jQuery ready()

Introduction

Use ready() to make a function available after the document is loaded:

Toggle between slide up and slide down for a p element.

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<!DOCTYPE html>
<html>
<head>
<script 
 src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
</script>/*from   w w  w.j av  a2 s  .  co  m*/
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("p").slideToggle();
  });
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<button>test</button>

</body>
</html>

The ready event occurs when the document object model (DOM) has been loaded.

Two syntaxes can be used: 

$(document).ready(function)

The ready() method can only be used on the current document, no selector is required: 

$(function)
Parameter OptionalDescription
function Required. function to run after the document is loaded



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