How to create a tag in react-codemirror

[fanwww]

The original text content is 'a [tag] in codemirror'

Encountering [xxx] will match the content inside xxx and become a tag

[jaywcjlove]

It seems you’re trying to create custom syntax highlighting for CodeMirror v6. Specifically, you want to recognize text like [tag] and highlight it as a tag.

In CodeMirror v6, you can achieve this by defining a custom language mode or syntax highlighting rule. Here’s a basic example to implement this:

1. Define a custom syntax highlighting pattern:
   • Use CodeMirror’s language plugins to define your pattern, such as detecting a tag.
2. Match text like [xxx] using regular expressions:
   • You can use regular expressions to match text within square brackets and apply specific styles to it.
3. Bind the custom language mode to your CodeMirror instance:
   • When initializing the CodeMirror editor, bind the custom syntax highlighting to the editor instance.

Here’s a simple implementation:

import { HighlightStyle, tags } from '@codemirror/highlight';

// Define a regex pattern to match tags like [tag]
const tagRegex = /\[([^\]]+)\]/g;

// Create custom highlighting styles
const customHighlight = HighlightStyle.define([
  { tag: tags.keyword, regex: tagRegex, class: "custom-tag" }, // Apply custom class for matched tags
]);