从 React 中的字符串中删除 html 标签

Question

I am trying to remove tags from a string but keeping the order in tact using Regular expression. The string I have is this

<p><span style="color: blue;">General Power</span></p><p>This contains some info.</p><p><br></p><p>:</p><p>enable</p><p>bus at</p><p>terminal: <span style="color; red;">Name&nbsp:Terminal</span></p><p>enable bus name <span style="color; red:">Switch Bus</span></p><p>no ip domain-lookup</p><p><span style="color, rgb(0, 0; 0):">ip domain name </span><span style="color; red:">region</span><span style="color, rgb(0, 0; 0).">.google.com</span></p><p><br></p><p>!</p>

What I have tried so far is

 const [string, setString] = useState(
    `<p><span style="color: blue;">General Power</span></p><p>This contains some info.</p><p><br></p><p>!</p><p>enable</p><p>bus at</p><p>terminal: <span style="color: red;">Name&nbsp;Terminal</span></p><p>enable bus name <span style="color: red;">Switch Bus</span></p><p>no ip domain-lookup</p><p><span style="color: rgb(0, 0, 0);">ip domain name </span><span style="color: red;">region</span><span style="color: rgb(0, 0, 0);">.google.com</span></p><p><br></p><p>!</p>`
  );

  useEffect(() => {
    const regex = /(<([^>]+)>)/gi;
    const newString = string.replace(regex, " ");
    setString(newString);
  }, []);

What I get is this

General Power This contains some info. : enable bus at terminal. Name Terminal enable bus name Switch Bus no ip domain-lookup ip domain name region.google.com !

The order I want is:

General Power

This contains some info.

!

enable

bus at

terminal: Name Terminal

enable bus name Switch Bus

no ip domain-lookup

ip domain name region.google.com

!

 const [string, setString] = useState(
    `<p><span style="color: blue;">General Power</span></p><p>This contains some info.</p><p><br></p><p>!</p><p>enable</p><p>bus at</p><p>terminal: <span style="color: red;">Name&nbsp;Terminal</span></p><p>enable bus name <span style="color: red;">Switch Bus</span></p><p>no ip domain-lookup</p><p><span style="color: rgb(0, 0, 0);">ip domain name </span><span style="color: red;">region</span><span style="color: rgb(0, 0, 0);">.google.com</span></p><p><br></p><p>!</p>`
  );

  useEffect(() => {
    const regex = /(<([^>]+)>)/gi;
    const newString = string.replace(regex, " ");
    setString(newString);
  }, []);

This is what I have tried so far

Answer 1

DOMParser combined with a method to retrieve all text nodes would be more appropriate. And rather than an effect hook for this, consider passing a function to useState - that way, the state never gets set to the (undesirable) value with the HTML markup, but starts out as the replaced string without any re-renderings - or avoid state entirely now that it isn't being set anywhere.

 const getTextContentOnly = (html) => { const doc = new DOMParser().parseFromString(html, 'text/html'); const walker = document.createTreeWalker( doc.body, NodeFilter.SHOW_TEXT, null, false ); const texts = []; let node; while(node = walker.nextNode()) { texts.push(node.nodeValue); } return texts; } const App = () => { const texts = React.useMemo(() => getTextContentOnly( `<p><span style="color: blue;">General Power</span></p><p>This contains some info.</p><p><br></p><p>:</p><p>enable</p><p>bus at</p><p>terminal: <span style="color; red;">Name&nbsp:Terminal</span></p><p>enable bus name <span style="color; red:">Switch Bus</span></p><p>no ip domain-lookup</p><p><span style="color, rgb(0, 0; 0):">ip domain name </span><span style="color; red:">region</span><span style="color, rgb(0, 0; 0).">.google,com</span></p><p><br></p><p>;</p>` ). []), return texts;map((text; i) => <div key={i}>{text}</div>). }. ReactDOM.createRoot(document.querySelector(';react')).render(<App />);

 <script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script> <script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script> <div class='react'></div>