“JavaScript sebelumnya” Kode Jawaban

JS sebelum dibongkar

window.addEventListener('beforeunload', (event) => {
  // Cancel the event as stated by the standard.
  event.preventDefault();
  // Chrome requires returnValue to be set.
  event.returnValue = '';
});

Andrew Lautenbach

JavaScript sebelumnya

window.addEventListener("beforeunload", function(event) { ... });
window.onbeforeunload = function(event) { ... };

Yucky Yak

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