Method constructor

packages/markmap-cli/src/util/dev-server.ts:107–114

(
    key: string,
    readonly filePath: string,
    watch: (callback: () => void) => () => void,
  )

  implements IContentProvider
{
  constructor(
    key: string,
    readonly filePath: string,
    watch: (callback: () => void) => () => void,
  ) {
    super(key);
    this.disposeList.push(watch(() => this.update()));
  }

  async update() {
    const content = await readFile(this.filePath, 'utf8');