When designing for mobile-first, it's recommended to start with a ________ viewport width in CSS before adjusting for larger screens.
- initial-scale
- maximum-scale
- minimum-scale
- width=device-width
When designing for mobile-first, it's crucial to set the viewport width using width=device-width to ensure proper scaling on various devices and screens.
To delay the start of a CSS animation, the property animation-________ is used.
- delay
- duration
- iteration-count
- timing
The correct property is animation-delay, which allows you to specify a time value or keyword to delay the start of the animation. It is crucial for timing and synchronization in CSS animations.
In terms of performance, what are the considerations when choosing between using a large number of small CSS files versus a few large CSS files?
- Enhanced browser rendering
- Faster initial load times
- Improved caching mechanisms
- Reduced server requests
Using a few large CSS files reduces the number of server requests, which can improve performance by reducing latency. However, it's crucial to balance this with the benefits of caching and parallel downloads for smaller files.
What is the main difference between CSS Grid and Flexbox in terms of layout direction?
- Grid allows bidirectional layout, while Flexbox is unidirectional.
- Flexbox allows bidirectional layout, while Grid is unidirectional.
- Grid and Flexbox both support bidirectional layout.
- There is no difference in terms of layout direction.
The correct option is Grid allows bidirectional layout, while Flexbox is unidirectional. CSS Grid is designed for two-dimensional layout, allowing control over both rows and columns, while Flexbox is primarily for one-dimensional layout along a single axis.
For responsive typography, the ________ unit is often used to adjust font size relative to the viewport width.
- vw
- em
- px
- %
The correct option is vw (viewport width). This unit allows you to set the font size in relation to the width of the viewport. For responsive design, using vw ensures that the text scales appropriately based on the user's device screen.
What is the main purpose of the CSS cascade?
- Applying styles to HTML elements
- Cascading styles to child elements
- Determining the priority of styles
- Sorting styles alphabetically
The CSS cascade determines the priority of styles, allowing the browser to resolve conflicting styles.
When designing a button that needs to change its background from a solid color to a gradient on hover, what approach should be used to ensure smooth transition and browser compatibility?
- Apply a keyframe animation on background
- Use the :hover pseudo-class with a CSS transition on background-image
- Use the transition property on background-color
- Utilize JavaScript for the hover effect
To ensure a smooth transition and broad browser compatibility, use the :hover pseudo-class with a CSS transition on background-image. This approach leverages native browser rendering for optimal performance.
What is the default value of the flex-direction property in a Flexbox container?
- column
- column-reverse
- row
- row-reverse
The default value of the flex-direction property is row, which arranges items in a row along the main axis.
How do you set a gradient that transitions from left to right?
- background: gradient(left right, color1, color2)
- background: linear-gradient(left, color1, color2)
- gradient: left-to-right(color1, color2)
- linear-gradient(right, color1, color2)
To set a gradient that transitions from left to right, use the background: linear-gradient(left, color1, color2) property. This ensures the gradient starts from the left side and progresses to the right side of the element.
In a scenario where an element should remain fixed at the top of the viewport upon scrolling, but only after the user scrolls past a certain point, which CSS positioning scheme would be most appropriate?
- position: absolute; top: 0;
- position: fixed; top: 0;
- position: relative; top: 100px;
- position: sticky; top: 100px;
The position: sticky; property is ideal for creating an element fixed at the top after a certain scroll point. It combines features of both fixed and relative positioning, providing a seamless effect as the user scrolls.