Phap Dieu Duong introduced a File selector Vue js component called vue-file-selector that supports drag-n-drop and validation. You can simply click the upload button and drop the files. It offers many validation options, like Maximum file size, Minimum file size, etc.

Installation

You’ve to run this command for the installation via npm.

npm i vue-file-selector@latest

Usage

Please see the Demo project for a full example.

Declare the plugin

// import the library
import FileSelector from 'vue-file-selector';

// then use it!
Vue.use(FileSelector);
Use in Vue file
<template>
  <div>
    <file-selector
      accept-extensions=".jpg,.svg"
      :multiple="true"
      :max-file-size="5 * 1024 * 1024"
      @validated="handleFilesValidated"
      @changed="handleFilesChanged"
    >
      Select image files
    </file-selector>
  </div>
</template>

<script>
export default {
  name: 'App',
  methods: {
    handleFilesValidated(result, files) {
      console.log('Validation result: ' + result);
    },

    handleFilesChanged(files) {
      console.log('Selected files: ');
      console.table(files);
    },
  },
};
</script>

Slots

Name	Default	Description
default	Select	Content of the Select button.
loader	loading…	Content of loading state.
top	(empty)	Top section content, above the Select button.
bottom	(empty)	Bottom section content, below the Select button.

Props

Name	Type	Default	Description
multiple	Boolean	false	Allow multiple files selected.
isLoading	Boolean	false	Show or hide the loading section (slot: loader).
acceptExtensions	String	(empty)	List of file extensions accepted. Each extension separated by a comma (,). E.g. accept-extensions=".zip,.rar".
maxFileSize	Number	NaN	Maximum size in byte of every single file allowed. E.g. :max-file-size=“210241024” (only the files that ≤2 MB are allowed).
height	Number	NaN	The height of droppable section.
validateFn	Function -> Boolean	() => true	A custom validation function that returns a boolean value.

Events

1. @validated

Occurs after the selected files are validated.

Function(result: String | Boolean, files: FileList): void

• result: validation result,
• • returns true if the file validation is valid, else
• • returns false or Error codes (string).
• files: list of files validated.

2. @changed

Occurs if the selected files pass validation.

Function(files: FileList): void

• files: list of files validated.

Github source: https://github.com/d2phap/vue-file-selector