flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/builtins/prelude2.js

@@ -0,0 +1,45 @@
+parcelRequire = (function (init) {
+  // Save the require from previous bundle to this closure if any
+  var previousRequire = typeof parcelRequire === 'function' && parcelRequire;
+  var nodeRequire = typeof require === 'function' && require;
+  var modules = {};
+
+  function localRequire(name, jumped) {
+    if (name in modules) {
+      return modules[name];
+    }
+
+    // if we cannot find the module within our internal map or
+    // cache jump to the current global require ie. the last bundle
+    // that was added to the page.
+    var currentRequire = typeof parcelRequire === 'function' && parcelRequire;
+    if (!jumped && currentRequire) {
+      return currentRequire(name, true);
+    }
+
+    // If there are other bundles on this page the require from the
+    // previous one is saved to 'previousRequire'. Repeat this as
+    // many times as there are bundles until the module is found or
+    // we exhaust the require chain.
+    if (previousRequire) {
+      return previousRequire(name, true);
+    }
+
+    // Try the node require function if it exists.
+    if (nodeRequire && typeof name === 'string') {
+      return nodeRequire(name);
+    }
+
+    var err = new Error('Cannot find module \'' + name + '\'');
+    err.code = 'MODULE_NOT_FOUND';
+    throw err;
+  }
+
+  localRequire.register = function register(id, exports) {
+    modules[id] = exports;
+  };
+
+  modules = init(localRequire);
+  localRequire.modules = modules;
+  return localRequire;
+})