Backdrop blur (frosted glass) in Tailwind - Practice Problems & Coding Challenges

Challenge - 5 Problems

📝 Syntax

intermediate

Identify the correct Tailwind class for backdrop blur

Which Tailwind CSS class applies a medium level of backdrop blur to create a frosted glass effect?

A blur-md

B backdrop-filter-md

C backdrop-blur-md

D filter-blur-md

💡 Hint

The class starts with 'backdrop' and controls the blur behind an element.

The backdrop-blur-md class applies a medium blur effect to the background behind the element, creating the frosted glass look. The blur-md class blurs the element itself, not the background.

❓ rendering

intermediate

Visual effect of backdrop blur with opacity

What visual effect will you see if you apply backdrop-blur-sm and bg-white/30 on a div over an image background?

A A slightly blurred background behind the div with a translucent white overlay

B The div content becomes blurry but the background stays sharp

C The background image disappears completely

D The div becomes fully opaque white with no blur

💡 Hint

Backdrop blur affects the background behind the element, combined with semi-transparent background color.

The backdrop-blur-sm blurs the background behind the div slightly. The bg-white/30 adds a white color with 30% opacity, making the div look like frosted glass.

❓ selector

advanced

Which Tailwind utility enables backdrop blur effect?

Which Tailwind CSS utility class must be present on a parent or the element itself to enable backdrop blur effects to work properly?

A filter

B backdrop-filter

C backdrop-enabled

D blur-enabled

💡 Hint

This utility activates CSS backdrop-filter property.

The backdrop-filter utility enables the CSS backdrop-filter property, which is required for backdrop blur effects to function. Without it, the blur classes have no effect.

❓ layout

advanced

How to make a frosted glass panel responsive with Tailwind?

You want a frosted glass panel that covers half the screen width on desktop and full width on mobile. Which Tailwind classes achieve this layout with backdrop blur?

A w-full md:w-1/2 backdrop-filter-lg bg-white/40 p-6 rounded-lg

B w-1/2 md:w-full backdrop-blur-lg bg-white/40 p-6 rounded-lg

C w-full md:w-1/2 blur-lg bg-white/40 p-6 rounded-lg

D w-full md:w-1/2 backdrop-blur-lg bg-white/40 p-6 rounded-lg

💡 Hint

Use responsive width classes and correct backdrop blur class.

w-full md:w-1/2 sets full width on small screens and half width on medium and larger. backdrop-blur-lg applies the blur effect. The other options either reverse widths or use invalid classes.

❓ accessibility

expert

Ensuring accessibility with frosted glass effect

When using a frosted glass panel with backdrop blur and semi-transparent background, what is the best practice to maintain good accessibility?

A Ensure sufficient contrast between text and background by adjusting opacity and text color

B Use only white text regardless of background color

C Avoid using any background color to keep text readable

D Disable backdrop blur on all devices to improve readability

💡 Hint

Good contrast helps users with vision difficulties read text easily.

Because backdrop blur and transparency can reduce contrast, it's important to adjust text color and background opacity to keep text readable for all users. Blindly using white text or removing background can harm accessibility.