JSFiddle - React, Tailwind, and code Playground

JavaScript

var data  = {
   "101":{"my":"1", "u":"4", "s":false, "isChecked":true},
   "102":{"my":"2", "u":"4", "s":false, "isChecked":false},
   "1000":{"my":"999", "u":"888", "s":true, "isChecked":true}
}

for (var key in data) {
    alert(key + ':' + data[key].isChecked);
}