Bookmarklet code to calculate Word Count & Estimated Reading Time

EstimatedReadingTime.js

// Code generated by Bard
// IIFE (Immediately Invoked Function Expression) is used to encapsulate the code within a function to avoid polluting the global namespace and execute it immediately
//default parameter is used to set the initial value of the wordsPerMinute variable to 200 assuming assuming that words-per-minute rate for reading. You can adjust this value based on your preferred reading speed.
javascript:(function(wordsPerMinute = 200) {
  
  // selected text from the webpage is trimmed of any leading or trailing whitespaces
  const selectedText = window.getSelection().toString().trim();
  
  // We proceed to calculate the estimated reading time based on the selected text or all words in the body
  // single ternary expression is used instead of if statements
  // window.getSelection().toString().trim() gets the selected text
  // document.body.innerText.trim() gets the entire text content of the page if nothing is selected
  // The selected or retrieved text is split into an array of words using the regular expression /\s+/
  // The word count is calculated based on the length of the array
  const totalWords = selectedText ? selectedText.split(/\s+/).length : document.body.innerText.split(/\s+/).length;
  
  //Math.ceil() function is used to round the estimated time up to the nearest integer.
  const estimatedTime = Math.ceil(totalWords / wordsPerMinute);
  
  //template literals to format the alert message
  alert(`Word count: ${totalWords}\nEstimated reading time: ${estimatedTime} minutes`);
})();