Call of undefined while first time load after next build

I am still getting call of undefined error. I think its because i require npm package in componentWillMount. I also tried in componentDidMount. I got the error for the first time i load the after build. How to solve this.

[malikimprowised]

For example if i add package like this way only for client side

 componentDidMount() {
    d3 = require("d3");
  }

Now if i do client side navigation to the component that acquire this code. At that time during first navigation i get the error.

[malikimprowised]

It works for me. I use npm and my script in package.json is

"scripts": {
    "dev": "node server.js",
    "build": "next build",
    "start": "NODE_ENV=production node server.js"
  },

and when i do npm run build it gets build.