1 files changed, 50 insertions, 0 deletions
diff --git a/node_modules/stylehacks/src/plugins/htmlFirstChild.js b/node_modules/stylehacks/src/plugins/htmlFirstChild.js
new file mode 100644
index 00000000..f772786b
--- /dev/null
+++ b/node_modules/stylehacks/src/plugins/htmlFirstChild.js
@@ -0,0 +1,50 @@
+'use strict';
+const parser = require('postcss-selector-parser');
+const exists = require('../exists');
+const isMixin = require('../isMixin');
+const BasePlugin = require('../plugin');
+const { OP_9 } = require('../dictionary/browsers');
+const { SELECTOR } = require('../dictionary/identifiers');
+const { RULE } = require('../dictionary/postcss');
+const { HTML } = require('../dictionary/tags');
+
+module.exports = class HtmlFirstChild extends BasePlugin {
+  /** @param {import('postcss').Result} result */
+  constructor(result) {
+    super([OP_9], [RULE], result);
+  }
+
+  /**
+   * @param {import('postcss').Rule} rule
+   * @return {void}
+   */
+  detect(rule) {
+    if (isMixin(rule)) {
+      return;
+    }
+
+    parser(this.analyse(rule)).processSync(rule.selector);
+  }
+
+  /**
+   * @param {import('postcss').Rule} rule
+   * @return {parser.SyncProcessor<void>}
+   */
+  analyse(rule) {
+    return (selectors) => {
+      selectors.each((selector) => {
+        if (
+          exists(selector, 0, HTML) &&
+          exists(selector, 1, ':first-child') &&
+          exists(selector, 2, ' ') &&
+          selector.at(3)
+        ) {
+          this.push(rule, {
+            identifier: SELECTOR,
+            hack: selector.toString(),
+          });
+        }
+      });
+    };
+  }
+};