1 files changed, 56 insertions, 0 deletions
diff --git a/node_modules/postcss-normalize-charset/src/index.js b/node_modules/postcss-normalize-charset/src/index.js
new file mode 100644
index 00000000..eb8cde80
--- /dev/null
+++ b/node_modules/postcss-normalize-charset/src/index.js
@@ -0,0 +1,56 @@
+'use strict';
+const charset = 'charset';
+// eslint-disable-next-line no-control-regex
+const nonAscii = /[^\x00-\x7F]/;
+
+/**
+ * @typedef {{add?: boolean}} Options
+ */
+/**
+ * @type {import('postcss').PluginCreator<Options>}
+ * @param {Options} opts
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator(opts = {}) {
+  return {
+    postcssPlugin: 'postcss-normalize-' + charset,
+
+    OnceExit(css, { AtRule }) {
+      /** @type {import('postcss').AtRule | undefined} */
+      let charsetRule;
+      /** @type {import('postcss').Node | undefined} */
+      let nonAsciiNode;
+
+      css.walk((node) => {
+        if (node.type === 'atrule' && node.name === charset) {
+          if (!charsetRule) {
+            charsetRule = node;
+          }
+          node.remove();
+        } else if (
+          !nonAsciiNode &&
+          node.parent === css &&
+          nonAscii.test(node.toString())
+        ) {
+          nonAsciiNode = node;
+        }
+      });
+
+      if (nonAsciiNode) {
+        if (!charsetRule && opts.add !== false) {
+          charsetRule = new AtRule({
+            name: charset,
+            params: '"utf-8"',
+          });
+        }
+        if (charsetRule) {
+          charsetRule.source = nonAsciiNode.source;
+          css.prepend(charsetRule);
+        }
+      }
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+module.exports = pluginCreator;