How to run JavaScript code before page load

0 votes

 have working in asp.net web application. Here I need to run JavaScript before page load.

I have tried:

<body oninit="funinit();" onprerender="funRender();" onload="funload();">


</body>

 <script type="text/javascript" language="javascript">
    function funinit() {
        alert("funinit");
    }
    function funload() {
        alert("funload");
    }
    function funRender() {
        alert("funRender");
    }      

</script>

here only funload() is working.

Sep 9, 2020 in Java-Script by kartik
 • 37,520 points • 23,429 views

1 answer to this question.

0 votes

Hello @kartik,

You can use window.onpaint for such purpose like :

<script type="text/javascript">
    function preloadFunc()
    {
        alert("PreLoad");
    }
    window.onpaint = preloadFunc();
</script>

Hope it helps!!

If you need to know more about Java, join our Java certification course online.

ThanK you!

answered Sep 9, 2020 by Niroj
 • 82,840 points

Related Questions In Java-Script

0 votes
1 answer

How do I call a JavaScript function on page load?

Hello @kartik, If you want the onload method ...READ MORE

answered Sep 4, 2020 in Java-Script by Niroj
 • 82,840 points • 22,930 views
0 votes
1 answer

How to Determine if page is valid in JavaScript - ASP.NET?

Hello @kartik,  Make the call on an input ...READ MORE

answered Sep 9, 2020 in Java-Script by Niroj
 • 82,840 points • 2,781 views
0 votes
1 answer

How to check Page.Validate() on client side (JavaScript) in ASP.Net?

Hello @kartik, Page_ClientValidate() will work. It returns true if ...READ MORE

answered Sep 9, 2020 in Java-Script by Niroj
 • 82,840 points • 3,667 views
0 votes
1 answer

How to detect when a user leaves a web page using javascript?

Hello @kartik, Try the onbeforeunload event: It is fired just ...READ MORE

answered Oct 9, 2020 in Java-Script by Niroj
 • 82,840 points • 5,360 views
0 votes
1 answer

Why it is necessary to refresh CSRF token per form request?

Hello, Generating a new CSRF token for each ...READ MORE

answered Mar 19, 2020 in Laravel by Niroj
 • 82,840 points • 4,559 views
0 votes
1 answer

What is meant by passing the variable by value and reference in PHP?

Hello, When the variable is passed as value ...READ MORE

answered Mar 27, 2020 in PHP by Niroj
 • 82,840 points • 3,262 views
0 votes
1 answer

Connection with MySQL server using PHP. How can we do that?

Hey @kartik, You have to provide MySQL hostname, ...READ MORE

answered Mar 27, 2020 in PHP by Niroj
 • 82,840 points • 1,296 views
0 votes
1 answer

How to retrieve or obtain data from the MySQL database using PHP?

Hello kartik,  Actually there are many functions that  ...READ MORE

answered Mar 27, 2020 in PHP by Niroj
 • 82,840 points • 3,358 views
0 votes
1 answer

How to Scroll to the top of the page using JavaScript?

Hii @kartik, Using javascript <script> $("a[href='#top']").click(function() { ...READ MORE

answered Apr 2, 2020 in Java-Script by Niroj
 • 82,840 points • 1,102 views
0 votes
1 answer

How to find event listeners on a DOM node when debugging or from the JavaScript code?

Hii @kartik, It is possible to list all ...READ MORE

answered Jun 8, 2020 in Java-Script by Niroj
 • 82,840 points • 128,487 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.