,
+ "object-property-newline": 1,
+ "padded-blocks": [1, "never"],
+ "space-before-blocks": 1,
+ "space-in-parens": 1,
+ "spaced-comment": 1,
+ "quotes": [1, "single"],
+ "id-length": [1, { "exceptions": ["i", "j", "x"] }],
+ "indent": [1, 2],
+ "no-array-constructor": 1
+ }
+}
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..4ddd572
--- /dev/null
+++ b/app.js
@@ -0,0 +1,23 @@
+
+function isValidCard(cardNumber) {
+ var string = cardNumber.toString();
+ cardNumber !== undefined;
+ cardNumber === parseInt(prompt('Ingrese el número de su tarjeta de crédito'));
+ var cardlength = string.length;
+ var sum = 0;
+ for (var i = 0; i < cardlength; i = i + 2) {
+ var numbers = (string.charAt(i)) * 2;
+ if (numbers >= 10) {
+ var numbersCard = numbers.toString();
+ numbers = (numbersCard.charAt(0)) + (numbersCard.charAt(1));
+ }
+ sum = sum + numbers;
+ } for (var j = 1; j < cardlength; j = j + 2) {
+ sum = sum + (string.charAt(i));
+ }
+ if (sum % 10 === 0) {
+ alert('Has ingresado un número de tarjeta correcto');
+ } else {
+ alert('Has ingresado un número de tarjeta incorrecto');
+ }
+}
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..b1560b7
--- /dev/null
+++ b/index.html
@@ -0,0 +1,12 @@
+
+
+
+
+
+
+
+
+
+