Method chaining pattern

Method chaining is a programming pattern that allows you to call multiple methods on the same object in a single statement. Each method returns the object itself (this), enabling you to call the next method on the same line.

Create a simple counter object:

const counter = {
  count: 0,
  
  increment() {
    this.count++;
    return this;
  },
  
  decrement() {
    this.count--;
    return this;
  },
  
  getValue() {
    return this.count;
  }
};

Now you can chain methods together:

// Chain multiple operations
counter.increment().increment().decrement();

// The count is now 1
console.log(counter.getValue()); // Output: 1

The key to method chaining is returning this from each method that you want to be chainable.