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
 • 37,510 points • 22,045 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
 • 82,880 points

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