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@daviddarnes/storage-form

v2.0.1

Published

A Web Component that allows you to submit data to local storage

Downloads

70

Readme

storage-form

A Web Component that allows you to submit data to local storage.

Demo | Further reading

Examples

General usage example:

<script type="module" src="storage-form.js"></script>

<storage-form>
  <form>
    <label>
      Example
      <input type="text" name="example" value="value" />
    </label>
    <button>Submit</button>
  </form>
</storage-form>

Example of submitting with change event instead of a submit button. Use case for light/dark mode:

<script type="module" src="storage-form.js"></script>

<storage-form>
  <form>
    <label>
      <input type="radio" name="theme" value="dark" />
      <span>Dark mode</span>
    </label>
    <label>
      <input type="radio" name="theme" value="light" />
      <span>Light mode</span>
    </label>
    <label>
      <input type="radio" name="theme" value="" checked />
      <span>Default mode</span>
    </label>
    <br />
    <label>
      <input type="hidden" name="contrast" value />
      <input type="checkbox" name="contrast" value="true" />
      <span>High contrast</span>
    </label>
  </form>
</storage-form>

Example of hooking into storage event:

<script type="module" src="storage-form.js"></script>

<storage-form>
  <form>
    <label>
      Update the
      <code>output</code>
      by checking the box
      <input type="hidden" name="output" value />
      <input type="checkbox" name="output" value="updated" />
    </label>
  </form>
</storage-form>

<output></output>
<script>
  const updatePage = () => {
    document.querySelector("output").innerHTML = JSON.stringify(
      window.localStorage
    );
  };
  window.addEventListener("storage", updatePage);
  updatePage();
</script>

Features

This Web Component allows you to:

  • Use regular form elements to manipulate data in local storage
  • Invoke a storage event on the page to hook into elsewhere on the page
  • Maintain the forms state, using local storage, when the page is refreshed or reloaded
  • Optionally submit the form on the forms change event by omitting the forms submit button/input element

Installation

You have a few options (choose one of these):

  1. Install via npm: npm install @daviddarnes/storage-form
  2. Download the source manually from GitHub into your project.
  3. Skip this step and use the script directly via a 3rd party CDN (not recommended for production use)

Usage

Make sure you include the <script> in your project (choose one of these):

<!-- Host yourself -->
<script type="module" src="storage-form.js"></script>
<!-- 3rd party CDN, not recommended for production use -->
<script
  type="module"
  src="https://www.unpkg.com/@daviddarnes/[email protected]/storage-form.js"
></script>
<!-- 3rd party CDN, not recommended for production use -->
<script
  type="module"
  src="https://esm.sh/@daviddarnes/[email protected]"
></script>

Credit

With thanks to the following people: