Encountered Runtime Error: TypeError - Carousel triggering issue with reading properties of null (specifically 'classList') in Tailwind Elements

Question

Encountered Runtime Error: TypeError - Carousel triggering issue with reading properties of null (specifically 'classList') in Tailwind Elements

Currently, I am encountering the error message:

Unhandled Runtime Error TypeError: Cannot read properties of null (reading 'classList')

while utilizing the Carousel component. The problem arises when I attempt to populate the carousel with images from an array using the following method:

<div className="carousel-inner relative w-full overflow-hidden max-h-[300px]">
  {project.imageslist.map((image, i) => (
    <div
      key={i}
      className={`carousel-item ${i < 1 ? "active" : ""} float-left w-full`}>
      <img
        src={image.listitemimg}
        className="block w-full"
        alt="Wild Landscape"
      />
    </div>
  ))}
</div>

Do you have any suggestions on how to address this issue?

I have attempted adding each individual carousel-item manually instead of relying on the map function, but unfortunately, the problem persists.

javascript next.js tailwind-css

Answer 1

Answer №1

The solution to the query was that it is necessary to include an equal number of button elements as the total slides you have in your carousel. For instance, if you have 4 slides (carousel-item) then you should also have 4 buttons within the carousel-indicator. In case there are less buttons than slides, you can add an additional button with the appropriate details (data-bs-slide and aria-label incremented by 1).

Here's a corrected example:

<div
  className="carousel-indicators absolute right-0 bottom-0 left-0 flex justify-center p-0 mb-4">
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="0"
    className="active"
    aria-current="true"
    aria-label="Slide 1"></button>
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="1"
    aria-label="Slide 2"></button>
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="2"
    aria-label="Slide 3"></button>
  <!-- Additional fix below -->
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="3"
    aria-label="Slide 4"></button>
</div>

Answer 2

The solution to the query was that it is necessary to include an equal number of button elements as the total slides you have in your carousel. For instance, if you have 4 slides (carousel-item) then you should also have 4 buttons within the carousel-indicator. In case there are less buttons than slides, you can add an additional button with the appropriate details (data-bs-slide and aria-label incremented by 1).

Here's a corrected example:

<div
  className="carousel-indicators absolute right-0 bottom-0 left-0 flex justify-center p-0 mb-4">
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="0"
    className="active"
    aria-current="true"
    aria-label="Slide 1"></button>
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="1"
    aria-label="Slide 2"></button>
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="2"
    aria-label="Slide 3"></button>
  <!-- Additional fix below -->
  <button
    type="button"
    data-bs-target="#carouselExampleCrossfade"
    data-bs-slide-to="3"
    aria-label="Slide 4"></button>
</div>

Answer 3

Answer №2

There may be an issue arising from the project.imageslist array potentially being null or undefined.

Prior to mapping through the array, make sure to verify that project.imageslist.length > 0:

{project.imageslist.length > 0 && project.imageslist.map((image, i) => (
    <div
      key={i}
      className={`carousel-item ${i < 1 ? "active" : ""} float-left w-full`}>
      <img
        src={image.listitemimg}
        className="block w-full"
        alt="Wild Landscape"
      />
    </div>
  ))}

Answer 4

There may be an issue arising from the project.imageslist array potentially being null or undefined.

Prior to mapping through the array, make sure to verify that project.imageslist.length > 0:

{project.imageslist.length > 0 && project.imageslist.map((image, i) => (
    <div
      key={i}
      className={`carousel-item ${i < 1 ? "active" : ""} float-left w-full`}>
      <img
        src={image.listitemimg}
        className="block w-full"
        alt="Wild Landscape"
      />
    </div>
  ))}

Encountered Runtime Error: TypeError - Carousel triggering issue with reading properties of null (specifically 'classList') in Tailwind Elements

Answer №1

Answer №2

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