included和includes区别

"included" 和 "includes" 都是动词 "include" 的不同形式。

- "included" 是过去分词式，表示在过去的某个时间或某个事件中已经包括或包括。
- "includes" 是第三人称单数形式，表示现在或将来某个时间点或某个事件中正在包括或将被包括。

例如：
- "The package included a book and a DVD."（这个包裹包括了一本书和一张DVD。）- 过去分词
- "The package includes a book and a DVD."（这个包裹包括一本书和一张DVD。）- 第三人称单数形式

总结来说，"included" 表示过去已经包括，而 "includes" 表示现在或将来正在或将要包括。

相关问题

js included

以下是JS中判断元素是否包含的方法：
1.使用includes()方法判断数组中是否包含某个元素

const arr1 = [1, 2, 3];
console.log(arr1.includes(2)); // 输出：true

2.使用includes()方法判断字符串中是否包含某个字符或字符串

const str = 'hello world';
console.log(str.includes('world')); // 输出：true

3.使用in运算符判断对象中是否包含某个属性

const obj = {a: 1, b: 2};
console.log('a' in obj); // 输出：true

js includes

JavaScript includes are code snippets or files that can be included in a webpage to add functionality, interactivity, or styling. They can be used to:

1. Add interactivity to web pages: JavaScript can be used to add interactivity to web pages, such as form validation, button clicks, or animations.

2. Manipulate the Document Object Model (DOM): JavaScript can be used to modify the structure, content, and styling of a web page.

3. Handle events: JavaScript can be used to handle events such as mouse clicks, keyboard input, or page loading.

4. Communicate with servers: JavaScript can be used to send and receive data from servers asynchronously, without reloading the page.

There are several ways to include JavaScript in a web page:

1. Inline scripts: JavaScript code can be included directly in the HTML file using the <script> tag.

2. External scripts: JavaScript code can be stored in a separate file and included in the HTML file using the <script> tag with the src attribute.

3. JavaScript libraries: JavaScript libraries are collections of pre-written code that can be included in a web page to add specific functionality, such as jQuery or React.

4. Frameworks: JavaScript frameworks are collections of libraries that provide a structure and set of conventions for building web applications, such as Angular or Vue.