.js

class ServerlessPlugin {
  constructor(serverless, options) {
    // ...
    this.hooks = {
      'before:welcome:hello': this.beforeWelcome.bind(this),
      'welcome:hello': this.welcomeUser.bind(this),
      'welcome:world': this.displayHelloMessage.bind(this),
      'after:welcome:world': this.afterHelloWorld.bind(this),
    };
  }
}