Here [1] is a working sample showing how to register a completion item provider for a language. The monaco-typescript [2] plugin shows how a lot of the languag

Here [1] is a working sample showing how to register a completion item provider for a language. The monaco-typescript [2] plugin shows how a lot of the language API can be used. [1] https://microsoft.github.io/monaco-editor/playground.html#extending-language-services-custom-languages https://microsoft.github.io/monaco-editor/playground.html#ex... [2] https://github.com/Microsoft/monaco-typescript/blob/master/src/mode.ts#L44 https://github.com/Microsoft/monaco-typescript/blob/master/s...