# The editor > Monaco editing, IntelliSense, diagnostics, the Diff toggle, merge conflicts, large files and inline AI completions. Last updated: October 17, 2026 Source: https://codevre.com/docs/ide/editor Codevre's editor is [Monaco](https://microsoft.github.io/monaco-editor/), the editor at the heart of VS Code. Multi-cursor editing, find and replace, folding, the minimap, bracket pair colorization and the usual keyboard shortcuts all work as you'd expect. See [Keyboard shortcuts](keyboard-shortcuts.md). ## Languages Syntax highlighting covers well over 100 languages. A few mappings worth knowing: - `.svg` opens as XML. `.vue`, `.svelte`, `.astro`, `.ejs`, `.hbs`, `.njk` and `.liquid` open as HTML. - `.mdx` opens as Markdown. `.toml`, `.ini`, `.cfg` and `.conf` open as INI. - `.glsl`, `.frag` and `.vert` open as GLSL. Python and GLSL also support **Format Document**. Markdown, images and SVG files also have viewers. The Markdown preview supports KaTeX math, footnotes, definition lists, `==mark==`, sub- and superscript, and highlighted code. ## IntelliSense JavaScript and TypeScript get completions, hover info, go to definition and errors from the TypeScript language service. - With no `tsconfig.json`, Codevre uses modern defaults: ES2022, ESNext modules, bundler resolution and `jsx: react-jsx`. - A `tsconfig.json` is honored, including `extends`, `references`, `paths` and `baseUrl`. `allowJs` is always on. - Types for **bare imports** like `import confetti from 'canvas-confetti'` are fetched from esm.sh at the installed version (or the version range in `package.json`). - Sub-projects with their own `package.json` or `tsconfig.json` (up to two folders deep) are picked up too. - CSS side-effect imports (`import './style.css'`) don't raise errors. ## Problems and diagnostics Errors and warnings from the language services appear as squiggles and in two places: - **The file's status bar** shows `⊗ errors ⚠ warnings`. Click it to open that file's **Code Diagnostics** panel; click a problem to jump to it. - **The main status bar** totals problems across all open files. Click to list the files with problems. Language servers only check files that are open, so "all files" means all open files. Files in `.git` and `node_modules` are never listed. ## The Diff toggle Click **Diff** in a file's status bar to lay an inline diff over the editor. The right-hand side is your real file, so you can keep editing and the diff updates live. Click **Diffing** to close it. Compare against: | Source | Baseline | When it's available | |---|---|---| | **Git** | The file at the last commit (`HEAD`) | The project has a Git repository. This is the default when it applies | | **Session** | The file as of your last save to Codevre | Always, unless the file was already changed before you opened it | When both apply, a switcher appears in the diff toolbar, and your choice sticks. The toolbar also has previous/next change, a side-by-side toggle and close. Related settings: | Setting | Default | Effect | |---|---|---| | `diff.renderSideBySide` | `false` | Open diffs side by side instead of inline | | `diff.gitOnly` | `false` | Only offer Git diffs; hide the Session baseline | Diffs aren't available for files in `.git` or `node_modules`, or for very large files. ## Merge conflicts When a pull leaves conflict markers in a file, CodeLens actions appear above each conflict: **Accept Current Change**, **Accept Incoming Change** and **Accept Both Changes**. See [Git and Source Control](source-control.md#merges-and-conflicts). ## Large files Very large files (multi-megabyte JSON, minified bundles) open in a lean mode: word wrap, folding, the minimap and other heavy features are turned off so typing and scrolling stay smooth. The file's status bar shows **Large file**. Diffing is disabled for them. ## Editor settings Any Monaco option can be set as `editor.