How to Consistently Prevent Form Submission in JavaScript Across Browsers, Including IE?

event.preventDefault() Function Inconsistencies in IE

Your MooTools JavaScript code encounters an issue when attempting to prevent form submission in Internet Explorer. This is because IE does not support the event.preventDefault() method, which is present in other browsers like Firefox.

To resolve this inconsistency in your code, consider utilizing the event.returnValue = false; alternative for IE. This line effectively prevents the form from being submitted without the need for the preventDefault() method.

Alternatively, you can conduct a conditional check to determine the browser compatibility before applying the appropriate method:

if (event.preventDefault) {
  event.preventDefault();
} else {
  event.returnValue = false;
}

This combined approach ensures seamless form submission prevention across various browsers, including IE. By accounting for browser differences, your code will function consistently and reliably.

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