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

ron rockah
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ron rockah
Full Stack JavaScript Techdegree Graduate 16,422 Points
Posted by ron rockah
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ron rockah
Full Stack JavaScript Techdegree Graduate 16,422 Points

I dont understand the task

i really cant understand the task, hope that someone could explain more to me;

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 (i === 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

Jason Larson
Jason Larson
8,361 Points

Based on what you put in, it looks like you understand the task, you just need a nudge in the right direction to get your code correct. You do want to compare i to the value that's in the text box, but you can't do it the way you have it because you're trying to compare an int to a string. You'll notice in the code that is given to you that they have already converted the value of the textbox into an integer and assigned it to the variable index, so compare i to that variable and it should work.