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console.log once

Last updated at Posted at 2014-03-06

requestAnimationFrameなどで大量にループを実行させる時、初回のみconsole.logを実行したい場合がある。
そんな時は下記のように記述すればよい。

JavaScript
(function frame() {
  !opener++ && console.log("log this once");
  requestAnimationFrame(frame);
})();

Shorthand Javascript Console Log Once

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