About

svelte-img-previewer is a tool for displaying images from input file types in svelte.

<input type="file" target="images/*" />

Getting Started

npm install svelte-img-previewer

Import and invoke the createImagePreviewer() builder.

The builder will create and return an object which contains a store and an action which you attach to an input file type.

• store: src : current image source state

• action: trigger : invokes a click event on the input imagePreviewer is being used

• action: imagePreviewer : updates the state of the src store on input event

You can optionally pass an initial state when calling the createImagePreviewer builder.

If you dont have an initial state to pass the createImagePreviewer the src store will have a null value. In this case you should conditionally render your image component / element.

Usage

<script>
    import { createImagePreviewer } from 'svelte-img-previewer';

    const avatar = 'https://avatars.githubusercontent.com/u/130720776?v=4'
    const { src, trigger, imagePreviewer } = createImagePreviewer(avatar);
</script>

<div>
    {#if $src}
        <img src={$src} alt="user avatar" />
    {/if}
</div>

<button use:trigger> Upload Image </button>
<input name="avatar" hidden type="file" accept="image/*" use:imagePreviewer />

<style>
    div {
        height: 100px;
        width: 100px;
        border: 2px solid black;
        margin-block-end: 10px;
    }

    img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
</style>