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[英]How do I save user input content in the view and do a post call to the controller when navigate away from page, silently
[英]do not allow user to navigate away from page if text box contains text
我正在使用这个JS代码:
window.onbeforeunload = function() {
return "Any changes you have made WILL be lost!";
}
如果用户尝试离开页面,则显示警报窗口
如果文本区域中有文本,我只希望显示警报
我努力了:
window.onbeforeunload = function() {
var update_text = document.getElementById('ticket_update').value;
if(!update_text == '') {
return "Any changes you have made WILL be lost!";
}
}
但如果文本区域为空,则根本不显示警报
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