js how to to attach an event handler only once

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Cailin
08 Oct 2017
1document.getElementById("myelement").addEventListener("click", handler);
2
3// handler function
4function handler(e) {
5	// remove this handler
6	e.target.removeEventListener(e.type, arguments.callee);
7
8	alert("You'll only see this once!");
9}
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