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node_modules/vant/es/utils/validate/date.js

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+import { isNaN } from './number';
+export function isDate(val) {
+  return Object.prototype.toString.call(val) === '[object Date]' && !isNaN(val.getTime());
+}

node_modules/vant/es/utils/validate/email.js

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+/* eslint-disable */
+export function isEmail(value) {
+  var reg = /^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$/;
+  return reg.test(value.trim());
+}

node_modules/vant/es/utils/validate/mobile.js

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+export function isMobile(value) {
+  value = value.replace(/[^-|\d]/g, '');
+  return /^((\+86)|(86))?(1)\d{10}$/.test(value) || /^0[0-9-]{10,13}$/.test(value);
+}

node_modules/vant/es/utils/validate/number.js

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+export function isNumeric(val) {
+  return /^\d+(\.\d+)?$/.test(val);
+}
+export function isNaN(val) {
+  if (Number.isNaN) {
+    return Number.isNaN(val);
+  } // eslint-disable-next-line no-self-compare
+
+
+  return val !== val;
+}

node_modules/vant/es/utils/validate/system.js

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+import { isServer } from '..';
+export function isAndroid() {
+  /* istanbul ignore next */
+  return isServer ? false : /android/.test(navigator.userAgent.toLowerCase());
+}
+export function isIOS() {
+  /* istanbul ignore next */
+  return isServer ? false : /ios|iphone|ipad|ipod/.test(navigator.userAgent.toLowerCase());
+}