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@lexical/headless

This package allows you to use interact with Lexical in a headless environment (one that does not rely on DOM, e.g. for Node.js environment), and use its main features like editor.update(), editor.registerNodeTransform(), editor.registerUpdateListener() to create, update or traverse state.

const { createHeadlessEditor } = require('@lexical/headless');

const editor = createHeadlessEditor({
nodes: [],
onError: () => {},
});

editor.update(() => {
$getRoot().append(
$createParagraphNode().append(
$createTextNode('Hello world')
)
)
});

Any plugins that do not rely on DOM could also be used. Here's an example of how you can convert lexical editor state to markdown on server:

const { createHeadlessEditor } = require('@lexical/headless');
const { $convertToMarkdownString, TRANSFORMERS } = require('@lexical/markdown');

app.get('article/:id/markdown', await (req, res) => {
const editor = createHeadlessEditor({
nodes: [],
onError: () => {},
});

const articleEditorStateJSON = await loadArticleBody(req.query.id);
editor.setEditorState(editor.parseEditorState(articleEditorStateJSON));

editor.update(() => {
const markdown = $convertToMarkdownString(TRANSFORMERS);
res.send(markdown);
});
});