I’m currently using uiwjs/react-codemirror for a project, and needed to add a custom binding to cmd+enter

The documentation didn’t quite show what I needed, but with the following you can bind custom keys

import React from 'react';
import CodeMirror from '@uiw/react-codemirror';
import { keymap } from '@codemirror/view';
import { defaultKeymap } from '@codemirror/commands';

const MyCodeEditor = () => {
const handleCmdEnter = React.useCallback((view) => {
console.log('Cmd+Enter pressed!');
return true;
}, []);

const customKeymap = keymap.of([
{
key: 'Mod-Enter',
run: handleCmdEnter,
},
]);

return (
<CodeMirror
value="code and stuff"
extensions={[customKeymap]}
/>
);
};

export default MyCodeEditor;

Note that you may need to ensure your keymap extension is listed before other extensions, otherwise it may be handled too soon.—