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Learn how to dynamically color table cells in JavaScript based on specific conditions using CSS. Discover clear, easy-to-follow instructions for adding styles to your table.
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This video is based on the question https://stackoverflow.com/q/63735780/ asked by the user 'Crocs123' ( https://stackoverflow.com/u/14136137/ ) and on the answer https://stackoverflow.com/a/63735847/ provided by the user 'brk' ( https://stackoverflow.com/u/2181397/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Color Certain Table Cells Based on JavaScript Calculations

Creating dynamic tables using JavaScript can be a fun and useful way to display data. However, if you want to highlight specific cells based on certain criteria, it can get a bit tricky. In this guide, we're going to tackle a common question: how to color table cells that meet specific conditions. Specifically, we'll focus on a case where we want to color cells green when the calculated number equals 10.

Understanding the Problem

Suppose you have a JavaScript array and you are generating a multiplication table based on its values. You want to highlight the table cells when the multiplication result equals 10. The key question is: How can you integrate CSS with JavaScript to achieve this?

Let's say you are already generating a table using a simple loop. Here is how your current code looks:

[[See Video to Reveal this Text or Code Snippet]]

This code generates a simple multiplication table, but it doesn't have any highlighting based on the condition we are interested in. Let's explore how we can implement this feature!

Step-by-Step Solution

To achieve coloring the specific cells, we'll follow these steps:

Modify the Loop: Add a conditional statement inside your loop to check if the calculated value equals 10.

Add a CSS Class: If the condition is met, apply a CSS class that will set the background color of the table cell.

Define CSS Styles: Create a CSS rule that styles cells with the class applied.

1. Modify the Loop

We will add a conditional statement to check if the product equals 10 and add a class accordingly. Here’s how our modified code looks:

[[See Video to Reveal this Text or Code Snippet]]

2. Add a CSS Class

Now, we need to create a CSS class that will style our highlighted cells. In this case, we are looking to have a green background color for cells where the product is 10. Here’s how you can define that CSS class:

[[See Video to Reveal this Text or Code Snippet]]

3. Putting It All Together

Now that we have our JavaScript and CSS in place, your full implementation will look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following the steps outlined above, you can dynamically color table cells based on specific calculations. This not only enhances the visual appeal of your tables but also inverts them into more interactive components for your web applications. Don’t hesitate to experiment with different styles and conditions to suit your project needs! Happy coding!