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

Ceil-Ian Maralit
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Ceil-Ian Maralit
Front End Web Development Techdegree Graduate 19,434 Points
Posted by Ceil-Ian Maralit
.a{fill-rule:evenodd;}techdegree seal-36
Ceil-Ian Maralit
Front End Web Development Techdegree Graduate 19,434 Points

If statement problems. Help.

Don't know what to put in the if statement to embolden each letter that are typed into the input.

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 (e.target.value === 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

Tomas Svojanovsky
Tomas Svojanovsky
26,680 Points

Hi. You compare index value with button value. Button doesn't have any value. Maybe you want to do something like this i === index? Variable indexText and laws are misleading because the first one is html input and the second one HTMLCollection. So, if you iterate over laws you won't get any law, you will get html element.