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

Posted by Naeem Hasan
Naeem Hasan
Courses Plus Student 6,344 Points

what is the condition ?i can't figureout

i am trying almost 20-25 min. but i am not able to find this answer..

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 (true) {
          law.textContent = i;
           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

Omar Ramirez
seal-mask
.a{fill-rule:evenodd;}techdegree
Omar Ramirez
Full Stack JavaScript Techdegree Student 2,922 Points
Omar Ramirez
.a{fill-rule:evenodd;}techdegree
Omar Ramirez
Full Stack JavaScript Techdegree Student 2,922 Points

Hi Naeem. From what I can see your almost there! indexes start from 0, 1, 2, etc. the for loop is indexing through your <li> items. so when it hits 0, if that matches your inputted text, then you want to change the font weight to 'bold'. so change the the if (false) statement to if (i === index). Because your index is the result of what you enter into the indexText variable. ( I hope that makes sense ). 

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 === index) {

           law.style.fontWeight = 'bold';
       } else {
           law.style.fontWeight = 'normal';
       }
    }
});
Naeem Hasan
PLUS
Naeem Hasan
Courses Plus Student 6,344 Points
Naeem Hasan
Naeem Hasan
Courses Plus Student 6,344 Points

thanks ,you are great!!