**`Bootstrap`** is a CSS framework built with a collection of HTML, CSS, and JavaScript tools to build scalable web applications.

##      
### What is breadcrumb on a webpage?
A **`Breadcrumb`** is a bootstrap component that is used to show the current location of the web page to a user.

### Code



<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" 
    integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3"
     crossorigin="anonymous">
    
</head>
<body class="mt-5 mr-3">
  <nav style="--bs-breadcrumb-divider: '>';" aria-label="breadcrumb">
    <ol class="breadcrumb">
      <li class="breadcrumb-item"><a href="#">Home</a></li>
      <li class="breadcrumb-item "><a href="#">Library</a></li>
      <li class="breadcrumb-item"><a href="#">about us</a></li>
      <li class="breadcrumb-item active"  aria-current="page">History</li>
    </ol>
  </nav>
  

    
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" 
        integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" 
        crossorigin="anonymous">
    </script>
</body>
</html>

document.addEventListener("DOMContentLoaded", function () {
  pTag = document.querySelector("div");
  newVal = document.createElement("p");
  newVal.innerHTML = 'Hello, Hello';
  pTag.appendChild(newVal);
});

// Async Tests Example
/*
window.onModulesLoaded = new Promise( function( resolve, reject ) {
  setTimeout(function() {
    pTag = document.querySelector("div");
    pTag.innerHTML = '';
    newVal = document.createElement("p");
    newVal.innerHTML = 'Hello World';
    pTag.appendChild(newVal);
    resolve();
  }, 100)
});
*/

var TestResult = function() {
  this.succeeded = false;
  this.reason = "";
  this.input = "";
  this.expected_output = "";
  this.actual_output = "";
};

var executeTests = function(
  userJsCode,
  userCssCode,
  userHtmlCode,
  userHtmlPage
) {
  var results = [];

  const jsdom = require("jsdom");
  const { JSDOM } = jsdom;
  const dom2 = new JSDOM(userHtmlPage, { runScripts: "dangerously" });

  const pTag = dom2.window.document.querySelector("p");

  const result = new TestResult();
  result.expected_output = "Hello World";
  result.input = "Html page";

  if (!pTag) {
    result.actual_output = "null";
    result.succeeded = false;
    result.reason = "No p tag found";
  } else {
    const pTagText = pTag ? pTag.textContent : "";
    result.actual_output = pTagText;
    if (pTagText.trim() != "Hello World") {
      result.reason = "Expected output (Hello World in a p tag) did not match";
      result.succeeded = false;
    } else {
      result.succeeded = true;
      result.reason = "Found p tag with Hello World";
    }
  }

  results.push(result);

  return results;
};

// Async Tests Example
/*
var executeTestsAsync = function(
  userJsCode,
  userCssCode,
  userHtmlCode,
  userHtmlPage
) {
  var results = [];
  return new Promise(resolve => {

    const jsdom = require("jsdom");
    const { JSDOM } = jsdom;
    const dom2 = new JSDOM(userHtmlPage, { runScripts: "dangerously" });

    if (!dom2.window.onModulesLoaded) {
      console.log("window.onModulesLoaded not found!");
    	resolve(results);
    }
    dom2.window.onModulesLoaded.then(()=>{
      const pTag = dom2.window.document.querySelector("p");

      const result = new TestResult();
      result.expected_output = "Hello World";
      result.input = "Html page";

      if (!pTag) {
        result.actual_output = "null";
        result.succeeded = false;
        result.reason = "No p tag found";
      } else {
        const pTagText = pTag ? pTag.textContent : "";
        result.actual_output = pTagText;
        if (pTagText.trim() != "Hello World") {
          result.reason = "Expected output (Hello World in a p tag) did not match";
          result.succeeded = false;
        } else {
          result.succeeded = true;
          result.reason = "Found p tag with Hello World";
        }
      }

      results.push(result);
      resolve(results);
    });
  });
};
*/

What are breadcrumbs in bootstrap?

What is breadcrumb on a webpage?

Code