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

Please point me in the direction of understanding how to make the input value affect <li> index? Select <ul> children?

I've tried adding a const ul to select <ul> then after the if statement trying

if ( law <= 2) ul.children[index] = law law.style.fontweight = 'bold'

But it doesn't work either.

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 <= 2 ) {
          let law = indexText.value;
           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>

1 Answer

Simon Coates
Simon Coates
28,692 Points

You may need to undo your changes, but the answer is super simple. try

if (index === i) {

nb: If you look at https://teamtreehouse.com/community/code-challenge:16852 it seems that a few of the other users stumped by this challenge over complicated things.