TypeError: $(...).owlCarousel is not a function

StackOverflow https://stackoverflow.com/questions/21661292

  •  09-10-2022
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Question

I am having troubles adding this carousel to my prestashop template.

It returns me the following error:

TypeError: $(...).owlCarousel is not a function navigation : true

And the code using to initialize it is this one

$(document).ready(function() {
  $("#owl-demo").owlCarousel({
    navigation : true
  });
});

I am trying to solve it, but seems imposible, since on an empty html page it works but not when I use it on the Prestashop.

Any clue?

Thanks.

Was it helpful?

Solution

Add owl.carousel.min.js file in your home page and before the file in which you are using add the following code: 

$("#owl-demo").owlCarousel({
    navigation : true
  });

Then only it will work.

OTHER TIPS

You will get this error if the jquery file is loading after the owl carousel file.

(Make sure your reference to jquery is above the owl carousel reference js file)

If JavaScript files loading is affected by some latency, you can check if function is defined before call it.

Check with jQuery.isFunction

if($.isFunction('owlCarousel')){
  $("#owl-demo").owlCarousel({
    navigation : true
  });
}

Check with JavaScript typeof operator

if(typeof owlCarousel === 'function') { 
  $("#owl-demo").owlCarousel({
    navigation : true
  });
}

The reason sometime html executed inline script before external script loaded perfectly. I get solution by this way . I just added defer attribute to my owl.carouselsource calling like ..

<script defer src="plugins/OwlCarousel2.3/owl.carousel.min.js"></script>

Documentation about defer attribute --> att_script_defer-link

Try to use {literal} {/literal} tags. It's usually reccomanded to put javascript inside those tags in .tpl files (smarty) . Javascript might work without the tags but can sometimes return a error ( like in your case )

BR's

I got fixed by checking if the selector exist or not. As this was the issue on my website I had added code in footer for a single page but it was throwing error or other pages where that selector don't exist.

$(document).ready(function() {
    var owl = $('.servicesCarosal');
            
    //console.log(owl);

    if (owl.length) { 
        owl.owlCarousel({

        });
    } 
});

First, add Owl Carousel Css and Owl Carousel Theme Default Css files.

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/OwlCarousel2/2.3.4/assets/owl.carousel.css" integrity="sha512-UTNP5BXLIptsaj5WdKFrkFov94lDx+eBvbKyoe1YAfjeRPC+gT5kyZ10kOHCfNZqEui1sxmqvodNUx3KbuYI/A==" crossorigin="anonymous" referrerpolicy="no-referrer" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/OwlCarousel2/2.3.4/assets/owl.theme.default.css" integrity="sha512-OTcub78R3msOCtY3Tc6FzeDJ8N9qvQn1Ph49ou13xgA9VsH9+LRxoFU6EqLhW4+PKRfU+/HReXmSZXHEkpYoOA==" crossorigin="anonymous" referrerpolicy="no-referrer" />

Then add Jquery and Owl Carousel Js files.

Make sure to put Jquery before Owl Carousel Js.

Like this:

<!-- put jquery before owl carousel -->
<!-- jquery -->
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>

<!-- owl carousel -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/OwlCarousel2/2.3.4/owl.carousel.min.js" integrity="sha512-bPs7Ae6pVvhOSiIcyUClR7/q2OAsRiovw4vAkX+zJbw3ShAeeqezq50RIIcIURq7Oa20rW2n2q+fyXBNcU9lrw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

These might be helpful. Follow the steps

  1. Import/link the owlCarousel.js file
  2. Link owlCarousel.js file after jQuery.js file.
  3. Hard reload: ctrl + shift + R

Still facing problem?

It might be for this reason:

Your $(".owl-carousel").owlCarousel() function is executing before the loading of JS files (owlCarousel.js,jQuery.js)

Most of the case you can solve this issue by using this tricks & increasing timeout.

$(document).ready(function() {
    setTimeout(function(){
        $(".owl-carousel").owlCarousel()
    },
    2000);
});

I had the same problem. Just add the js file right above your function 

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/OwlCarousel2/2.3.4/owl.carousel.min.js"></script>
<!--DO NOT ENTER ANY EXTERNAL LINK IN BETWEEN-->
<script type="text/javascript">
$(document).ready(function() {
    $('.owl-carousel').owlCarousel({
        loop: true,
    });
});
</script>

In my case, where I am using Webpack to bundle my assets, I needed to follow this section on the owl's page on GitHub.

The section states that you should add JQuery like so:

webpack.config.js

const webpack = require('webpack');

//...
plugins: [
    new webpack.ProvidePlugin({
      $: 'jquery',
      jQuery: 'jquery',
      'window.jQuery': 'jquery'
    }),
],
//...

index.js

import 'owl.carousel/dist/assets/owl.carousel.css';
import 'owl.carousel';

Add jquery.min.js and owl.carousel.min.js files in your home page and add the following code:

$(document).ready(function() {
  var owl = $("#owl-demo");
  if(owl.length){
    $("#owl-demo").owlCarousel({
      navigation : true
    });
  }
});

Add Your Jquery file and owl.js file to header section

For me, adding itemclass to carousel-item

-result is below-

<div class="item carousel-item" style="margin: auto;">

solved problem.

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