ExternalsType: "import" | "var" | "module" | "assign" | "this" | "window" | "self" | "global" | "commonjs" | "commonjs2" | "commonjs-module" | "commonjs-static" | "amd" | "amd-require" | "umd" | "umd2" | "jsonp" | "system" | "promise" | "script" | "node-commonjs"