Is there a way to ensure a Javascript alert appears just one time and never again?

Question

Is there a way to ensure a Javascript alert appears just one time and never again?

I struggle with Javascript, but I have a specific task that needs to be completed. I am participating in a school competition and need an alert to appear only once throughout the entire project, not just once per browsing session. The alert will inform users that Internet Explorer is not compatible with my site, recommending Chrome or Firefox instead. However, I want to avoid bombarding the judges with multiple pop-ups, so having it show up only once is crucial. I found the code below online, but I can't seem to get it working properly due to my limited Javascript skills - I'm better with HTML and CSS. If there are alternative solutions to achieve this goal, please let me know! Thank you!

<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>

<!--[if IE]>    
    <script type="text/javascript">
        $(document).one(function() { alert("You are using Internet Explorer to view this webpage. Your experience may be subpar while using Internet Explorer; we recommend using an alternative internet browser, such as Chrome or Firefox, to view our website."); });
    </script>
<![endif]-->

javascript jquery html css alert

Answer 1

Answer №1

one isn't the solution as a page refresh will erase all the 'memory'.

If you're seeking a more lasting option, consider using localStorage. Otherwise, for users on internet explorer versions prior to 8, utilizing cookies might be necessary:


<script type="text/javascript>
var alerted = localStorage.getItem('alerted') || '';
if (alerted != 'yes') {
 alert("If you are viewing this webpage in Internet Explorer, we recommend switching to Chrome or Firefox for a better browsing experience.");
 localStorage.setItem('alerted','yes');
}
</script>

UPDATE:

For IE versions below 8, cookies must be used instead of localStorage. The concept remains the same, just with different techniques. Refer to this question for guidance on implementing cookies.

Once you've implemented the code from the example, you'll have access to two functions - createCookie() and getCookie().


var createCookie = function(name, value, days) {
....
//copy it from the other question
..
}

function getCookie(c_name) {
....
//copy it from the other question
..
}

<!--[if IE]>  
    <script type="text/javascript">
                var alerted = getCookie('alerted') || '';
                if (alerted != 'yes') {
                 alert("If you are viewing this webpage in Internet Explorer, we recommend switching to Chrome or Firefox for a better browsing experience.");
                 createCookie('alerted','yes',365);//cookie expires after 365 days
                }
            </script>
<![endif]-->

I hope this information proves helpful!

Answer 2

one isn't the solution as a page refresh will erase all the 'memory'.

If you're seeking a more lasting option, consider using localStorage. Otherwise, for users on internet explorer versions prior to 8, utilizing cookies might be necessary:


<script type="text/javascript>
var alerted = localStorage.getItem('alerted') || '';
if (alerted != 'yes') {
 alert("If you are viewing this webpage in Internet Explorer, we recommend switching to Chrome or Firefox for a better browsing experience.");
 localStorage.setItem('alerted','yes');
}
</script>

UPDATE:

For IE versions below 8, cookies must be used instead of localStorage. The concept remains the same, just with different techniques. Refer to this question for guidance on implementing cookies.

Once you've implemented the code from the example, you'll have access to two functions - createCookie() and getCookie().


var createCookie = function(name, value, days) {
....
//copy it from the other question
..
}

function getCookie(c_name) {
....
//copy it from the other question
..
}

<!--[if IE]>  
    <script type="text/javascript">
                var alerted = getCookie('alerted') || '';
                if (alerted != 'yes') {
                 alert("If you are viewing this webpage in Internet Explorer, we recommend switching to Chrome or Firefox for a better browsing experience.");
                 createCookie('alerted','yes',365);//cookie expires after 365 days
                }
            </script>
<![endif]-->

I hope this information proves helpful!

Is there a way to ensure a Javascript alert appears just one time and never again?

Answer №1

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