Preventing default behavior or Click Event tag in JavaScript inside Ajax Call

I used e.preventDefault()in the past to cancel the click event, but it's hard for me to understand why it does not work in this scenario. I assigned all the tags in the column with the class name, and then I get links to them with document.queryselectorAll(.classname), and then for each tag add a click event that receives values ​​from the server, and if the check fails, it should be prevented by default and give a message to the user.

(function(){
const userName = document.getElementById('FullName').value;

// route
$route = '';
if (CheckDeploy(window.location.origin)) {
    $route = '/x/GetReviewerCheck/';
} else {
    $route = '/servername/s/GetReviewerCheck/';
}

let ReviewButtons = document.querySelectorAll('.verifyReviewer'); // .verifyReviewer = className of all a tags in table column

for (var i = 0; i < ReviewButtons.length; i++) {
    const ReviewButton = ReviewButtons[i];
    ReviewButton.addEventListener('click', function (e) {
        let newRow = ReviewButton.parentElement.parentElement;
        let AuditorName = newRow.cells[2].innerText;
        let ReviewType = newRow.cells[8].innerText;

        let ReviewTypeID = 0;
        if (ReviewType == 'Peer Review') {
            ReviewTypeID = 3;
        } else if (ReviewType == 'Team Leader Review') {
            ReviewTypeID = 4;
        }
        else if (ReviewType == 'Supervisor Review') {
            ReviewTypeID = 5;
        }

        let id = newRow.cells[0].firstChild.getAttribute('id').split('_')[1];

        $.ajax({
            url: $route,
            type: 'POST',
            data: { userName: userName, auditor: AuditorName, reviewType: ReviewTypeID, recordID: id },
            success: function (data) {
                // if data is 1, prevent default
                if(data == 1){
                    e.preventDefault();
                    return false;
                }
            }
        });

    }, false);
}
})();
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1 answer

, . e.preventDefault() , ajax- . .

  • .
  • .
  • 1, preventDefault().

for . , .

for (var i = 0; i < ReviewButtons.length; i++) {
        const ReviewButton = ReviewButtons[i];
        ReviewButton.addEventListener('click', function (e) {
            let newRow = ReviewButton.parentElement.parentElement;
            let AuditorName = newRow.cells[2].innerText;
            let ReviewType = newRow.cells[8].innerText;

            let ReviewTypeID = 0;
            if (ReviewType == 'Peer Review') {
                ReviewTypeID = 3;
            } else if (ReviewType == 'Team Leader Review') {
                ReviewTypeID = 4;
            }
            else if (ReviewType == 'Supervisor Review') {
                ReviewTypeID = 5;
            }

            let id = newRow.cells[0].firstChild.getAttribute('id').split('_')[1];

            $.ajax({
                url: $route,
                type: 'POST',
                data: { userName: userName, auditor: AuditorName, reviewType: ReviewTypeID, recordID: id },
                beforeSend:function()
                {
                    e.preventDefault(); //Prevent default action for all instances.
                },
                success: function (data) {
                    // if data is 1, prevent default
                    if(data != 1){
                        $(this).unbind('click'); // Restores the click default behaviour if data != 1
                        return false;
                    }

                }
            });

        }, false);
    }
+2

Source: https://habr.com/ru/post/1659867/


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