javascript - react : HTML not rendering correctly

Question

我有这个 React 组件，其主要目标是在通过 marked 将存储的广告 MarkDown 文章(.md 文件)转换为 HTML 后呈现该文章。

Articles.js

import React from 'react';
import marked from 'marked';
import './articles.css';

export default class Articles extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      articles: [],
      last_article: ""
    }
  }

  componentWillMount() {
    fetch('/last_article', {
      headers: {
        'Accept': 'text/markdown'
      }
    })
    .then(res => res.text())
    .then(txt => marked(txt))
    .then(html => {
      this.setState({
        last_article: html
      });
    });
  }

  render() {
    return (
      <div className="articles">
        {this.state.last_article}
      </div>
    );
  }

}

后端工作正常，componentWillMount 获取正确的文本并完美地转换它。但它的渲染效果是这样的:

我不是 React 专家，以前从未遇到过这个问题。

有什么建议吗？

Answer 1

使用我在下面描述的dangerouslySetInnerHTML方法。

Go through this link to see the proper documentation about dangerouslySetInnerHTML and it's side effects

class Articles extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      articles: [],
      last_article: ""
    }
  }

  componentWillMount() {
      this.setState({
        last_article: `<h1>Hello</h1>`
      });
    
  }
  
  getMarkdownText() {
    return { __html: this.state.last_article };
  }

  render() {
    return (
      <div className="articles" dangerouslySetInnerHTML={this.getMarkdownText()}/> 
      );
  }

}

ReactDOM.render(
  <Articles />,
  document.getElementById('root')
)

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

<div id="root"></div>