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

Nebojsa Stevanovic
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.a{fill-rule:evenodd;}techdegree
Nebojsa Stevanovic
Full Stack JavaScript Techdegree Student 9,620 Points

i don't think that i understand what i need to do here...

i don't think that i understand what i need to do here...

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.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>

5 Answers

The goal is to "embolden the list item with the corresponding index"

The index entered by the user is provided as:

const index = parseInt(indexText.value, 10);

After this the list items are looped through using index i

So if i matches the index entered by the user the list item should be emboldened.

Close. laws[i] is an element. You want to use the index of that element which is just i

Also you need a comparison operator instead of the assignment operator.

Nebojsa Stevanovic
seal-mask
.a{fill-rule:evenodd;}techdegree
Nebojsa Stevanovic
Full Stack JavaScript Techdegree Student 9,620 Points

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 (index= laws[i]) {

       law.style.fontWeight = 'bold';
   } else {
       law.style.fontWeight = 'normal';
   }
}

});

i am close ??

Nebojsa Stevanovic
seal-mask
.a{fill-rule:evenodd;}techdegree
Nebojsa Stevanovic
Full Stack JavaScript Techdegree Student 9,620 Points

omg.. i got it finally.. ```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 (index===i) {

       law.style.fontWeight = 'bold';
   } else {
       law.style.fontWeight = 'normal';
   }
}

});``` thank youu

Yeah. It's one of those challenges that once you see it you are surprised at how much easier it is than you originally thought.