READ FILE snippet

read-file.js

function readFile(file: File | null) {
  const reader = new FileReader();

  reader.addEventListener("load", (event) => {
    const result = event.target.result;

    console.log(result);
  });

  reader.addEventListener("progress", (event) => {
    if (event.loaded && event.total) {
      const percent = (event.loaded / event.total) * 100;

      console.log(`Progress: ${Math.round(percent)}`);
    }
  });

  reader.readAsText(file);
}