Overview

A <sp-dropzone> is an area on the screen into which an object can be dragged and dropped to accomplish a task. For example, a drop zone might be used in an upload workflow to enable the user to drop a file from their operating system into the drop zone, which is a more efficient and intuitive action than utilizing the standard "Choose File" dialog.

Drop zones should be used with an illustrated message component as a child if the drop zone is empty, otherwise the existing content should be passed as a child.

Usage

yarn add @spectrum-web-components/dropzone

Import the side effectful registration of <sp-dropzone> via:

import '@spectrum-web-components/dropzone/sp-dropzone.js';

When looking to leverage the Dropzone base class as a type and/or for extension purposes, do so via:

import { Dropzone } from '@spectrum-web-components/dropzone';

Anatomy

The <sp-dropzone> element consists of several key parts:

• An illustrated message child component that includes a heading, illustration and an optional body area.
• An optional action area that can be used to provide additional context to the heading, including a single button or links to prompt the user to take action.

Examples

<sp-dropzone id="dropzone-1" style="width: 400px;">
    <sp-illustrated-message heading="Drag and drop your file">
        <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 150 103"
            width="150"
            height="103"
        >
            <path
                d="M133.7,8.5h-118c-1.9,0-3.5,1.6-3.5,3.5v27c0,0.8,0.7,1.5,1.5,1.5s1.5-0.7,1.5-1.5V23.5h119V92c0,0.3-0.2,0.5-0.5,0.5h-118c-0.3,0-0.5-0.2-0.5-0.5V69c0-0.8-0.7-1.5-1.5-1.5s-1.5,0.7-1.5,1.5v23c0,1.9,1.6,3.5,3.5,3.5h118c1.9,0,3.5-1.6,3.5-3.5V12C137.2,10.1,135.6,8.5,133.7,8.5z M15.2,21.5V12c0-0.3,0.2-0.5,0.5-0.5h118c0.3,0,0.5,0.2,0.5,0.5v9.5H15.2z M32.6,16.5c0,0.6-0.4,1-1,1h-10c-0.6,0-1-0.4-1-1s0.4-1,1-1h10C32.2,15.5,32.6,15.9,32.6,16.5z M13.6,56.1l-8.6,8.5C4.8,65,4.4,65.1,4,65.1c-0.4,0-0.8-0.1-1.1-0.4c-0.6-0.6-0.6-1.5,0-2.1l8.6-8.5l-8.6-8.5c-0.6-0.6-0.6-1.5,0-2.1c0.6-0.6,1.5-0.6,2.1,0l8.6,8.5l8.6-8.5c0.6-0.6,1.5-0.6,2.1,0c0.6,0.6,0.6,1.5,0,2.1L15.8,54l8.6,8.5c0.6,0.6,0.6,1.5,0,2.1c-0.3,0.3-0.7,0.4-1.1,0.4c-0.4,0-0.8-0.1-1.1-0.4L13.6,56.1z"
            ></path>
        </svg>
    </sp-illustrated-message>

    <div>
        <label for="file-input">
            <sp-link
                href="javascript:;"
                onclick="this.parentElement.nextElementSibling.click()"
            >
                Select a File
            </sp-link>
            from your computer
        </label>
        <input type="file" id="file-input" style="display: none" />
    </div>
    <div>
        or
        <sp-link href="http://stock.adobe.com" target="blank">
            Search Adobe Stock
        </sp-link>
    </div>
</sp-dropzone>

<sp-dropzone id="dropzone-1" style="width: 400px;">
    <sp-illustrated-message
        heading="Drag and drop your file"
        description="Or browse files on your computer"
    >
        <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 150 103"
            width="150"
            height="103"
        >
            <path
                d="M133.7,8.5h-118c-1.9,0-3.5,1.6-3.5,3.5v27c0,0.8,0.7,1.5,1.5,1.5s1.5-0.7,1.5-1.5V23.5h119V92c0,0.3-0.2,0.5-0.5,0.5h-118c-0.3,0-0.5-0.2-0.5-0.5V69c0-0.8-0.7-1.5-1.5-1.5s-1.5,0.7-1.5,1.5v23c0,1.9,1.6,3.5,3.5,3.5h118c1.9,0,3.5-1.6,3.5-3.5V12C137.2,10.1,135.6,8.5,133.7,8.5z M15.2,21.5V12c0-0.3,0.2-0.5,0.5-0.5h118c0.3,0,0.5,0.2,0.5,0.5v9.5H15.2z M32.6,16.5c0,0.6-0.4,1-1,1h-10c-0.6,0-1-0.4-1-1s0.4-1,1-1h10C32.2,15.5,32.6,15.9,32.6,16.5z M13.6,56.1l-8.6,8.5C4.8,65,4.4,65.1,4,65.1c-0.4,0-0.8-0.1-1.1-0.4c-0.6-0.6-0.6-1.5,0-2.1l8.6-8.5l-8.6-8.5c-0.6-0.6-0.6-1.5,0-2.1c0.6-0.6,1.5-0.6,2.1,0l8.6,8.5l8.6-8.5c0.6-0.6,1.5-0.6,2.1,0c0.6,0.6,0.6,1.5,0,2.1L15.8,54l8.6,8.5c0.6,0.6,0.6,1.5,0,2.1c-0.3,0.3-0.7,0.4-1.1,0.4c-0.4,0-0.8-0.1-1.1-0.4L13.6,56.1z"
            ></path>
        </svg>
    </sp-illustrated-message>

    <sp-button variant="accent">Browse files</sp-button>
</sp-dropzone>

States

When a file is dragged over the <sp-dropzone> element, it will display with the dragged attribute, as follows:

<sp-dropzone id="dropzone" dragged style="width: 400px;">
    <sp-illustrated-message heading="Drag and drop your file">
        <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 150 103"
            width="150"
            height="103"
        >
            <path
                d="M133.7,8.5h-118c-1.9,0-3.5,1.6-3.5,3.5v27c0,0.8,0.7,1.5,1.5,1.5s1.5-0.7,1.5-1.5V23.5h119V92c0,0.3-0.2,0.5-0.5,0.5h-118c-0.3,0-0.5-0.2-0.5-0.5V69c0-0.8-0.7-1.5-1.5-1.5s-1.5,0.7-1.5,1.5v23c0,1.9,1.6,3.5,3.5,3.5h118c1.9,0,3.5-1.6,3.5-3.5V12C137.2,10.1,135.6,8.5,133.7,8.5z M15.2,21.5V12c0-0.3,0.2-0.5,0.5-0.5h118c0.3,0,0.5,0.2,0.5,0.5v9.5H15.2z M32.6,16.5c0,0.6-0.4,1-1,1h-10c-0.6,0-1-0.4-1-1s0.4-1,1-1h10C32.2,15.5,32.6,15.9,32.6,16.5z M13.6,56.1l-8.6,8.5C4.8,65,4.4,65.1,4,65.1c-0.4,0-0.8-0.1-1.1-0.4c-0.6-0.6-0.6-1.5,0-2.1l8.6-8.5l-8.6-8.5c-0.6-0.6-0.6-1.5,0-2.1c0.6-0.6,1.5-0.6,2.1,0l8.6,8.5l8.6-8.5c0.6-0.6,1.5-0.6,2.1,0c0.6,0.6,0.6,1.5,0,2.1L15.8,54l8.6,8.5c0.6,0.6,0.6,1.5,0,2.1c-0.3,0.3-0.7,0.4-1.1,0.4c-0.4,0-0.8-0.1-1.1-0.4L13.6,56.1z"
            ></path>
        </svg>
    </sp-illustrated-message>

    <div>
        <label for="file-input">
            <sp-link
                href="javascript:;"
                onclick="this.parentElement.nextElementSibling.click()"
            >
                Select a File
            </sp-link>
            from your computer
        </label>
        <input type="file" id="file-input" style="display: none" />
    </div>
    <div>
        or
        <sp-link href="http://stock.adobe.com" target="blank">
            Search Adobe Stock
        </sp-link>
    </div>
</sp-dropzone>

When the <sp-dropzone> is in a filled state, set the filled attribute, as follows:

<sp-action-button draggable="true" style="margin-block-end: 16px;">
    Drag me
</sp-action-button>
<sp-dropzone tabindex="0" id="dropzone" drop-effect="copy">
    <sp-illustrated-message style="--mod-illustrated-message-display: flex;" heading="Drag and drop your file" id="message">
     <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 150 103"
            width="150"
            height="103"
        >
            <path
                d="M133.7,8.5h-118c-1.9,0-3.5,1.6-3.5,3.5v27c0,0.8,0.7,1.5,1.5,1.5s1.5-0.7,1.5-1.5V23.5h119V92c0,0.3-0.2,0.5-0.5,0.5h-118c-0.3,0-0.5-0.2-0.5-0.5V69c0-0.8-0.7-1.5-1.5-1.5s-1.5,0.7-1.5,1.5v23c0,1.9,1.6,3.5,3.5,3.5h118c1.9,0,3.5-1.6,3.5-3.5V12C137.2,10.1,135.6,8.5,133.7,8.5z M15.2,21.5V12c0-0.3,0.2-0.5,0.5-0.5h118c0.3,0,0.5,0.2,0.5,0.5v9.5H15.2z M32.6,16.5c0,0.6-0.4,1-1,1h-10c-0.6,0-1-0.4-1-1s0.4-1,1-1h10C32.2,15.5,32.6,15.9,32.6,16.5z M13.6,56.1l-8.6,8.5C4.8,65,4.4,65.1,4,65.1c-0.4,0-0.8-0.1-1.1-0.4c-0.6-0.6-0.6-1.5,0-2.1l8.6-8.5l-8.6-8.5c-0.6-0.6-0.6-1.5,0-2.1c0.6-0.6,1.5-0.6,2.1,0l8.6,8.5l8.6-8.5c0.6-0.6,1.5-0.6,2.1,0c0.6,0.6,0.6,1.5,0,2.1L15.8,54l8.6,8.5c0.6,0.6,0.6,1.5,0,2.1c-0.3,0.3-0.7,0.4-1.1,0.4c-0.4,0-0.8-0.1-1.1-0.4L13.6,56.1z"
            ></path>
        </svg>
    </sp-illustrated-message>
    <div>
        <label for="file-input">
            <sp-link
                href="javascript:;"
                onclick="this.parentElement.nextElementSibling.click()"
            >
                Select a File
            </sp-link>
            from your computer
        </label>
        <input type="file" id="file-input" style="display: none" />
    </div>
    <div>
        or
        <sp-link href="http://stock.adobe.com" target="blank">
            Search Adobe Stock
        </sp-link>
    </div>
</sp-dropzone>

<script type="module">
    customElements.whenDefined('sp-dropzone').then(() => {
        const dropzone = document.getElementById('dropzone');
        const message = document.getElementById('message');
        const fileInput = document.getElementById('file-input');
        let input;
        let beingDraggedOver = false;

        const updateMessage = () => {
            message.heading = input !== undefined
                ? (beingDraggedOver ? 'Drop here to replace!' : 'You dropped something!')
                : 'Drag and drop your file';
        };

        const handleDropOrChange = () => {
            input = 'mock-file';
            dropzone.setAttribute("filled", true);
            beingDraggedOver = false;
            updateMessage();
        };

        dropzone.addEventListener('dragover', (event) => {
            event.preventDefault();
            beingDraggedOver = true;
            updateMessage();
        });

        dropzone.addEventListener('dragleave', () => {
            beingDraggedOver = false;
            updateMessage();
        });

        dropzone.addEventListener('drop', (event) => {
            event.preventDefault();
            handleDropOrChange();
        });

        fileInput.addEventListener('change', handleDropOrChange);
    });
</script>

Accessibility

When actions, e.g. copy/paste, can be enacted directly on the <sp-dropzone> element itself, be sure to supply a tabindex so that keyboard users can find this interaction in the tab order. For screen readers, be sure to announce what the actions are, how to complete them, and when they are completed by supplying the appropriate role and aria-label attributes.

Include a label

A button is required to have either a visible text label or a label attribute on either the <sp-button> itself or on an <sp-icon*> element child.

Keyboard navigation

• Tab: Moves focus into the dropzone only when button or link is present.
• Enter or Space: Activates the button or link.