diff --git a/src/assets/icons/svg/validCode.svg b/src/assets/icons/svg/validCode.svg
new file mode 100644
index 0000000..55ac795
--- /dev/null
+++ b/src/assets/icons/svg/validCode.svg
@@ -0,0 +1,14 @@
+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg t="1569580729849" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="1939"
+     width="200" height="200">
+  <defs>
+    <style type="text/css"></style>
+  </defs>
+  <path
+    d="M513.3 958.5c-142.2 0-397.9-222.1-401.6-440.5V268c1.7-39.6 31.7-72.3 71.1-77.3 49-4.6 97.1-16.5 142.7-35.3 47.8-14 91.9-38.3 129.4-71.1 30.3-24.4 72.9-26.3 105.3-4.6 39.9 30.7 83.8 55.9 130.5 74.6 48.6 14.7 98.2 25.9 148.4 33.7 38.5 7.6 67.1 40.3 69.5 79.5 3.3 84.9 2.5 169.9-2.6 254.7-33.7 281.6-253.7 436.4-392.7 436.3z m-0.1-813.7c-7.2-0.2-14.3 2-20 6.4-39.7 35.2-86.8 61.1-137.7 75.7-46.8 19.2-96.2 31-146.6 35.2-11 3.2-18.8 13-19.5 24.4v230.1c3.5 180.3 223.3 361 323.9 361s287.3-120.2 317.6-360.5c7.3-142.7 0-228.6 0-229.6-1.3-13.3-11-24.3-24-27.3-49.6-7.7-98.6-19-146.5-33.7-46.3-19.5-89.7-45.3-129-76.7-5.8-3.8-12.7-5.5-19.5-4.9l1.3-0.1z"
+    fill="#C6CCDA" p-id="1940"></path>
+  <path
+    d="M750.1 428L490.7 673.2c-11.7 11.1-29.5 12.9-43.1 4.2l-6.8-5.8-141.2-149.4c-9.3-9.3-12.7-22.9-9-35.5 3.8-12.6 14.1-22.1 27-24.8 12.9-2.7 26.1 1.9 34.6 11.9L469 597.5l233.7-221c14.6-12.8 36.8-11.6 49.9 2.7 13.2 14.2 11.5 35.3-2.5 48.8"
+    fill="#C6CCDA" p-id="1941"></path>
+</svg>
diff --git a/src/utils/validate.js b/src/utils/validate.js
new file mode 100644
index 0000000..adfa254
--- /dev/null
+++ b/src/utils/validate.js
@@ -0,0 +1,83 @@
+/**
+ * @param {string} path
+ * @returns {Boolean}
+ */
+export function isExternal(path) {
+  return /^(https?:|mailto:|tel:)/.test(path)
+}
+
+/**
+ * @param {string} str
+ * @returns {Boolean}
+ */
+export function validUsername(str) {
+  const valid_map = ['admin', 'editor']
+  return valid_map.indexOf(str.trim()) >= 0
+}
+
+/**
+ * @param {string} url
+ * @returns {Boolean}
+ */
+export function validURL(url) {
+  const reg = /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/
+  return reg.test(url)
+}
+
+/**
+ * @param {string} str
+ * @returns {Boolean}
+ */
+export function validLowerCase(str) {
+  const reg = /^[a-z]+$/
+  return reg.test(str)
+}
+
+/**
+ * @param {string} str
+ * @returns {Boolean}
+ */
+export function validUpperCase(str) {
+  const reg = /^[A-Z]+$/
+  return reg.test(str)
+}
+
+/**
+ * @param {string} str
+ * @returns {Boolean}
+ */
+export function validAlphabets(str) {
+  const reg = /^[A-Za-z]+$/
+  return reg.test(str)
+}
+
+/**
+ * @param {string} email
+ * @returns {Boolean}
+ */
+export function validEmail(email) {
+  const reg = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
+  return reg.test(email)
+}
+
+/**
+ * @param {string} str
+ * @returns {Boolean}
+ */
+export function isString(str) {
+  if (typeof str === 'string' || str instanceof String) {
+    return true
+  }
+  return false
+}
+
+/**
+ * @param {Array} arg
+ * @returns {Boolean}
+ */
+export function isArray(arg) {
+  if (typeof Array.isArray === 'undefined') {
+    return Object.prototype.toString.call(arg) === '[object Array]'
+  }
+  return Array.isArray(arg)
+}