bind(), call(), and apply()

What makes method chaining possible in this code?

const calculator = {
  value: 0,
  add(a) {
    this.value += a;
    return this;
  },
  multiply(b) {
    this.value *= b;
    return this;
  }
};

const calculate = calculator.add.bind(calculator, 5);
console.log(calculate().multiply(2).value);

The bind() method
Returning this from methods
Method chaining works because: 1) Each method returns this reference, 2) bind() preserves the calculator context, 3) Returned this allows continued method access, 4) Chain maintains proper context throughout operations, 5) Enables fluent interface pattern, 6) Common in builder patterns and jQuery-style APIs.
The value property
Arrow functions

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