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• Mediator pattern
  • Resources

"is a design pattern that allows us to expose a unified interface through which the different parts of a system may communicate" - Essential JS design patterns, Addy Osmani

It's also normally defined as a behavioral pattern.

Source

Source

Example:

const orgChart = {
  addEmployee: function(){
    const details = this.getDetails();
    details.on('ev1', function(){
      const manager = this.getManager(employee);
      manager.on('ev2', function(){
        employee.save();
      });
    });
  }
}

Pros

• Reduces the interaction between different parties from many to one
• Helps in the process of decoupling objects which often promotes smaller, reusable components.

Cons

• Introduces a single point of failure

• Essential JS design patterns, Addy Osmani
• Event Aggregator And/Or/vs Mediator: A Tale Of Two Patterns
• Mediator.js