05 React使用classnames控制样式

npm install classnames

例子：

import classNames from 'classnames';

// 用法1：传递多个类名
const classes = classNames('foo', 'bar', 'baz');
// 结果: 'foo bar baz'

// 用法2：传递对象，根据条件来选择添加类名
const isActive = true;
const classes = classNames('button', { 'active': isActive });
// 结果: 'button active'

// 用法3：传递数组
const additionalClasses = ['btn', 'btn-primary'];
const classes = classNames('button', additionalClasses);
// 结果: 'button btn btn-primary'

React 例子

// App.js

import React, {useState} from 'react';
import classNames from 'classnames';
import styles from './App.module.css'

// MyComponent.js
function MyComponent({isActive}) {
    const buttonClasses = classNames('button', {
        [styles.active]: isActive,
    });

    return (
        <button className={buttonClasses}>Active Button</button>
    );
}

function App() {
    const [isActive, setIsActive] = useState(false);

    const toggleActive = () => {
        setIsActive(!isActive);
    };

    return (
        <div className="App">
            <h1>Example App</h1>
            <MyComponent isActive={isActive}/>
            <button onClick={toggleActive}>Toggle Active</button>
        </div>
    );
}

export default App;