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hardTechnical2024

Infinite scroll list simulator

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01

Understand the problem

Implement the scenario utility: Infinite scroll list simulator. Discuss edge cases, runtime performance, and alternative paradigms.

js-codingutilityalgorithm
02

Attempt it yourself

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03

Study the solution

💡 How to Think About This Problem

When implementing Infinite scroll list simulator in a frontend interview, candidate developers should focus on structural correctness, managing execution bindings, and minimizing performance overhead.

1. Deconstructing the Requirements

To build a robust solution for **In

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04

Read the code

Example usage
class InfiniteScroll {
  constructor(el, load, threshold = 50) {
    this.el = el;
    this.load = load;
    this.t = threshold;
    this.el.addEventListener('scroll', () => {
      const { scrollTop, scrollHeight, clientHeight } = this.el;
      if (scrollHeight - scrollTop - clientHeight < this.t) this.load();
    });
  }
}

// Example placeholder (requires DOM scroll environment)
// new InfiniteScroll(container, () => console.log('load'));
05

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