From 6ac746f4fdeb7692c03cf4b0a51aaecb6685d9cf Mon Sep 17 00:00:00 2001
From: xjq <lebnizjoan@gmail.com>
Date: Sat, 19 Nov 2022 22:22:21 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=96=B0=E5=A2=9E=20IP=20=E5=9C=B0?=
 =?UTF-8?q?=E5=9D=80=E5=90=88=E6=B3=95=E6=80=A7=E9=AA=8C=E8=AF=81=E9=A2=98?=
 =?UTF-8?q?=E7=9B=AE?=
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---
 question/FrontEnd/ipAddress/answer.md  | 11 +++++
 question/FrontEnd/ipAddress/answer.mjs |  5 +++
 question/FrontEnd/ipAddress/index.md   | 59 ++++++++++++++++++++++++++
 question/FrontEnd/ipAddress/index.mjs  | 12 ++++++
 question/FrontEnd/ipAddress/test.mjs   | 31 ++++++++++++++
 question/FrontEnd/template/index.md    |  6 +++
 6 files changed, 124 insertions(+)
 create mode 100644 question/FrontEnd/ipAddress/answer.md
 create mode 100644 question/FrontEnd/ipAddress/answer.mjs
 create mode 100644 question/FrontEnd/ipAddress/index.md
 create mode 100644 question/FrontEnd/ipAddress/index.mjs
 create mode 100644 question/FrontEnd/ipAddress/test.mjs

diff --git a/question/FrontEnd/ipAddress/answer.md b/question/FrontEnd/ipAddress/answer.md
new file mode 100644
index 0000000..fc6e500
--- /dev/null
+++ b/question/FrontEnd/ipAddress/answer.md
@@ -0,0 +1,11 @@
+### 方法一
+
+正则表达式
+
+```js
+export default function isIp(ip) {
+  return /^((2(5[0-5]|[0-4]\d)|1\d{2}|\d{1,2})\.){3}(2(5[0-5]|[0-4]\d)|1\d{2}|\d{1,2})$/.test(
+    ip
+  );
+}
+```
diff --git a/question/FrontEnd/ipAddress/answer.mjs b/question/FrontEnd/ipAddress/answer.mjs
new file mode 100644
index 0000000..0b3f27e
--- /dev/null
+++ b/question/FrontEnd/ipAddress/answer.mjs
@@ -0,0 +1,5 @@
+export default function f(ip) {
+  return /((2(5[0-4]|[0-4]\d)|1\d{2}|\d{1,2})\.){3}(2(5[0-4]|[0-4]\d)|1\d{2}|\d{1,2})/.test(
+    ip
+  );
+}
diff --git a/question/FrontEnd/ipAddress/index.md b/question/FrontEnd/ipAddress/index.md
new file mode 100644
index 0000000..3383b6c
--- /dev/null
+++ b/question/FrontEnd/ipAddress/index.md
@@ -0,0 +1,59 @@
+验证 IP 地址合法性
+
+一个合法的 IP 地址 在 0.0.0.0 ~ 255.255.255.255 的范围
+
+具体的 IP 地址 分类
+
+- A 类 IP 地址 范围 0.0.0.0 ~ 127.255.255.255
+- B 类 IP 地址 范围 128.0.0.0 ~ 191.255.255.255
+- C 类 IP 地址 范围 192.0.0.0 ~ 223.255.255.255
+- D 类 Ip 地址 范围 224.0.0.0 ~ 239.255.255.255
+- E 类 IP 地址 范围 240.0.0.0 ~ 255.255.255.255
+
+用例 1:
+
+```js
+const ip = '192.168.1.1';
+
+isIp(ip); // true
+```
+
+用例 2:
+
+```js
+const ip = '127.0.0.1';
+
+isIp(ip); // true
+```
+
+用例 3:
+
+```js
+const ip = '254.254.254.256';
+
+isIp(ip); // false
+```
+
+用例 4:
+
+```js
+const ip = '255.255.255.255';
+
+isIp(ip); // true
+```
+
+用例 5:
+
+```js
+const ip = '0.0.0.0';
+
+isIp(ip); // true
+```
+
+用例 6:
+
+```js
+const ip = '192.168.1.-1';
+
+isIp(ip); // false
+```
diff --git a/question/FrontEnd/ipAddress/index.mjs b/question/FrontEnd/ipAddress/index.mjs
new file mode 100644
index 0000000..4837a51
--- /dev/null
+++ b/question/FrontEnd/ipAddress/index.mjs
@@ -0,0 +1,12 @@
+/**
+ * 判断 IP 地址是否合法
+ *
+ * @export
+ * @param {string} ip
+ * @return {boolean}
+ */
+export default function isIp(ip) {
+  return /^((2(5[0-5]|[0-4]\d)|1\d{2}|\d{1,2})\.){3}(2(5[0-5]|[0-4]\d)|1\d{2}|\d{1,2})$/.test(
+    ip
+  );
+}
diff --git a/question/FrontEnd/ipAddress/test.mjs b/question/FrontEnd/ipAddress/test.mjs
new file mode 100644
index 0000000..ac9c81d
--- /dev/null
+++ b/question/FrontEnd/ipAddress/test.mjs
@@ -0,0 +1,31 @@
+import f from './index.mjs';
+import { it } from 'mocha';
+import { assert } from 'chai';
+
+it('用例 1: 输入 127.0.0.1', () => {
+  assert.deepEqual(f('127.0.0.1'), true);
+});
+
+it('用例 2: 输入 192.168.1.1', () => {
+  assert.deepEqual(f('192.168.1.1'), true);
+});
+
+it('用例 3: 输入 0.0.0.0', () => {
+  assert.deepEqual(f('0.0.0.0'), true);
+});
+
+it('用例 4: 输入 254.254.254.256', () => {
+  assert.deepEqual(f('254.254.254.256'), false);
+});
+
+it('用例 5: 输入 255.255.255.255', () => {
+  assert.deepEqual(f('255.255.255.255'), true);
+});
+
+it('用例 6: 输入 192.168.1.-1', () => {
+  assert.deepEqual(f('192.168.1.-1'), false);
+});
+
+it('用例 7: 输入 192.168.1.260', () => {
+  assert.deepEqual(f('192.168.1.260'), false);
+});
diff --git a/question/FrontEnd/template/index.md b/question/FrontEnd/template/index.md
index c03849c..8013e55 100644
--- a/question/FrontEnd/template/index.md
+++ b/question/FrontEnd/template/index.md
@@ -11,3 +11,9 @@
 ```js
 
 ```
+
+用例 3:
+
+```js
+
+```