How to run angularjs projects

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AngularJs

when i run gulp serve then i have find an errors

Error: Cannot find module 'utf8'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (......../gulp-patterns/node_modules/browser-sync/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:5:12)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)