JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = [{"value":{"Id":"1","Text":"abcd","Parent":""},
             "children":[{"value":{"Id":"2","Text":"abcd","Parent":"1"},
                          "children":[{"value":{"Id":"3","Text":"abcd","Parent":"1"}}]
                        }]
            }];
                                       
function travel(d){
        if (d[0] && d[0].value){
          console.log(d[0].value.Id)  ;                          
        }
    if (d[0].children && typeof d[0].children == "object" ){
            travel(d[0].children);
        }
}
                                      
travel(data);