title: Can't extend spacing on Tailwind
body: <p>I'm trying to extend the spacing on Tailwind, but I can't make it work. I did my research and I made the changes in the <code>tailwind.config.js</code>, but when I use the class in the HTML, it doesn't exist.</p>
  <p>PS: I understand that there is no need to run the build</p>
  <p><em>tailwind.config.js</em></p>
  <pre class="lang-js prettyprint-override"><code>module.exports = {
    purge: [],
    darkMode: false, // or 'media' or 'class'
    theme: {
      extend: {
        spacing: {
          '1/3': '33,333333%',
          '2/3': '66,666667%'
        }
      },
    },
    variants: {
      extend: {},
    },
    plugins: [],
  }
  </code></pre>