this Keyword in Different Contexts

What pattern does this code demonstrate?

const calculator = {
  value: 0,
  add(n) {
    this.value += n;
    return this;
  },
  subtract(n) {
    this.value -= n;
    return this;
  }
};

calculator.add(5).subtract(2);

Factory Pattern
Module Pattern
Method Chaining
This demonstrates method chaining with 'this': 1) Each method returns 'this' for chaining, 2) Maintains context throughout the chain, 3) Enables fluent interface design, 4) 'this' refers to calculator object consistently, 5) Common in builder patterns and jQuery-style APIs, 6) Improves code readability and reduces variable assignments.
Constructor Pattern

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