infinite scrolling in typescript

  1. Create a variable to keep track of the current page number
index.ts
let currentPage: number = 1;
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  1. Add an event listener to the window that checks if the user has scrolled to the bottom of the page
index.ts
window.addEventListener('scroll', () => {
  if (window.innerHeight + window.scrollY >= document.body.offsetHeight) {
    // user has scrolled to the bottom of the page
  }
});
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  1. Inside the event listener, increment the currentPage variable and make an API call to fetch the next set of data
index.ts
window.addEventListener('scroll', () => {
  if (window.innerHeight + window.scrollY >= document.body.offsetHeight) {
    currentPage++;
    fetchData();
  }
});

function fetchData() {
  // make an API call to fetch data for the current page
}
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  1. Append the fetched data to the current list of items
index.ts
function fetchData() {
  // make an API call to fetch data for the current page
  fetch(`https://exampleapi.com/data?page=${currentPage}`)
    .then(response => response.json())
    .then(data => {
      // append the new data to the current list of items
      items.push(...data);
    });
}
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  1. Update the view to display the new items
index.ts
function fetchData() {
  // make an API call to fetch data for the current page
  fetch(`https://exampleapi.com/data?page=${currentPage}`)
    .then(response => response.json())
    .then(data => {
      // append the new data to the current list of items
      items.push(...data);

      // update the view to display the new items
      renderItems();
    });
}

function renderItems() {
  // update the view to display the current list of items
}
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