Dear Sir,
I am a senior full stack developer with 6+ years of web development experience and I am well-versed in many frameworks as well as various technologies.
I've checked your attached files and I can implement this tree component using functional component.
Especially, I have rich experience in javascript frameworks such as ReactJS(Functional Component, Class Component, Styled Component, Material UI, React-Redux, Redux-Saga, React + Typescript, Apollo GraphQL, Babel, Webpack, ESLint), VueJS, NodeJS, Angular2+, HTML5, CSS3, javascript, jQuery and Bootstrap4.
I am pretty confident that I can help you achieve outstanding results.
I look forward to hearing from you.