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JavaScript DOM Scripting By Example Editing and Filtering Names Fix DOM Manipulation Code

Arsal Abdullah
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Arsal Abdullah
Front End Web Development Techdegree Student 9,748 Points

Hey guys, im struggling to find the correct answer on this one. Can anyone enlighten me as to what it is? Thanks so much

Hey guys, im struggling to find the correct answer on this one. Can anyone enlighten me as to what it is? Thanks so much

app.js
const laws = document.getElementsByTagName('li');
const indexText = document.getElementById('boldIndex');
const button = document.getElementById('embolden');

button.addEventListener('click', (e) => {
    const index = parseInt(indexText.value, 10);

    for (let i = 0; i < laws.length; i += 1) {
       let law = laws[i];

       // replace 'false' with a correct test condition on the line below
       if (law=index) {

           law.style.fontWeight = 'bold';
       } else {
           law.style.fontWeight = 'normal';
       }
    }
});
index.html
<!DOCTYPE html>
<html>
<head>
  <title>Newton's Laws</title>
</head>
<body>
  <h1>Newton's Laws of Motion</h1>
  <ul>
    <li>An object in motion tends to stay in motion, unless acted on by an outside force.</li>
    <li>Acceleration is dependent on the forces acting upon an object and the mass of the object.</li>
    <li>For every action, there is an equal and opposite reaction.</li>
  </ul>
  <input type="text" id="boldIndex">
  <button id="embolden">Embolden</button>
  <script src="app.js"></script>
</body>
</html>

2 Answers

Steven Parker
Steven Parker
216,175 Points

The variable "law" refers to an element. It doesn't make sense to compare that to an index value.

Instead, compare the index to the loop control variable ("i") so only the matching one gets marked.