Nuxt•3mo ago

nuxt ui carousel + nuxtimg preload images

Hi, I'm using nuxt ui carousel (embla carousel) to display nuxtimg images. however I filter my list of items i put into the carousel based on the variant selected of my product. so when i change product the items list will contain some new items and it seems that those new images are then downloaded. is it possible for me to somehow preload all images for my variants even if not in the items array yet?

35 Replies

kapa.ai•3mo ago

Hi @WiFi Plug. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Based on the available knowledge sources, you can use the Nuxt Image component's preload prop to preload images. This will add a corresponding <link rel="preload"> tag in the page's head for each image you specify, which helps the browser start downloading those images early—even if they're not yet rendered in the carousel. For example:

<NuxtImg src="/image-for-variant-1.jpg" preload />
<NuxtImg src="/image-for-variant-2.jpg" preload />

<NuxtImg src="/image-for-variant-1.jpg" preload />
<NuxtImg src="/image-for-variant-2.jpg" preload />

This approach works for images you know in advance, regardless of whether they're currently in the carousel's items array. You can programmatically render these <NuxtImg preload /> tags (even hidden) for all images you want to preload for your variants, ensuring they're downloaded ahead of time and available when the user switches variants or updates the carousel items array Nuxt Image preload prop. There is no mention in the knowledge sources of a built-in Nuxt or Nuxt UI Carousel API to batch preload images that are not yet in the carousel's items array, so the recommended approach is to use the preload prop on <NuxtImg> for each image you want to preload. If you want to further optimize, you could also use the placeholder prop to display a low-quality placeholder while the image loads, but this does not preload the full image in advance Nuxt Image placeholder prop. In summary:
- Use <NuxtImg preload /> for each image you want to preload, even if not in the carousel yet. - There is no carousel-specific batch preload API for images not in the items array. Let me know if you need an example of how to generate these tags dynamically! ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai how can i programatically render the nuxtimg preload tags? and where should i put that on an onmounted maybe?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- You can programmatically render <NuxtImg preload /> tags by looping through your list of image sources and rendering a <NuxtImg> for each, with the preload prop set. This can be done in your component's template, and you do not need to wait for onMounted—preloading works best when the tags are present in the initial render so the browser can start downloading as soon as possible. For example, if you have an array of image URLs for all variants:

<template>
  <!-- Preload all images for all variants -->
  <div style="display: none;">
    <NuxtImg
      v-for="img in allVariantImages"
      :key="img"
      :src="img"
      preload
    />
  </div>
</template>

<script setup>
const allVariantImages = [
  '/image-for-variant-1.jpg',
  '/image-for-variant-2.jpg',
  // ...other images
]
</script>

<template>
  <!-- Preload all images for all variants -->
  <div style="display: none;">
    <NuxtImg
      v-for="img in allVariantImages"
      :key="img"
      :src="img"
      preload
    />
  </div>
</template>

<script setup>
const allVariantImages = [
  '/image-for-variant-1.jpg',
  '/image-for-variant-2.jpg',
  // ...other images
]
</script>

- The <div style="display: none;"> ensures these images are not visible, but the <NuxtImg preload /> tags will still inject the appropriate <link rel="preload"> tags into the page head. - You do not need to use onMounted for this; it should be part of your component's initial render so preloading is effective. This approach is supported by the Nuxt Image documentation, which states that using the preload prop will place a corresponding link tag in the page's head, allowing the browser to preload the image resource Nuxt Image preload prop. If you dynamically generate the list of images, just ensure the array is available at render time. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

2kap @kapa.ai in my carousel on the images I use format=webp and i specify the width=450 but in the preloading part I don't. could it be that therefore it's preloading different images than it needs and that's why?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Yes, that is likely the cause. When you use the preload prop on <NuxtImg>, it preloads the image with the exact parameters you specify (such as format, width, etc.). If your preloading <NuxtImg> does not include the same format and width as the images in your carousel, the URLs generated for preloading will be different from those used in the carousel. As a result, the browser will download both versions: one for preloading and another when the carousel image is actually rendered. To ensure the correct images are preloaded and avoid duplicate downloads, you should specify the same format and width (and any other relevant props) in your preloading <NuxtImg> as you do in your carousel images. For example:

<!-- Preload -->
<NuxtImg src="/image.jpg" format="webp" width="450" preload />

<!-- Carousel -->
<NuxtImg src="/image.jpg" format="webp" width="450" />

<!-- Preload -->
<NuxtImg src="/image.jpg" format="webp" width="450" preload />

<!-- Carousel -->
<NuxtImg src="/image.jpg" format="webp" width="450" />

This ensures the preloaded image matches the one used in the carousel, so the browser can use the preloaded resource directly Nuxt Image format prop, Nuxt Image preload prop, Nuxt Image width/height. If you omit these props in the preloading tag, Nuxt Image will generate a different URL (e.g., different size or format), leading to unnecessary downloads. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai "200 OK (from disk cache)" it seems in my network tab that it's still grabbing images but from the disk cache at least? so is that fine

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Yes, seeing "200 OK (from disk cache)" in your network tab is generally a good sign. It means the browser is serving the image from its local cache rather than downloading it again from the server. This results in faster load times and reduced network usage for your users. The Nuxt Image module's preload prop is designed to help the browser fetch and cache images early, so when the image is actually needed (e.g., when the carousel displays it), the browser can serve it from cache, as you're observing Nuxt Image preload prop. So, this behavior is expected and indicates that your preloading strategy is working as intended. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai how does responsivity on Ubreadcrubs work? it seems on mobile if i have long breadcrtumbs then they remain taking up only one line but truncate the text in each breadcrumb. are there other options for mobile? maybe where it flex wraps to the next line as needed?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The responsivity of the UBreadcrumb component in Nuxt UI is handled by default using CSS classes that ensure the breadcrumb remains on a single line and truncates the text of each breadcrumb item if it overflows. This is achieved with classes like truncate on the breadcrumb label and flex/min-w-0 on the container and items, which prevent wrapping and instead apply ellipsis to overflowing text UBreadcrumb Theme. From the theme configuration:

linkLabel: 'truncate',
item: 'flex min-w-0',
list: 'flex items-center gap-1.5',

linkLabel: 'truncate',
item: 'flex min-w-0',
list: 'flex items-center gap-1.5',

This setup ensures that, even on mobile, the breadcrumb stays on one line and the text is truncated rather than wrapped. Alternative wrapping behavior:
The knowledge sources do not mention a built-in option or prop to allow the breadcrumb to flex-wrap onto multiple lines on mobile or small screens. If you want to change this behavior, you would need to override the default CSS classes—specifically, remove or adjust the flex and truncate classes and allow wrapping with flex-wrap or similar CSS. However, this is not documented as a supported feature in the official Nuxt UI documentation. Summary:
- By default, UBreadcrumb keeps breadcrumbs on a single line and truncates text. - There is no documented built-in option to allow wrapping to multiple lines on mobile. - Customization would require manual CSS overrides, which is not covered in the official docs UBreadcrumb Theme. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai in my carousel I want to make my own arrows how can I hook into the carousel properly to click a button to scroll to index correctly?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To create your own custom arrows and control the Nuxt UI Carousel, you should use the exposed emblaApi instance. You can access it by using useTemplateRef with a ref on your <UCarousel>. The emblaApi provides methods like scrollTo(index) to programmatically navigate to a specific slide. Here’s a minimal example:

<script setup lang="ts">
const carousel = useTemplateRef('carousel')
const goToSlide = (index: number) => {
  carousel.value?.emblaApi?.scrollTo(index)
}
</script>

<template>
  <UCarousel ref="carousel" :items="items" />
  <button @click="goToSlide(0)">Go to first slide</button>
  <button @click="goToSlide(1)">Go to second slide</button>
  <!-- Add more buttons as needed -->
</template>

<script setup lang="ts">
const carousel = useTemplateRef('carousel')
const goToSlide = (index: number) => {
  carousel.value?.emblaApi?.scrollTo(index)
}
</script>

<template>
  <UCarousel ref="carousel" :items="items" />
  <button @click="goToSlide(0)">Go to first slide</button>
  <button @click="goToSlide(1)">Go to second slide</button>
  <!-- Add more buttons as needed -->
</template>

This approach gives you full control to implement your own arrow buttons or any other navigation UI. Just call goToSlide(index) with the desired slide index when your custom arrow is clicked Carousel Expose With Thumbnails Example. If you want to implement "previous" and "next" buttons, you can use the scrollPrev() and scrollNext() methods from the Embla API in a similar way. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai in my embla carousel I display reviews, the number of lines in each review can vary, but I want it to work such that the items with fewer lines of text will be aligned to the bottom currently they're aligned to the top by default how should i do it

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I'm sorry, but the knowledge sources do not explicitly mention how to vertically align carousel items to the bottom in the Nuxt UI Carousel (Embla) component. The default alignment for carousel items is to the top, as you observed, and there is no documented prop or slot customization for changing vertical alignment within carousel items. To achieve bottom alignment, you would typically need to adjust the CSS of the item slot, possibly by applying flex utilities such as flex-col and justify-end to the container of each carousel item. However, this approach is not covered in the official documentation, so I cannot provide a Nuxt UI-specific solution with confidence. If you need further guidance, you may want to experiment with custom CSS on the item slot or consult the Nuxt UI Carousel documentation for any updates. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai best way to ensure nuxtimg stays the same size even before the images are loaded as currently there's a jump when they appear

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To ensure that <NuxtImg> stays the same size even before the images are loaded (preventing layout shift or "jump"), you should always specify the width and height props. This reserves the correct space for the image in the layout before it loads, so the page doesn't shift when the image appears. For example:

<NuxtImg src="/my-image.jpg" width="400" height="300" />

<NuxtImg src="/my-image.jpg" width="400" height="300" />

Additionally, you can use the placeholder prop to display a low-quality placeholder or a custom image while the main image loads, further improving the perceived stability of your layout:

<NuxtImg src="/my-image.jpg" width="400" height="300" placeholder />

<NuxtImg src="/my-image.jpg" width="400" height="300" placeholder />

This approach is recommended in the Nuxt Image documentation to avoid layout jumps and provide a smoother user experience Nuxt Image width/height Nuxt Image placeholder. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai but in my case I use object-cover as my actual sizing and my height=320 is only really to specify the image size rather than the actual size

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The knowledge sources confirm that specifying the width and height props on <NuxtImg> reserves space and prevents layout shift, but they do not provide explicit guidance for cases where you use CSS like object-cover and the height prop is only for image optimization, not for actual rendered size. In this scenario, you should: - Continue specifying width and height on <NuxtImg> to ensure the correct aspect ratio and to help Nuxt Image generate optimized images and placeholders. - Control the actual rendered size of the image using CSS (e.g., set the container's height and width, and use object-cover on the image). For example:

<template>
  <div style="width: 100%; height: 320px; position: relative;">
    <NuxtImg
      src="/my-image.jpg"
      width="800"
      height="600"
      style="width: 100%; height: 100%; object-fit: cover;"
      placeholder
    />
  </div>
</template>

<template>
  <div style="width: 100%; height: 320px; position: relative;">
    <NuxtImg
      src="/my-image.jpg"
      width="800"
      height="600"
      style="width: 100%; height: 100%; object-fit: cover;"
      placeholder
    />
  </div>
</template>

- Here, width="800" and height="600" are for image optimization and placeholder generation. - The container (div) and the inline styles on <NuxtImg> ensure the image always fills the space and uses object-cover, regardless of the intrinsic image size. This approach is consistent with the Nuxt Image documentation, which recommends using width and height for optimization and layout stability, while allowing you to control the actual display size with CSS as needed Nuxt Image width/height. If you need the image to always fill a specific area with object-cover, set the container's size via CSS and let the image stretch to fit, as shown above. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai are there any optimisations for <video> if I have videos using the video tag in a carousel? I use preload=meta but is there anything else i can do to optimise/defer loading the video?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I'm sorry, but the knowledge sources do not contain specific information about optimizations for the <video> tag in a carousel context within Nuxt or Nuxt UI. There is no mention of best practices for deferring or optimizing video loading beyond the use of the preload attribute. If you need advanced video optimization strategies, you may need to consult general web performance resources or the official HTML video documentation, as this is not covered in the provided Nuxt documentation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai nuxtlink I want a link but styled as my primary color but so that it still has a nice hover animation is there a premade style or variant for that or just css hover effect i need to add

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The knowledge sources do not mention a specific premade style or variant for <NuxtLink> that automatically applies your primary color with a built-in hover animation. The documented button and navigation components in Nuxt UI have variants for primary color and hover effects, but <NuxtLink> itself does not have a dedicated style in the official sources. To achieve a primary-colored link with a nice hover animation, you would typically need to add custom CSS classes to your <NuxtLink>. For example, you can use utility classes (like Tailwind CSS) or your own CSS to style the link and its hover state. If you want a style similar to the "primary" button or navigation link, you can refer to the classes used in those components, such as text-primary for the color and hover:text-primary/75 for the hover effect Button Theme. Example:

<NuxtLink
  to="/your-path"
  class="text-primary hover:text-primary/75 transition-colors"
>
  My Primary Link
</NuxtLink>

<NuxtLink
  to="/your-path"
  class="text-primary hover:text-primary/75 transition-colors"
>
  My Primary Link
</NuxtLink>

This will give you a link styled with your primary color and a smooth color transition on hover, similar to the Nuxt UI button/link variants. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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WiFi PlugOP•3mo ago

@kapa.ai i exported an svg image from figma, what's the easiest way to use it as an svg so i can change its color on hover? svgo?

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The knowledge sources do not provide a detailed, step-by-step guide for using an SVG exported from Figma and changing its color on hover in Nuxt. However, they do mention that you can use SVGs directly in your Nuxt project, and modules like nuxt-svgo can help with importing SVGs as components, making it easier to style them with CSS using the nuxt-svgo module, SVGs are not being loaded or "found". With nuxt-svgo, you can place your SVG in the assets directory, and it will be auto-imported as a component. You can then use CSS to change its color on hover, for example:

<template>
  <SvgoMyIcon class="icon" />
</template>

<style>
.icon {
  fill: #333;
  transition: fill 0.2s;
}
.icon:hover {
  fill: #0070f3; /* Change to your desired hover color */
}
</style>

<template>
  <SvgoMyIcon class="icon" />
</template>

<style>
.icon {
  fill: #333;
  transition: fill 0.2s;
}
.icon:hover {
  fill: #0070f3; /* Change to your desired hover color */
}
</style>

Note:
- Make sure your SVG uses fill="currentColor" for its shapes, so the CSS fill property works as expected. - The knowledge sources do not provide more details about SVGO configuration or advanced usage, but this is the general approach supported by the referenced module. If you need more advanced SVG handling or color manipulation, you may need to consult the nuxt-svgo documentation, as this is not fully covered in the provided sources. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

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nuxt ui carousel + nuxtimg preload images

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