### SvelteKit Integration Example for Image Uploader

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Demonstrates how to integrate the ImageUploader component into a SvelteKit page. It imports the component and places it within the main content area of the page, styled with Tailwind CSS. This example showcases the basic usage of the component.

```svelte
<!-- src/routes/+page.svelte -->
<script lang="ts">
  import ImageUploader from "$lib/components/image-uploader.svelte";
</script>

<main class="min-h-screen bg-gradient-to-br from-[#FFB8B8] via-[#FFD0B0] to-[#FFEDBF] pt-20 pb-4">
  <div class="container space-y-8">
    <h1 class="text-center text-5xl font-semibold">
      Svelte Image Uploader
    </h1>
    <p class="mx-auto max-w-[700px] text-center text-xl">
      Image uploader component with validation built in
    </p>
    <ImageUploader />
  </div>
</main>
```

--------------------------------

### Initialize Image Uploader Component

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Main Svelte component that handles image upload workflow including drag-and-drop, file validation, preview generation, and form submission. Requires SvelteKit environment with shadcn-svelte, superforms, zod, and svelte-file-dropzone dependencies.

```svelte
<script lang="ts">
  import ImageUploader from "$lib/components/image-uploader.svelte";
</script>

<main class="min-h-screen p-8">
  <ImageUploader />
</main>
```

--------------------------------

### Svelte Image Uploader Package Dependencies

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Lists the core dependencies required for the Svelte Image Uploader, including svelte-file-dropzone for drag-and-drop functionality, lucide-svelte for icons, and @vercel/analytics for usage tracking. It also includes development dependencies like @sveltejs/kit and Tailwind CSS.

```json
{
  "dependencies": {
    "svelte-file-dropzone": "^2.0.9",
    "lucide-svelte": "^0.511.0",
    "@vercel/analytics": "^1.5.0"
  },
  "devDependencies": {
    "@sveltejs/kit": "^2.16.0",
    "svelte": "^5.0.0",
    "tailwindcss": "^4.0.0",
    "bits-ui": "^2.4.1",
    "formsnap": "^2.0.1",
    "sveltekit-superforms": "^2.25.0",
    "svelte-sonner": "^1.0.4",
    "zod": "^3.25.46"
  }
}
```

--------------------------------

### shadcn-svelte Configuration for SvelteKit

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Defines the configuration for shadcn-svelte components, specifying Tailwind CSS paths, color themes, component aliases, and TypeScript usage. This enables CLI-based component management and ensures a standardized component structure within the SvelteKit project.

```json
{
  "$schema": "https://next.shadcn-svelte.com/schema.json",
  "tailwind": {
    "css": "src/app.css",
    "baseColor": "slate"
  },
  "aliases": {
    "components": "$lib/components",
    "utils": "$lib/utils",
    "ui": "$lib/components/ui",
    "hooks": "$lib/hooks",
    "lib": "$lib"
  },
  "typescript": true,
  "registry": "https://next.shadcn-svelte.com/registry"
}
```

--------------------------------

### Spinner Component Usage in Svelte

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Demonstrates usage of a simple SVG-based loading spinner component for indicating processing states, customizable with Tailwind CSS classes. It integrates into forms or buttons to show loading during operations like file uploads; the component itself is typically defined separately with TypeScript support. Dependencies include lucide-svelte or similar for icons if customized; limitations include reliance on CSS animations and static SVG structure for basic use cases.

```svelte
<script lang="ts">
  import Spinner from "$lib/components/spinner.svelte";
</script>

<!-- Basic usage -->
<Spinner />

<!-- With custom styling -->
<Spinner class="size-8 text-blue-500 animate-spin" />

<!-- In a button -->
<button disabled>
  <Spinner class="mx-auto animate-spin" />
  Processing...
</button>
```

--------------------------------

### Complete Image Upload Form in Svelte

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Implements a full image upload form with drag-and-drop functionality, file validation using Zod schema, and integration with shadcn-svelte Form components and sveltekit-superforms for state management. The form accepts JPEG and PNG files under 5MB, displays previews and error messages, and handles submissions with loading states. It depends on libraries like svelte-file-dropzone, svelte-sonner for toasts, and lucide-svelte for icons; limitations include SPA mode for updates and fixed file type/size constraints.

```svelte
<script lang="ts">
  import * as Form from "$lib/components/ui/form";
  import Dropzone from "svelte-file-dropzone";
  import { fileProxy, superForm } from "sveltekit-superforms";
  import { zodClient } from "sveltekit-superforms/adapters";
  import { toast } from "svelte-sonner";
  import { cn } from "$lib/utils";
  import { z } from "zod";
  import { ImagePlus } from "lucide-svelte";
  import Spinner from "$lib/components/spinner.svelte";

  let disabled = $state(false);
  let preview = $state<string | ArrayBuffer | null>("");
  let inputRef = $state<HTMLInputElement | null>(null);
  let isDragActive = $state(false);

  const formSchema = z.object({
    image: z
      .instanceof(File, { message: "Please upload an image" })
      .refine((f) => f.size < 5_000_000, "The image should be less than 5MB")
      .refine(
        (f) => f.type === "image/jpeg" || f.type === "image/png",
        "Only jpg, jpeg or png files are accepted",
      ),
  });

  const form = superForm(
    { image: new File([""], "filename") },
    {
      validators: zodClient(formSchema),
      SPA: true,
      onUpdate: ({ form }) => {
        if (form.valid) {
          preview = null;
          toast.success(`Image uploaded successfully 🎉 ${form.data.image.name}`);
        }
      },
    },
  );

  let file = $state(fileProxy(form, "image"));
  const { form: formData, enhance } = form;
</script>

<form method="POST" enctype="multipart/form-data" use:enhance class="space-y-4">
  <Form.Field {form} name="image" class="mx-auto md:w-1/2">
    <Form.Control>
      {#snippet children({ props })}
        <Form.Label class="text-xl font-semibold">
          Upload your image
        </Form.Label>
        <Dropzone
          inputElement={inputRef}
          accept={["image/jpeg", "image/png"]}
          maxSize={5_000_000}
          on:dragenter={() => (isDragActive = true)}
          on:dragleave={() => (isDragActive = false)}
          class="border-foreground mx-auto flex cursor-pointer flex-col items-center justify-center gap-y-2 rounded-lg border p-8 shadow-sm"
        >
          {#if preview}
            <img src={preview as string} alt="" class="max-h-[400px] rounded-lg" />
          {:else}
            <ImagePlus class="size-40" />
          {/if}
          <input
            {...props}
            bind:this={inputRef}
            bind:files={$file}
            type="file"
            class="hidden"
          />
          {#if isDragActive}
            <p>Drop the image!</p>
          {:else}
            <p>Click here or drag an image to upload it</p>
          {/if}
        </Dropzone>
      {/snippet}
    </Form.Control>
    <Form.FieldErrors />
  </Form.Field>
  <Form.Button {disabled} class="mx-auto block h-auto rounded-lg px-8 py-3 text-xl">
    {#if disabled}
      <Spinner class="mx-auto animate-spin" />
    {:else}
      Submit
    {/if}
  </Form.Button>
</form>
```

--------------------------------

### Handle File Input Selection

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Processes files selected through native file input element, creates preview URLs using FileReader, and updates form state. Provides click-to-upload alternative to drag-and-drop. Works with hidden input elements.

```typescript
function oninput(e: Event & { currentTarget: EventTarget & HTMLInputElement }) {
  const reader = new FileReader();
  const acceptedFile = e.currentTarget.files?.[0];

  if (!acceptedFile) {
    preview = null;
    $formData.image = new File([""], "filename");
    return;
  }

  files.rejected = [];

  try {
    reader.onload = () => (preview = reader.result);
    reader.readAsDataURL(acceptedFile);
    $formData.image = acceptedFile;
  } catch {
    preview = null;
    $formData.image = new File([""], "filename");
  }
}

// Usage with hidden input
let inputRef = $state<HTMLInputElement | null>(null);

<input
  bind:this={inputRef}
  bind:files={$file}
  {oninput}
  type="file"
  class="hidden"
/>
```

--------------------------------

### Handle File Drop Events

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Processes files from drag-and-drop events, separates accepted/rejected files, and generates image previews using FileReader API. Updates form data with accepted files and handles errors gracefully. Requires svelte-file-dropzone component.

```typescript
let preview = $state<string | ArrayBuffer | null>("");
let files: { accepted: File[]; rejected: File[] } = $state({
  accepted: [],
  rejected: [],
});

function onDrop(e: { detail: { acceptedFiles: File[]; fileRejections: File[] } }) {
  const { acceptedFiles, fileRejections } = e.detail;
  files.accepted = acceptedFiles;
  files.rejected = fileRejections;

  const reader = new FileReader();
  try {
    reader.onload = () => (preview = reader.result);
    reader.readAsDataURL(acceptedFiles[0]);
    $formData.image = acceptedFiles[0];
  } catch {
    preview = null;
    $formData.image = new File([""], "filename");
  }
}

// Usage with Dropzone component
<Dropzone
  accept={["image/jpeg", "image/png"]}
  maxSize={5_000_000}
  on:drop={(e) => {
    onDrop(e);
    isDragActive = false;
  }}
/>
```

--------------------------------

### cn Utility Function in TypeScript

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Provides a class name merging utility that combines clsx for conditional classes and tailwind-merge for resolving Tailwind CSS conflicts, ensuring efficient styling in components. It takes multiple ClassValue inputs and outputs a merged string, useful for dynamic Tailwind classes without conflicts. Dependencies include clsx and tailwind-merge libraries; limitations are tied to Tailwind's utility class system and do not handle non-Tailwind styles.

```typescript
import { clsx, type ClassValue } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

// Usage examples
const buttonClass = cn(
  "px-4 py-2 rounded",
  isActive && "bg-blue-500",
  isDisabled && "opacity-50 cursor-not-allowed"
);
// Output: "px-4 py-2 rounded bg-blue-500" (when isActive=true, isDisabled=false)

const dropzoneClass = cn(
  "border-2 border-dashed p-8",
  isDragActive && "border-blue-500 bg-blue-50",
  hasError && "border-red-500"
);
```

--------------------------------

### Define Zod Form Schema Validation

Source: https://context7.com/cheveniko/svelte-image-uploader/llms.txt

Zod schema for validating image uploads with constraints on file size (max 5MB) and file types (JPEG/PNG only). Integrates with superforms for client-side validation. Returns validation errors for invalid files.

```typescript
import { z } from "zod";

const formSchema = z.object({
  image: z
    .instanceof(File, { message: "Please upload an image" })
    .refine((f) => f.size < 5_000_000, "The image should be less than 5MB")
    .refine(
      (f) => f.type === "image/jpeg" || f.type === "image/png",
      "Only jpg, jpeg or png files are accepted",
    ),
});

// Use with superforms
import { superForm, fileProxy } from "sveltekit-superforms";
import { zodClient } from "sveltekit-superforms/adapters";

const form = superForm(
  { image: new File([""], "filename") },
  {
    validators: zodClient(formSchema),
    SPA: true,
    onUpdate: ({ form }) => {
      if (form.valid) {
        console.log("Image uploaded:", form.data.image.name);
        console.log("File size:", form.data.image.size);
        console.log("File type:", form.data.image.type);
      }
    },
  },
);
```

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