A Code field type
Code Field is a Craft CMS field type that uses the craft-code-editor package to provide a modern code editor for content authors.
Code Field uses the Monaco editor that leverages the same core code that the popular VS Code editor uses.
Themes & Code
That means it provides code highlighting, syntax checking, and autocompletion for over 80 languages.
It also has light, dark, and high contrast themes that can be chosen on a per-field basis.
It also sports as a variety of editor options such as font size, line numbers, code folding, and more.