const employeeList = [ { id: -1, name: "Toàn", age: 33, gender: "male" // male, female, other } ] function showList() { console.log("employeeList", employeeList) } function addNewEmployee() { let newEmployee = { id: 2, name: "Hải", age: 43, gender: "female" // male, female, other } employeeList.push(newEmployee) } function setData() { localStorage.setItem("employeeList", JSON.stringify(employeeList)) } function readData() { console.log(JSON.parse(localStorage.getItem("employeeList"))) } localStorage.setItem("myName", "Phước") console.log(localStorage.getItem("myName")) localStorage.setItem("myAge", 27) let myAge = localStorage.getItem("myAge") console.log(+myAge) setData() readData()