Executing JS after inner blocks have been rendered

To achieve this, you can use the useEffect hook from the wp.element package to run your JavaScript code after the inner blocks have been rendered.

Here’s an example of how you can do this in your custom block:

// Import necessary dependencies
const { registerBlockType } = wp.blocks;
const { InnerBlocks, useBlockProps } = wp.blockEditor;
const { useEffect } = wp.element;

// Create your custom block
registerBlockType('yournamespace/your-block', {
  title: 'Your Custom Block',
  category: 'design',
  edit: (props) => {
    const blockProps = useBlockProps();

    // Initialize Owl Carousel after inner blocks have been rendered
    useEffect(() => {
      const owlContainer = document.querySelector('.owl-carousel');

      if (owlContainer) {
        jQuery(owlContainer).owlCarousel({
          // Owl Carousel options go here
        });
      }
    }, []);

    return (
      <div {...blockProps}>
        <div className="owl-carousel">
          <InnerBlocks />
        </div>
      </div>
    );
  },
  save: (props) => {
    const blockProps = useBlockProps.save();
    return (
      <div {...blockProps}>
        <div className="owl-carousel">
          <InnerBlocks.Content />
        </div>
      </div>
    );
  },
});

In this example, I used the useEffect hook with an empty dependency array []. This means the effect will run only once after the component mounts. Inside the effect, I initialize the Owl Carousel using the container with the class .owl-carousel.

Make sure to replace yournamespace/your-block with your own block namespace and name, and customize the Owl Carousel options as needed.