how to open a file from javascript code example

Example 1: javascript function to open file browser

const browseFiles = () => {
  var input = document.createElement('input');
  input.type = 'file';
  input.click();
}

Example 2: how to read a file in javascript

fetch('file.txt')
  .then(response => response.text())
  .then(text => console.log(text))
  // outputs the content of the text file