ros2-web-bridge: Error in npm install, please suggest the possible solution.

ref@1.3.5 install /home/username/ros2-web-bridge/node_modules/rclnodejs/node_modules/ref node-gyp rebuild

make: Entering directory ‘/home/username/ros2-web-bridge/node_modules/rclnodejs/node_modules/ref/build’ CXX(target) Release/obj.target/binding/src/binding.o …/src/binding.cc: In function ‘void init(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE)’: …/src/binding.cc:643:8: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] Nan::ForceSet(target, Nan::Newv8::String(“endianness”).ToLocalChecked(), Nan::Newv8::String(CheckEndianness()).ToLocalChecked(), static_ ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ …/src/binding.cc:643:8: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] Nan::ForceSet(target, Nan::Newv8::String(“endianness”).ToLocalChecked(), Nan::Newv8::String(CheckEndianness()).ToLocalChecked(), static_ ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ …/src/binding.cc:643:187: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] endianness").ToLocalChecked(), Nan::Newv8::String(CheckEndianness()).ToLocalChecked(), static_cast<PropertyAttribute>(ReadOnly|DontDelete)); ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ …/src/binding.cc:644:8: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] Nan::ForceSet(target, Nan::Newv8::String(“NULL”).ToLocalChecked(), WrapNullPointer(), static_cast<PropertyAttribute>(ReadOnly|DontDelete)) ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ …/src/binding.cc:644:8: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] Nan::ForceSet(target, Nan::Newv8::String(“NULL”).ToLocalChecked(), WrapNullPointer(), static_cast<PropertyAttribute>(ReadOnly|DontDelete)) ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ …/src/binding.cc:644:142: warning: ‘Nan::Maybe<bool> Nan::ForceSet(v8::Localv8::Object, v8::Localv8::Value, v8::Localv8::Value, v8::PropertyAttribute)’ is deprecated [-Wdeprecated-declarations] Nan::ForceSet(target, Nan::Newv8::String(“NULL”).ToLocalChecked(), WrapNullPointer(), static_cast<PropertyAttribute>(ReadOnly|DontDelete)); ^ In file included from …/node_modules/nan/nan.h:197:0, from …/src/binding.cc:7: …/node_modules/nan/nan_maybe_43_inl.h:116:35: note: declared here NAN_DEPRECATED inline Maybe<bool> ForceSet( ^ SOLINK_MODULE(target) Release/obj.target/binding.node COPY Release/binding.node make: Leaving directory ‘/home/username/ros2-web-bridge/node_modules/rclnodejs/node_modules/ref/build’

rclnodejs@0.3.1 install /home/username/ros2-web-bridge/node_modules/rclnodejs node-gyp rebuild

module.js:327 throw err; ^

Error: Cannot find module ‘nan’ at Function.Module._resolveFilename (module.js:325:15) at Function.Module._load (module.js:276:25) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at [eval]:1:1 at Object.exports.runInThisContext (vm.js:54:17) at Object.<anonymous> ([eval]-wrapper:6:22) at Module._compile (module.js:409:26) at node.js:579:27 at nextTickCallbackWith0Args (node.js:420:9) gyp: Call to ‘node -e “require(‘nan’)”’ returned exit status 1 while in binding.gyp. while trying to load binding.gyp gyp ERR! configure error gyp ERR! stack Error: gyp failed with exit code: 1 gyp ERR! stack at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:305:16) gyp ERR! stack at emitTwo (events.js:87:13) gyp ERR! stack at ChildProcess.emit (events.js:172:7) gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12) gyp ERR! System Linux 4.13.0-26-generic gyp ERR! command “/usr/local/bin/node” “/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js” “rebuild” gyp ERR! cwd /home/username/ros2-web-bridge/node_modules/rclnodejs gyp ERR! node -v v4.4.2 gyp ERR! node-gyp -v v3.3.1 gyp ERR! not ok npm ERR! Linux 4.13.0-26-generic npm ERR! argv “/usr/local/bin/node” “/usr/local/bin/npm” “install” npm ERR! node v4.4.2 npm ERR! npm v2.15.0 npm ERR! code ELIFECYCLE

npm ERR! rclnodejs@0.3.1 install: node-gyp rebuild npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the rclnodejs@0.3.1 install script ‘node-gyp rebuild’. npm ERR! This is most likely a problem with the rclnodejs package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node-gyp rebuild npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs rclnodejs npm ERR! Or if that isn’t available, you can get their info via: npm ERR! npm ERR! npm owner ls rclnodejs npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request: npm ERR! /home/username/ros2-web-bridge/npm-debug.log