javascript - JS equivalent for jQuery one()

Question

Can someone point me towards a solution for the following? I'm trying to find a JS equivalent for this jQuery code:

var formSelector = 'my selector here';
var attribute = 'name';
var formHistory = [];

$(formSelector).one('focusout', function(e) {
    formHistory.push(e['target'].getAttribute(attribute));
});

Answer 1

Update

In most browsers you can now pass in once: true in an options object:

document.getElementById('btn').addEventListener('click', () => {
  console.log('Hello and goodbye');
}, {
  once: true,
});

<button id="btn">Click me</button>