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- var oldData;
- var newData;
- function saveOldData() {
- oldData = document.getElementById("someForm").value;
- }
- window.onload = saveOldData;
- function toCloseOrNotToClose() {
- newData = document.getElementById("someForm").value;
- if (newData != oldData) {
- return "Є незбережені дані. Точно закрити сторінку?";
- }
- }
- window.onbeforeunload = toCloseOrNotToClose;
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