@tidbcloud/codemirror-extension-events

2 normal kinds of codemirror event listener: doc change, selection change

• onDocChange: triggered when doc changes
• onSelectionChange: triggered when selection changes

Installation

npm install @tidbcloud/codemirror-extension-events

You need to install its peer dependencies as well:

npm install @codemirror/view @codemirror/state

Usage

import { EditorView } from '@codemirror/view'
import { EditorState } from '@codemirror/state'
import {
  onDocChange,
  onSelectionChange,
  SelectionRange
} from '@tidbcloud/codemirror-extension-events'

const docChangeHandler = (view: EditorView, state: EditorState, doc: string) => {
  console.log(doc)
}

const selectionChangeHandler = (view: EditorView, state: EditorState, ranges: SelectionRange[]) => {
  console.log(ranges)
}

const editorView = new EditorView({
  state: EditorState.create({
    doc,
    extensions: [
      onDocChange(docChangeHandler),
      onSelectionChange(selectionChangeHandler)
    ]
  })
})

API

type DocChangeHandler = (view: EditorView, state: EditorState, content: string) => void
function onDocChange(handler: DocChangeHandler): Extension

type SelectionRange = {
  from: number
  to: number
}
type SelectionChangeHandler = (
  view: EditorView,
  state: EditorState,
  selRanges: SelectionRange[]
) => void
function onSelectionChange(handler: SelectionChangeHandler): Extension