javascript - Formatting code with <pre> tag in React and JSX

Question

I am trying to use the pre tag inside of JSX.When you use the pre tag in JSX, it doesn't format at all. Why? In order to use the pre tag I need to do something like this:

const someCodeIWantToFormat = "var foo = 1"
const preBlock = { __html: "<pre>" + pythonCode + "</pre>" };
return(
  <div dangerouslySetInnerHTML={ preBlock } />;
)

Why?

question from:https://stackoverflow.com/questions/37847885/formatting-code-with-pre-tag-in-react-and-jsx

Answer 1

Use template literals

Template literals allow the use of multi-line strings which preserve leading/trailing white-space and new lines.

class SomeComponent extends React.Component {
   render() {
        return (
          <pre>{`
            Hello   ,   
            World   .
          `}</pre>
        )
    }
}

class SomeComponent extends React.Component {
   render() {
        return (
          <pre>{`
            Hello   ,   
            World   .
          `}</pre>
        )
    }
}

ReactDOM.render(
  <SomeComponent />, 
  document.getElementById('pre')
)

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react-dom.min.js"></script>

<!-- The content rendered into this tag should match the content below. -->
<div id="pre"></div>

<pre>
            Hello   ,
            World   .
</pre>