当输入类型为数字时，Firefox 会自动触发 focusout/blur 事件

Question

I have a JavaScript code running perfectly in all browsers except Firefox. I am running it in Firefox Quantum Version 66.0.2 (64-bit). I have three HTML input controls, all have their display style set to none. Clicking on a link shows first input. On focusout event of first input, first input hides and second input becomes visible. Similarly on focusout of second input, second input hides and third becomes visible.

 function showFirst() { //Show first input $('#first').css('display', 'inline'); $('#first').focus(); } $(document).ready(function () { $('#first').focusout(function (event) { //Write log $('body').append('first focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie second $('#second').css('display', 'inline'); $('#second').focus(); }); $('#second').focusout(function (event) { //Write log $('body').append('second focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie third $('#third').css('display', 'inline'); $('#third').focus(); }); $('#third').focusout(function (event) { //Write log $('body').append('third focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie first $('#first').css('display', 'inline'); $('#first').focus(); }); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <!--It will show first input--> <a href="#" onclick="showFirst();">Click to show first</a> <!--Its focusout event will hide it and will show second input--> <input type="text" id="first" value="" style="display:none;background-color:yellow; color:black;" placeholder="First" /> <!--Its focusout event will hide it and will show third input--> <input type="number" id="second" value="" style="display:none;background-color:red; color:white;" placeholder="Second" /> <!--Its focusout event will hide it and will show first input--> <input type="number" id="third" value="" style="display:none;background-color:green; color:white;" placeholder="Third" /> <br /> <br /> <a href="#">&nbsp;</a> <!--Just to receive focus-->

The Problem:

When 'Click to show first' is clicked, it shows 'first' input. When tab is pressed then focusout events of 'second' and 'third' are fired by itself and 'second' and 'third' inputs are never shown. Interestingly if input type of all is changed from number to text then same code works fine.

Open this JSFiddle in Firefox to see it in action.

Answer 1

You need to set the listener for the next input after trigger the previous input focusout event.

Try the below code.

 function showFirst() { //Show first input $('#first').css('display', 'inline'); $('#first').focus(); } $(document).ready(function () { $('#first').focusout(function (event) { //Write log $('body').append('first focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie second $('#second').css('display', 'inline'); $('#second').focus(); $('#second').focusout(function (event) { //Write log $('body').append('second focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie third $('#third').css('display', 'inline'); $('#third').focus(); $('#third').focusout(function (event) { //Write log $('body').append('third focusout <br/>'); //hide itself event.currentTarget.style.display = 'none'; //show next input ie first $('#first').css('display', 'inline'); $('#first').focus(); }); }); }); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <!--It will show first input--> <a href="#" onclick="showFirst();">Click to show first</a> <!--Its focusout event will hide it and will show second input--> <input type="text" id="first" value="" style="display:none;background-color:yellow; color:black;" placeholder="First" /> <!--Its focusout event will hide it and will show third input--> <input type="number" id="second" value="" style="display:none;background-color:red; color:white;" placeholder="Second" /> <!--Its focusout event will hide it and will show first input--> <input type="number" id="third" value="" style="display:none;background-color:green; color:white;" placeholder="Third" /> <br /> <br /> <a href="#">&nbsp;</a> <!--Just to receive focus-->

Answer 2

Finally, I am able to solve it. It is a bug in Firefox version 60, 66, 67 and 68. See bug reports in bugzilla here and here . "Alice0775 White" suggested here to add timeout to focus. I just added timeout and it started working. Following is the working code:

    $(document).ready(function () {
        $('#first').focusout(function (event) {
            $('body').append('first focusout <br/>');
            event.currentTarget.style.display = 'none';
            $('#second').css('display', 'inline');

            //add timeout to focus
            setTimeout(function () {
                $('#second').focus();
            }, 0)
        });
        $('#second').focusout(function (event) {
            $('body').append('second focusout <br/>');
            event.currentTarget.style.display = 'none';
            $('#third').css('display', 'inline');

            //add timeout to focus
            setTimeout(function () {
                $('#third').focus();
            }, 0)
        });
        $('#third').focusout(function (event) {
            $('body').append('third focusout <br/>');
            event.currentTarget.style.display = 'none';
            $('#first').css('display', 'inline');

            //add timeout to focus
            setTimeout(function () {
                $('#first').focus();
            }, 0)
        });
    });