Editor

[ije]

Architecture

The editor is a plugable system for the File component. It provides:

• Text Editing
• Selection management
• History (undo, redo)
• Search
• Quick Edit
• Automatic Indentation

The editor adds the contenteditable property to the code line element, that supports native web selection and editing features on mobile phone.

const contentEl = fileContainer.shadowRoot.querySelector("[data-content]")
contentEl.contentEditable = true
contentEl.addEventListener("beforeInput", handleInput)

Selections are created via the native web selection API, multiple cursors has been supported.

document.addEventListener('selectionchange', () => {
  const selectionRaw = document.getSelection();
  const composedRanges = selectionRaw?.getComposedRanges({
    shadowRoots: [fileContainerShadowRoot],
  });
  const selection = convertSelection(composedRanges);
  if (selection) {
    // Text in the editor has been selected.
    // You can now get the `start.line`, `start.column`, `end.line` and `end.column` from the selection
  }
})

API

Vanilla JS:

import { VirtualizedFile } from "@pierre/diffs"
import { Editor } from "@pierre/diffs/editor"

// render a file
const fileInstance = new VirtualizedFile({ ... });
fileInstance.render({ ... });

// make the file editable
const editor = new Editor({
  onChange: (file, lineAnnotations) => console.log("change", file.name, file.contents)
})
const dispose  = editor.edit(fileInstance)
dispose() // or call `editor.cleanUp()`

lazy import (recommended):

import { VirtualizedFile } from "@pierre/diffs"

// render a file
const fileInstance = new VirtualizedFile({ ... });
fileInstance.render({ ... });

const edit = async (file: File) => {
  const { Editor } = await import("@pierre/diffs/editor")
  const editor = new Editor({
    onChange: (file, lineAnnotations) => console.log("change", file.name, file.contents)
  })
  return editor.edit(file)
}

// click to edit (lazy importing the editor.js)
button.addEventListener("click", () => void edit(fileInstance))

React:

import { Editor } from "@pierre/diffs"
import {
  type FileContents,
  File,
  EditorProvider,
} from '@pierre/diffs/react';

const file: FileContents = {
  name: 'example.ts',
  contents: `function greet(name: string) {
  console.log(\`Hello, \${name}!\`);
}

export { greet };`,
};

const editor = new Editor({
  onChange: (file, lineAnnotations) => console.log("change", file.name, file.contents)
})

export function EditCodeFile() {
  const [editable, setEditable] = useState(true)
  return (
    <EditorProvider editor={editor}>
      <File
        file={file}
        options={{
          theme: { dark: 'pierre-dark', light: 'pierre-light' },
        }}
        editable={editable}
      />
    </EditorProvider>
  );
}

TODOS

• Basic editing
• Selection & cursor
• Multiple cursors (Pressing ⌘)
• History(undo/redo)
• Search
• Quick Edit
• Automatic indentation
• Shortcuts
  • 'selectAll' ⌘ + A
  • 'copy' ⌘ + C
  • 'cut' ⌘ + X
  • 'paste' ⌘ + V/Y
  • 'findNextMatch' ⌘ + D
  • 'indent' Tab
  • 'outdent' Shift + Tab
  • 'moveCursorToDocStart' ⌘ + ↑
  • 'moveCursorToDocEnd' ⌘ + ↓
  • 'expandSelectionDocStart' ⌘ + Shift + ↑
  • 'expandSelectionDocEnd' ⌘ + Shift + ↓
  • 'undo' ⌘ + Z
  • 'redo' ⌘ + Shift + Z
• Browser compatibility
  • Chrome
  • Firefox
  • Safari
  • Android Chrome
  • iOS Safari
• LSP next version

[vercel]

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The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
pierrejs-diff-demo	Ready	Preview	May 21, 2026 12:23am
pierrejs-docs	Ready	Preview	May 21, 2026 12:23am

[Copilot]

Pull request overview

Copilot reviewed 50 out of 51 changed files in this pull request and generated 6 comments.

Comments suppressed due to low confidence (1)

packages/diffs/src/editor/css.ts:106

• This color-mix() value is missing the comma between color stops, making the box-shadow value invalid and causing the search panel shadow to be ignored. Add the comma between the foreground and background color stops.

    box-shadow: 0 0 12px 0 color-mix(in lab, var(--diffs-fg) 16% var(--diffs-bg));