What type of linked list is used in the chaining method?

The chaining method usually uses a singly linked list. This is a data structure where each element (node) contains data and a reference to the next element.

Why a singly linked list?

• It allows easy addition of new elements at the end of the chain.
• It simplifies sequential operations where each subsequent step depends on the result of the previous one.

In the context of frontend, for example, when implementing method chaining or middleware (like in Express.js), each element calls the next, passing control further down the chain.

Example of a singly linked list node in JavaScript:

class Node {
  constructor(value) {
    this.value = value;
    this.next = null;
  }
}

// Creating a chain
const first = new Node('step1');
const second = new Node('step2');
first.next = second;

// Traversing the chain
let current = first;
while (current) {
  console.log(current.value);
  current = current.next;
}