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superfile

v1.3.0

Published

What's better than a file input ? A superfile input

Downloads

12

Readme

superfile

NPM Downloads

Intro

An ES6 class to improve uploaders. Works great with Bootstrap but works with any input.

  • Resize image on client side to avoid large uploads
  • Preview image
  • Clear uploads
  • Crop to ratio
  • Drop support
  • Multiple/directory upload support

How to use

import Superfile from "./superfile.js";
Superfile.init();

Create a file input. It needs to be wrapped by a div with the superfile class.

You can add a clear button and a preview image if you want.

<div class="mb-3 superfile">
  <label for="formFile" class="form-label">Default file input example</label>
  <div class="input-group">
    <input class="form-control" type="file" id="formFile" name="file" />
    <button class="btn btn-outline-secondary superfile-clear" type="button">Clear</button>
  </div>
  <img class="img-fluid superfile-preview" />
</div>

Available options

These are set through data attributes:

  • disable-resize: don't try to resize the images and keep original files
  • max-width: the maximum width of the image (keep ratio)
  • max-height: the maximum height of the image (keep ratio)
  • hide-clear: hide clear element (if any) until preview is showed
  • ratio: set a ratio (eg: 1:1 for a square ratio) for the image. Image is cropped from the center. It can be used with max-width/max-height or independantly.
  • quality: image quality (defaults to 1 = 100%).
  • take pictures from the webcam

Limiting accepted file types

You can use the regular accept attribute.

<input type="file" accept=".gif,.jpg,.jpeg,.png,.doc,.docx" /> <input type="file" accept="image/*" />

Recommended css

  • Hide preview element when no src is set
  • Hide inputs until ready (avoids fouc)
  • Change input background color when dropping files
img:not([src]) {
  display: none;
}
.superfile:not(.superfile-ready) {
  visibility: hidden;
}
.superfile-drag input {
  background: palegoldenrod;
}

When set, the preview will get a src attribute like blob:http://someaddress/30fde1c6-911e-4b50-a823-e778d100ffb3 and be displayed

Demo

https://codepen.io/lekoalabe/pen/wvdVoNa

I need more

This is a simple improvement over regular file input.

If you need more, look at :

  • https://pqina.nl/filepond/
  • https://www.dropzonejs.com/