From c291378bdd6ab2cca6a087568e62780f73dffc7a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Allan=20Magalh=C3=A3es?= <allanjomagsm@gmail.com>
Date: Thu, 26 May 2022 11:46:42 -0300
Subject: [PATCH] =?UTF-8?q?constru=C3=A7=C3=A3o=20do=20algoritmo=20validad?=
 =?UTF-8?q?or=20de=20CPF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 index.html |  8 ++++----
 script.js  | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 script.js

diff --git a/index.html b/index.html
index 0c1f7b4..f6c7cde 100644
--- a/index.html
+++ b/index.html
@@ -34,12 +34,12 @@ <h1 class="page-header">Validador de CPF</h1>
             <div class="form-group">
                 <div class="input-group input-group-lg">
                     <span class="input-group-addon" id="sizing-addon1">CPF</span>
-                    <input type="text" class="form-control" placeholder="Digite o cpf para validação ..."
-                        aria-describedby="sizing-addon1">
+                    <input id="cpf_digitado" type="text" class="form-control"
+                        placeholder="Digite o cpf para validação ..." aria-describedby="sizing-addon1">
                 </div>
                 <small class="form-text text-muted">Digite somente numeros</small>
             </div>
-            <button type="button" class="btn btn-info">Validar !</button>
+            <button type="button" class="btn btn-info" onclick="validacao()">Validar !</button>
         </form>
     </div>
     <div class="container page-header">
@@ -60,6 +60,6 @@ <h1 class="page-header">Validador de CPF</h1>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" crossorigin="anonymous"
     integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"></script>
 
-
+<script src="./script.js"></script>
 
 </html>
\ No newline at end of file
diff --git a/script.js b/script.js
new file mode 100644
index 0000000..f696162
--- /dev/null
+++ b/script.js
@@ -0,0 +1,57 @@
+function validaCPF(cpf) {
+
+    if (cpf.length != 11) {
+        return false;
+    } else {
+
+        var numeros = cpf.substring(0, 9);
+
+        var digitos = cpf.substring(9);
+
+        var soma = 0;
+        for (var i = 10; i > 1; i--) {
+            soma += numeros.charAt(10 - i) * i;
+        }
+
+        var resultado = (soma % 11) < 2 ? 0 : 11 - (soma % 11);
+
+        // validação do primeiro dígito
+
+        if (resultado != digitos.charAt(0)) {
+            return false;
+        }
+
+        soma = 0;
+        numeros = cpf.substring(0, 10);
+
+        for (var j = 11; j > 1; j--) {
+            soma += numeros.charAt(11 - j) * j;
+        }
+
+        resultado = soma % 11 < 2 ? 0 : 11 - (soma % 11);
+
+        //validação do segundo dígito
+
+        if (resultado != digitos.charAt(1)) {
+            return false;
+        }
+
+        return true;
+    }
+}
+
+function validacao() {
+    console.log('Iniciando uma validação CPF');
+    document.getElementById('success').style.display = 'none';
+    document.getElementById('error').style.display = 'none';
+
+    var cpf = document.getElementById("cpf_digitado").value;
+
+    var resultadovalidacao = validaCPF(cpf);
+
+    if (resultadovalidacao) {
+        document.getElementById('success').style.display = 'block';
+    } else {
+        document.getElementById('error').style.display = 'block';
+    }
+}
\ No newline at end of file