title: Declaring babel plugins for @babel/eslint-parser in .eslintrc
body: <p>I've been trying for a while now to get <code>@babel/plugin-proposal-class-properties</code> plugin to work nicely with <code>@babel/eslint-parser</code> and <code>eslint</code> without success.</p>
  <p>This is my <code>.eslintrc.js</code>:</p>
  <pre><code>...
    &quot;parser&quot;: &quot;@babel/eslint-parser&quot;,
    &quot;parserOptions&quot;: {
      &quot;ecmaVersion&quot;: 11,
      &quot;requireConfigFile&quot;: false,
    },
    &quot;plugins&quot;: [
      &quot;@babel&quot;,
    ],
  ...
  </code></pre>
  <p>And these are the related installed packages:</p>
  <pre><code>+-- @babel/core@7.11.1
  +-- @babel/eslint-parser@7.11.3
  +-- @babel/eslint-plugin@7.11.3
  +-- @babel/plugin-proposal-class-properties@7.10.4
  +-- eslint@7.7.0
  </code></pre>
  <hr>
  <p>Under this configuration, ESLint errors with this message:</p>
  <pre><code>Parsing error: \eg\example.js: Support for the experimental syntax 'classPrivateProperties' isn't currently enabled (xx:yy): (Fatal)
  </code></pre>
  <p>But if I add <code>@babel/plugin-proposal-class-properties</code> to <code>plugins</code> in <code>.eslintrc.js</code> like this:</p>
  <pre><code>  &quot;plugins&quot;: [
      &quot;@babel&quot;,
      &quot;@babel/plugin-proposal-class-properties&quot;,
    ],
  </code></pre>
  <p>I get this error:</p>
  <pre><code>Error while running ESLint: Failed to load plugin '@babel/plugin-proposal-class-properties' declared in '.eslintrc.js': Cannot find module '@babel/eslint-plugin-plugin-proposal-class-properties'.
  </code></pre>
  <hr>
  <p>It seems like this isn't the correct way to declare plugins for <code>@babel/eslint-parser</code> in <code>.eslintrc.js</code>. Still, I suspect it is possible due to this quote <a href="https://babeljs.io/blog/2020/07/13/the-state-of-babel-eslint#the-future" rel="noreferrer">here</a>:</p>
  <blockquote>
  <p><code>@babel/eslint-parser</code> also supports applying Babel configuration through your ESLint configuration.</p>
  </blockquote>
  <h2>So my question is:</h2>
  <p>Is it actually possible to declare babel plugins in <code>.eslintrc</code>? If so how exactly?</p>