node_modules ignore

server/node_modules/tiny-invariant/src/index.d.ts

@@ -0,0 +1 @@
+export default function invariant(condition: any, message?: string): void

server/node_modules/tiny-invariant/src/index.js

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+// @flow
+const isProduction: boolean = process.env.NODE_ENV === 'production';
+const prefix: string = 'Invariant failed';
+
+// Throw an error if the condition fails
+// Strip out error messages for production
+// > Not providing an inline default argument for message as the result is smaller
+export default function invariant(condition: mixed, message?: string) {
+  if (condition) {
+    return;
+  }
+  // Condition not passed
+
+  if (isProduction) {
+    // In production we strip the message but still throw
+    throw new Error(prefix);
+  } else {
+    // When not in production we allow the message to pass through
+    // *This block will be removed in production builds*
+    throw new Error(`${prefix}: ${message || ''}`);
+  }
+}