Create one time event handler

Written byPhuoc Nguyen

#1. Use the once option

When attach a handler to given event, you can pass `{ once: true }` to the last parameter of the `addEventListener` method:

const handler = function (e) {
    // The event handler
};

ele.addEventListener('event-name', handler, { once: true });

Note that this option isn't supported in IE.

#2. Self-remove the handler

const handler = function (e) {
    // The event handler
    // Do something ...

    // Remove the handler
    e.target.removeEventListener(e.type, handler);
};

ele.addEventListener('event-name', handler);

#Use case

Show a custom context menu at clicked position

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Phước Nguyễn