如何添加多个类到一个ReactJS组件?

我是ReactJS和JSX的新手，我对下面的代码有一个小问题。

我试图在每个li上添加多个类到className属性:

<li key={index} className={activeClass, data.class, "main-class"}></li>

我的React组件是:

var AccountMainMenu = React.createClass({
  getInitialState: function() {
    return { focused: 0 };
  },

  clicked: function(index) {
    this.setState({ focused: index });
  },

  render: function() {
    var self = this;
    var accountMenuData = [
      {
        name: "My Account",
        icon: "icon-account"
      },
      {
        name: "Messages",
        icon: "icon-message"
      },
      {
        name: "Settings",
        icon: "icon-settings"
      }
    /*{
        name:"Help &amp; Support &nbsp; <span class='font-awesome icon-support'></span>(888) 664.6261",
        listClass:"no-mobile last help-support last"
      }*/
    ];

    return (
      <div className="acc-header-wrapper clearfix">
        <ul className="acc-btns-container">
          {accountMenuData.map(function(data, index) {
            var activeClass = "";

            if (self.state.focused == index) {
              activeClass = "active";
            }

            return (
              <li
                key={index}
                className={activeClass}
                onClick={self.clicked.bind(self, index)}
              >
                <a href="#" className={data.icon}>
                  {data.name}
                </a>
              </li>
            );
          })}
        </ul>
      </div>
    );
  }
});

ReactDOM.render(<AccountMainMenu />, document.getElementById("app-container"));

当前回答

一般来说，人们喜欢

<div className={  `head ${style.class1} ${Style.class2}`  }><div>

<div className={  'head ' + style.class1 + ' ' + Style.class2 }><div>

<div className={  ['head', style.class1 , Style.class2].join(' ')  }><div>

但是您可以选择创建一个函数来完成这项工作

function joinAll(...classes) {
  return classes.join(" ")
}

然后叫它:-

<div className={joinAll('head', style.class1 , style.class2)}><div>

2021-01-21 17:04:55

其他回答

我将classNames绑定到导入到组件的css模块。

import classNames from 'classnames'; 
import * as styles from './[STYLES PATH];
const cx = classNames.bind(styles);

classnames提供了以声明的方式为React元素声明className的能力。

ex:

<div classNames={cx(styles.titleText)}> Lorem </div>

<div classNames={cx('float-left')}> Lorem </div> // global css declared without css modules
<div classNames={cx( (test === 0) ?
             styles.titleText : 
             styles.subTitleText)}>  Lorem </div> // conditionally assign classes

<div classNames={cx(styles.titleText, 'float-left')}> Lorem </div> //combine multiple classes

2018-12-27 11:14:20

只需将join(' ')函数与空格链接到数组，例如:

<p className={['alert','red',condIsTrue ? 'up' : 'down'].join(' ')}>something...</p>

2022-12-24 15:07:55

以facebook的TodoTextInput.js为例

render() {
    return (
      <input className={
        classnames({
          edit: this.props.editing,
          'new-todo': this.props.newTodo
        })}
        type="text"
        placeholder={this.props.placeholder}
        autoFocus="true"
        value={this.state.text}
        onBlur={this.handleBlur}
        onChange={this.handleChange}
        onKeyDown={this.handleSubmit} />
    )
  }

用普通的js代码替换类名将是这样的:

render() {
    return (
      <input
        className={`
          ${this.props.editing ? 'edit' : ''} ${this.props.newTodo ? 'new-todo' : ''}
        `}
        type="text"
        placeholder={this.props.placeholder}
        autoFocus="true"
        value={this.state.text}
        onBlur={this.handleBlur}
        onChange={this.handleChange}
        onKeyDown={this.handleSubmit} />
    )
  }

2017-03-30 10:19:04

要添加更多的类

... className={`${classes.hello} ${classes.hello1}`...

2019-08-19 12:21:45

这似乎对我有用

<Link className={[classes.button, classes.buttonFirst]}>

2021-03-19 04:08:43

如何添加多个类到一个ReactJS组件?

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