Javascript using I have some folder structure tree json need to add multiple children inside another dynamically Need to complete in one hour

I have some folder structure tree json need to add multiple children inside another dynamically example i have these json: let ob = [{data:{ check: false, kind: "dir", modified: "12/09/2020", name: "pdfstore",… (Budget: ?150 – ?151 INR, Jobs: JavaScript, JSON, Node.js)