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Marcelo Pereira
12,169 PointsDOM scripting by examples, challenge task 1of 1
if statement
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 (indexText === law) {
law.style.fontWeight = 'bold';
} else {
law.style.fontWeight = 'normal';
}
}
});
<!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

Liam Clarke
19,887 PointsHi Marcelo
You've got the right idea. In your condition, you're seeing if the indexText === laws[i], however, what you want to do is have a conditional that checks if the index value is equal to laws list number
In your condition: law is never equal to indexText, as this is what they both equal.
indexText = document.getElementById('boldIndex');
law = document.getElementsByTagName('li')[i];
What you need to do is get the value of law and the value of the indexText
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); // This is the value of indexText
for (let i = 0; i < laws.length; i += 1) { // i is the value of the the iterable list item
let law = laws[i];
if ( index === i ) {
law.style.fontWeight = ' bold';
} else {
law.style.fontWeight = 'normal';
}
}
});
Hope this makes sense
Good Luck

Marcelo Pereira
12,169 Pointsthank you for you help .