Initial commit: Crypto trader application

frontend/node_modules/@mui/utils/legacy/getReactElementRef/getReactElementRef.js

@@ -0,0 +1,19 @@
+import * as React from 'react';
+
+/**
+ * Returns the ref of a React element handling differences between React 19 and older versions.
+ * It will throw runtime error if the element is not a valid React element.
+ *
+ * @param element React.ReactElement
+ * @returns React.Ref<any> | null
+ */
+export default function getReactElementRef(element) {
+  // 'ref' is passed as prop in React 19, whereas 'ref' is directly attached to children in older versions
+  if (parseInt(React.version, 10) >= 19) {
+    var _element$props;
+    return (element == null || (_element$props = element.props) == null ? void 0 : _element$props.ref) || null;
+  }
+  // @ts-expect-error element.ref is not included in the ReactElement type
+  // https://github.com/DefinitelyTyped/DefinitelyTyped/discussions/70189
+  return (element == null ? void 0 : element.ref) || null;
+}