First item accordion open on page load

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Hi,

I have built a accordion, and I want to have the first item open on page load.
How can I do this with Jquery?

This is my code:

<script>
  $(document).ready(function(){
    $(".accordion_header").click(function() {
      $(".accordion_header").removeClass("active");
      $(this).addClass("active");
    })
  });
</script>

Html:

<div class="wrapper">
       <div class="accordion_wrap">
         <div class="accordion_header">
           <h5>INFO</h5>
         </div>
         <div class="accordion_body">
         <p>Lorem ipsum dolor sit amet,<br>
         consectetur adipiscing elit. <br></p>
         </div>
       </div>
       <div class="accordion_wrap">
         <div class="accordion_header">
           <h5>INFO</h5>
         </div>
         <div class="accordion_body">
         <p>Lorem ipsum dolor sit amet,<br>
         consectetur adipiscing elit. <br></p>
         </div>
       </div>
       <div class="accordion_wrap">
         <div class="accordion_header">
           <h5>INFO</h5>
         </div>
         <div class="accordion_body">
         <p>Lorem ipsum dolor sit amet,<br>
         consectetur adipiscing elit. <br></p>
         </div>
       </div>
     </div>

css is very long and I guess unnecessary.

Thanks,
Sam

What I have tried:

Tried to search the internet, and I have the code above.

Posted 18-Nov-20 6:57am

Sam Vorst

Updated 18-Nov-20 22:19pm

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Comments

[no name] 18-Nov-20 12:59pm

What gets loaded now if not "first"?

Sam Vorst 18-Nov-20 13:07pm

They are all closed now.

1 solution

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Richard Deeming · Accepted Answer · 2020-11-18T22:19:00

Either add the active class to the first item in the markup:

HTML

<div class="accordion_wrap">
    <div class="accordion_header active">
        <h5>INFO</h5>
    </div>

or add it via script:

JavaScript

$(function(){
    $(".accordion_header").click(function() {
        $(".accordion_header").removeClass("active");
        $(this).addClass("active");
    });
    
    $(".accordion_header:first").addClass("active");
});

NB: Pay attention to the documentation:

.ready() | jQuery API Documentation[^]:

jQuery offers several ways to attach a function that will run when the DOM is ready. All of the following syntaxes are equivalent:

$( handler )
$( document ).ready( handler )
$( "document" ).ready( handler )
$( "img" ).ready( handler )
$().ready( handler )

As of jQuery 3.0, only the first syntax is recommended; the other syntaxes still work but are deprecated.