Blur and brightness filters in Tailwind - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ rendering

intermediate

What is the visual effect of this Tailwind class?

Look at this HTML snippet using Tailwind CSS:

<div class="blur-sm">Hello</div>

What will you see in the browser?

Tailwind

<div class="blur-sm">Hello</div>

A The text 'Hello' appears sharp and clear with no blur.

B The text 'Hello' is hidden and not visible.

C The text 'Hello' appears very bright and glowing.

D The text 'Hello' appears slightly blurred, making edges soft.

💡 Hint

The class 'blur-sm' applies a small blur filter to the element.

The 'blur-sm' class in Tailwind applies a small blur effect, softening the edges of the text or element. It does not affect brightness or visibility.

📝 Syntax

intermediate

Which Tailwind class correctly applies a brightness filter of 150%?

You want to make an image brighter by 1.5 times using Tailwind CSS. Which class should you use?

A brightness-150

B brightness-[150%]

C brightness-1.5

D brightness-15

💡 Hint

Tailwind has predefined brightness classes including brightness-150 for 150%.

Tailwind provides the 'brightness-[150%]' class which applies brightness(1.5), equivalent to 150%. The class 'brightness-150' is not a default Tailwind class.

❓ selector

advanced

Which Tailwind class combination applies both blur and brightness filters correctly?

You want to blur an element slightly and increase its brightness to 120%. Which class combination is correct?

A blur-sm brightness-[120%]

B blur-sm brightness-120

C blur brightness-120%

D blur-sm brightness-1.2

💡 Hint

Remember that brightness values above 100% require arbitrary values in Tailwind.

The correct way is to use 'blur-sm' for small blur and 'brightness-[120%]' for 120% brightness. Other options either use invalid class names or syntax.

🧠 Conceptual

advanced

What happens if you apply 'brightness-0' in Tailwind CSS?

Consider an image with class 'brightness-0'. What will be the visual result in the browser?

Tailwind

<img src="example.jpg" class="brightness-0" alt="Example image">

A The image appears completely black (no brightness).

B The image appears normal with no brightness change.

C The image appears fully white (maximum brightness).

D The image is hidden and not displayed.

💡 Hint

Brightness 0 means no light is visible.

A brightness filter of 0 means the element is fully dark, so the image appears completely black.

❓ accessibility

expert

How can blur and brightness filters affect accessibility, and what is a good practice?

Using blur and brightness filters can impact how users perceive content. Which practice improves accessibility when using these filters?

A Apply filters only on decorative images without alt text.

B Avoid using any filters because they always reduce accessibility.

C Ensure sufficient color contrast and provide clear text alternatives when filters reduce clarity.

D Use strong blur and brightness filters without fallback text or contrast adjustments.

💡 Hint

Think about users with vision difficulties and how filters might affect readability.

Filters like blur and brightness can reduce clarity. To keep content accessible, maintain good contrast and provide text alternatives so all users can understand the content.