Information Security with HelmetJS - Configure Helmet Using the ‘parent’ helmet() Middleware

As a reminder, this project is being built upon the following starter project on Glitch, or cloned from GitHub.

app.use(helmet()) will automatically include all the middleware introduced above, except noCache(), and contentSecurityPolicy(), but these can be enabled if necessary. You can also disable or configure any other middleware individually, using a configuration object.

// Example


frameguard: { // configure

action: 'deny'


contentSecurityPolicy: { // enable and configure

directives: {

defaultSrc: ["self"],

styleSrc: [''],



dnsPrefetchControl: false // disable


We introduced each middleware separately for teaching purpose, and for ease of testing. Using the ‘parent’ helmet() middleware is easiest, and cleaner, for a real project.