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请求方式 资源路径 协议版本

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GET /brand/findAll?name=OPPO&status=1 HTTP/1.1

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<img src="image/1.jpg" width="80%" alt="示例图片">

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<a href="https://www.yuanshen.com/#/" target="_blank">原神官网</a>

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<form action="/login" method="post">
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    用户名：<input type="text" name="username">
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    <br><br>
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    密码：<input type="password" name="password">
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    <input type="submit" value="提交">
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</form>

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<h1 style="color: black;">标题一</h1>

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<style>
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    h1 {
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        color: red;
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    }
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</style>

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<link rel="stylesheet" href="news.css">

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h1 {
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    color: #00f;
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}

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<script>
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    alert('Hello JavaScript');
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</script>

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<script src="demo.js"></script>

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function add(a, b) {
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    return a + b;
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}

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var add = function (a, b) {
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    return a + b;
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};

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var arr1 = new Array(1, 2, 3);
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var arr2 = [1, 2, 3];

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arr2.forEach(function (item) {
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    console.log(item);
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});

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var str = 'hello';
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console.log(str.length);
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console.log(str.charAt(0));
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console.log(str.indexOf('e'));
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console.log(str.trim());
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console.log(str.substring(1, 3));

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var user = {
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    name: '张三',
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    age: 18,
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    eat: function () {
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        alert('hello');
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    }
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};
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console.log(user.name);
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user.eat();

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var user = {
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    eat() {
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        alert('hello');
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    }
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};

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var jsonStr = '{"name":"Jerry","value":1}';
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var obj = JSON.parse(jsonStr);
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var str = JSON.stringify(obj);

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<input type="button" value="提交" onclick="onSubmitClick()">
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<script>
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    function onSubmitClick() {
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        alert('提交');
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    }
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</script>

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<input type="button" value="返回" id="btn2">
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<script>
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    document.getElementById('btn2').onclick = function () {
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        alert('返回');
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    };
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</script>

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console.log(name); // undefined
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var name = '张三';

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var name;
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console.log(name);
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name = '张三';

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console.log(name); // ReferenceError
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let name = '张三';

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const fruits = ['苹果', '香蕉', '橙子'];
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fruits.forEach((fruit, index) => {
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    console.log(`${index}: ${fruit}`);
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});

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const numbers = [1, 2, 3, 4, 5];
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const doubled = numbers.map(n => n * 2);

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const numbers = [1, 2, 3, 4, 5, 6];
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const evens = numbers.filter(n => n % 2 === 0);

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const users = [
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    { id: 1, name: '张三' },
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    { id: 2, name: '李四' }
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];
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const user = users.find(u => u.id === 2);

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const numbers = [1, 2, 3, 4, 5];
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const hasEven = numbers.some(n => n % 2 === 0);
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const allPositive = numbers.every(n => n > 0);

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const numbers = [1, 2, 3, 4, 5];
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const sum = numbers.reduce((acc, num) => acc + num, 0);

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const person = { name: '张三', age: 25, city: '北京' };
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const { name, age } = person;
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const { name: userName } = person;
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const { country = '中国' } = person;

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const result = score >= 60 ? '及格' : '不及格';

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const name = userInput || '匿名用户';

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isLoggedIn && showMessage();

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const value = input ?? '默认值';

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const promise = new Promise((resolve, reject) => {
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    setTimeout(() => {
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        const success = true;
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        if (success) {
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            resolve('操作成功');
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        } else {
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            reject('操作失败');
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        }
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    }, 1000);
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});
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promise
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    .then(result => console.log(result))
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    .catch(error => console.error(error));

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async function fetchData() {
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    try {
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        const response = await fetch('https://api.example.com/users');
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        const data = await response.json();
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        console.log(data);
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    } catch (error) {
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        console.error('请求失败：', error);
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    }
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}
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fetchData();

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let anything: any = '字符串';
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anything = 123;
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anything = true;

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function sayHello(): void {
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    console.log('Hello');
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}

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function error(message: string): never {
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    throw new Error(message);
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}

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let userId: string | number;
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function add(a: number, b: number): number {
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    return a + b;
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}
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const user: {
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    name: string;
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    age: number;
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} = {
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    name: '张三',
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    age: 25
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};