76d77f0887
It doesn't fire if you go back to the edit page and the browser auto-fills the previous contents, but oh well.
15 lines
412 B
JavaScript
15 lines
412 B
JavaScript
(function () {
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let changed = false;
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let textarea = document.querySelector('.edit-form__textarea');
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let warnBeforeClosing = function (ev) {
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ev.preventDefault();
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return ev.returnValue = 'Are you sure you want to exit? You have unsaved changes.';
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};
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textarea.addEventListener('input', function () {
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if (!changed) window.addEventListener('beforeunload', warnBeforeClosing);
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changed = true;
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});
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})();
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