So I’m having this issue: I have a form which contain a lot of element. Whenever I change an element (for example, a textbox or a text area), then I go to another page, the browser will display a confirm message for me to confirm if I’m sure to exit.
Here is my simple form, not the real one:
<form action="/action_page.php"> <label for="fname">First name:</label><br> <input type="text" id="fname" name="fname"><br> <label for="lname">Last name:</label><br> <input type="text" id="lname" name="lname"><br><br> <input type="submit" value="Submit"> </form>
So, when I edit the FirstName or the LastName and go out, the confirm message will appear. But when I delete all the changes and go out, the confirm message won’t appear anymore. And because of I also use my form when I insert and edit, I cannot just simply compare between the input fname and "" (For example) but I need to compare the original data and the new one.
Thank you very much.