What Is Monaco in Scripting?


Heather Bennett

Monaco is a powerful code editor used for web-based applications. It provides developers with a feature-rich and customizable environment for writing, editing, and debugging code. Monaco was developed by Microsoft and is widely used in various programming languages, including JavaScript, TypeScript, and HTML.

Features of Monaco

  • Syntax Highlighting: Monaco highlights different elements of the code with different colors to improve readability. This makes it easier for developers to identify keywords, variables, functions, and other important parts of the code.
  • IntelliSense: Monaco provides intelligent code completion suggestions as you type. It analyzes the context and suggests relevant options for variables, functions, properties, and more. This feature saves time and helps prevent typos and syntax errors.
  • Code Navigation: With Monaco’s built-in features like Go to Definition and Find All References, developers can easily navigate through their codebase. These navigation tools help in understanding the structure of the code and quickly jumping between different parts of it.
  • Error Checking: Monaco automatically detects errors in the code in real-time. It underlines the problematic sections and provides error messages or warnings to assist developers in identifying and fixing issues.
  • Code Formatting: Monaco supports automatic formatting of code according to predefined rules or custom configurations. It helps maintain consistent coding styles throughout a project by automatically indenting lines, adding or removing spaces, etc.
  • Built-in Terminal: Monaco includes an integrated terminal that allows developers to execute commands without leaving the editor. This eliminates the need to switch between multiple applications during development.

Using Monaco in Your Web Application

To integrate Monaco into your web application, you can include the necessary JavaScript and CSS files. These files can be obtained from the official Monaco repository or via package managers like npm.

Once you have included the required files, you can create a container element in your HTML where Monaco will be rendered. This can be a <div> or any other suitable element.

<!DOCTYPE html>
  <title>Monaco Editor Example</title>
  <link rel="stylesheet" href="path/to/monaco.css" />
  <div id="editorContainer"></div>

  <script src="path/to/monaco.js"></script>
  <script type="text/javascript">
    var editor = monaco.editor.create(document.getElementById('editorContainer'), {
        value: 'function hello() {\n    console.log("Hello, world!");\n}',
        language: 'javascript'

In the above example, we create an instance of the Monaco editor by calling the monaco.create() method. We pass in the container element and provide initial configuration options such as the default value of the code and the programming language (in this case, JavaScript).

Customizing Monaco

Monaco provides a wide range of customization options to tailor it according to your needs. You can modify themes, change keybindings, add extensions, and more.

To change the theme of Monaco editor, you can use the monaco.setTheme() method. You can choose from the available themes or create your own custom theme.

<script type="text/javascript">

Monaco also supports various extensions that enhance its functionality. You can find a variety of extensions in the Visual Studio Code marketplace and integrate them into your Monaco editor.


Monaco is a versatile and powerful code editor that provides an excellent development experience for web-based applications. With its rich set of features, developers can write, edit, and debug code more efficiently and effectively.

By leveraging Monaco’s syntax highlighting, IntelliSense, code navigation, error checking, and other functionalities, developers can streamline their workflow and produce high-quality code with fewer errors.

So if you are looking for a robust code editor for your web application, give Monaco a try!

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