@codemirror/autocomplete 

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This package implements autocompletion for the
CodeMirror code editor.

The project page has more information, a
number of examples and the
documentation.

This code is released under an
MIT license.

We aim to be an inclusive, welcoming community. To make that explicit,
we have a code of
conduct that applies
to communication around the project.

Usage

``javascript
import {EditorView} from "@codemirror/view"
import {autocompletion} from "@codemirror/autocomplete"
import {jsonLanguage} from "@codemirror/lang-json"

const view = new EditorView({
parent: document.body,
extensions: [
jsonLanguage,
autocompletion(),
jsonLanguage.data.of({
autocomplete: ["id", "name", "address"]
})
]
})
``

This configuration will just complete the given words anywhere in JSON
context. Most language modules come with more refined autocompletion
built-in, but you can also write your own custom autocompletion
sources
and associate them with your language this way.