p Hi!
    span.showName
label Name
input.name(type="text")
button#save Save

*
    line-height: 1.2rem
    text-align: center

let btnSave = document.querySelector('#save')
let btnRemove = document.querySelector('#remove')

function saveName(){
    let dataName = document.querySelector('.name').value
    localStorage.setItem('userName', dataName)
}
function showName(){
    let nameDom = document.querySelector('.showName')
    nameDom.innerHTML = localStorage.getItem('userName')
}

showName();

btnSave.addEventListener('click', function(){
    saveName();
    showName();
})