[node 加载逻辑] require(X) from module at path Y . If X is a core module, a. return the core module b. STOP . If X begins with './' or '/' or '../' a. LOAD_AS_FILE(Y + X) b. LOAD_AS_DIRECTORY(Y + X) . LOAD_NODE_MODULES(X, dirname(Y)) . THROW "not found&q…