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Unleash the Magic of the Public Folder

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Attention, brave adventurers! This feature requires react-scripts@0.5.0 or higher.

Unveiling the Mysteries of HTML​

Prepare to embark on a journey of HTML customization! Within the sacred public folder lies the fabled HTML file, ready to be molded to your will. Feel free to tweak it to your heart's content, whether it's altering the page title or adding enchanting meta tags. And fear not, for the build process shall automatically incorporate the compiled code into this mystical artifact.

Discover the Art of Asset Conjuring​

While we typically encourage importing assets through JavaScript for their magical benefits (minification, bundling, and caching), there exists an alternate path—an escape hatch—to add assets directly to the public folder.

Here's the secret: any file you place within the public folder will retain its original form, untampered by the sorcery of webpack. To summon these assets, you must invoke the powers of an ancient incantation: the PUBLIC_URL environment variable.

For instance, within index.html, witness the power of the PUBLIC_URL:

<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />

But beware! Only the files within the public folder can be accessed through this mystical prefix. Should you require a file from src or node_modules, you must duplicate it within the public folder, thus clearly stating your intention to include it in the grand build.

During the sacred ritual of npm run build, Create React App shall infuse %PUBLIC_URL% with the correct absolute path. This ensures your project remains robust, even amidst the treacherous realm of client-side routing or when hosted at a non-root URL.

To wield the power of PUBLIC_URL in your JavaScript spells, simply invoke the process.env.PUBLIC_URL incantation:

render() {
  // Note: this is an escape hatch and should be used sparingly!
  // Normally, we recommend importing assets using `import`, as described in the "Adding Images and Fonts" section above.
  return <img src={process.env.PUBLIC_URL + '/img/logo.png'} />;
}

Yet, be warned of the perils that await you on this path:

  • None of the files in the public folder shall undergo post-processing or minification.
  • Beware the wrath of missing files, for they shall manifest as dreaded 404 errors upon unsuspecting users.
  • The filenames of your results shall remain unchanged, devoid of the mighty content hashes. You must add query arguments or rename them manually whenever they change.

Embracing the Arcane Knowledge​

The public folder, though an unconventional ally, shines in rare scenarios where alternative methods falter:

  • When you seek to manifest a file with a specific name in the build output, such as the elusive manifest.webmanifest.
  • In the presence of a multitude of images, demanding dynamic path references that push the boundaries of mortal comprehension.
  • Should you yearn to include a humble script like pace.js outside the confines of bundled code.
  • And there are some libraries, resistant to the charms of webpack, that leave you no choice but to beckon them with a humble <script> tag.

However, dear adventurer, if you dare to add a <script> that unleashes global variables, turn your gaze towards the topic of Using Global Variables in the next section. There, you shall find wisdom on how to summon and bind these volatile forces.

With this newfound understanding, go forth and weave the magic of the public folder into your React creations, for you are now equipped to conquer the realms of customization and enchantment!

May your code be ever elegant and your journeys forever filled with whimsy.