How do I make a JavaScript function wait before executing (sleep / delay)?

You’ll need to enclose the code that you want to execute after the delay in a function (Func1()). This function will then be called with a delay, in our case from another function (Func1Delay()).

<script type="text/javascript">
function Func1()
alert("Delayed 3 seconds");
function Func1Delay()
setTimeout("Func1()", 3000);

Then you simply call Func1Delay() which in turn calls Func1() but with a delay of 3000 milliseconds (3 seconds):

<body onload="Func1Delay()">

Nathan Pakovskie is an esteemed senior developer and educator in the tech community, best known for his contributions to With a passion for coding and a knack for simplifying complex tech concepts, Nathan has authored several popular tutorials on C# programming, ranging from basic operations to advanced coding techniques. His articles, often characterized by clarity and precision, serve as invaluable resources for both novice and experienced programmers. Beyond his technical expertise, Nathan is an advocate for continuous learning and enjoys exploring emerging technologies in AI and software development. When he’s not coding or writing, Nathan engages in mentoring upcoming developers, emphasizing the importance of both technical skills and creative problem-solving in the ever-evolving world of technology. Specialties: C# Programming, Technical Writing, Software Development, AI Technologies, Educational Outreach

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