Fix Image Swap Errors in jQuery

It looks like I’ve made an error in my jQuery code while trying to dynamically update the image source based on the value in the table cell. My goal is to swap out the image in the <td> element with id="td1" depending on whether the number in the adjacent <td> is greater than 5. However, the jQuery syntax here isn’t correct. Specifically, I’ve missed adding a comma in the attr() function and the syntax for setting the src attribute based on a condition isn’t right.

Error Code:

code<table>
  <tr>
    <td>6</td>
    <td id="td1">
      <img />
    </td>
  </tr>
</table>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
  $('#td1 img').attr('src', function() {
    // Parse the number in the previous <td> and check if it's greater than 5
    return parseInt($(this).parent().prev().html()) > 5 
      ? '/images/clubsTiny.png' 
      : '/images/blkCross.png';
  });
</script>

Explanation of the Solution:

To solve the issue, we need to fix the syntax error in the jQuery code and clarify the logic for setting the src attribute based on the cell value. The original code is close, but it’s missing a comma and has an incorrect structure in the attr() function.

Corrected Code:

code<table>
  <tr>
    <td>6</td>
    <td id="td1">
      <img />
    </td>
  </tr>
</table>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
  $('#td1 img').attr('src', function() {
    // Parse the number in the previous <td> and check if it's greater than 5
    return parseInt($(this).parent().prev().html()) > 5 
      ? '/images/clubsTiny.png' 
      : '/images/blkCross.png';
  });
</script>

Explanation of the Solution:

1. Structure Correction:
   • In the attr() method, we set the src attribute directly by providing it with two arguments: the attribute name ('src') and a function that determines its value.
   • The original code mistakenly used a syntax that combined strings with commas, which doesn’t work in jQuery.
2. Condition Logic:
   • Inside the function provided to attr(), we use parseInt() to convert the text in the previous <td> to a number.
   • We then check if this number is greater than 5.
   • If it is, the src is set to '/images/clubsTiny.png'; otherwise, it’s set to '/images/blkCross.png'.

Final Thought:

With this corrected code, the image in the <td> with id="td1" will change based on the numeric value in the previous cell. You can now expand this to dynamically load images based on real data from a database, ensuring you pass the correct value dynamically to the <td> where it checks the condition. This small change sets up the code to work correctly with jQuery’s syntax, ensuring the logic is both readable and effective.