feat: initial commit of Railtrack Pro prototype with complete test suite

node_modules/cssstyle/lib/utils/strings.js

@@ -0,0 +1,28 @@
+// Forked from https://github.com/jsdom/jsdom/blob/main/lib/jsdom/living/helpers/strings.js
+
+"use strict";
+
+/**
+ * Converts a string to ASCII lowercase.
+ *
+ * @see https://infra.spec.whatwg.org/#ascii-lowercase
+ * @param {string} s - The string to convert.
+ * @returns {string} The converted string.
+ */
+function asciiLowercase(s) {
+  if (!/[^\x00-\x7f]/.test(s)) {
+    return s.toLowerCase();
+  }
+  const len = s.length;
+  const out = new Array(len);
+  for (let i = 0; i < len; i++) {
+    const code = s.charCodeAt(i);
+    // If the character is between 'A' (65) and 'Z' (90), convert using bitwise OR with 32
+    out[i] = code >= 65 && code <= 90 ? String.fromCharCode(code | 32) : s[i];
+  }
+  return out.join("");
+}
+
+module.exports = {
+  asciiLowercase
+};