Advanced
HTML & CSS
Q94 / 100
What is the significance of the "loading" attribute value "lazy" on an <iframe>, and what is a potential downside if applied to above-the-fold content?
Correct! Well done.
Incorrect.
The correct answer is B) It defers loading the iframe's content until it is near the viewport, improving initial page load performance; however, applying it to above-the-fold iframes can delay the appearance of important visible content, hurting perceived performance
B
Correct Answer
It defers loading the iframe's content until it is near the viewport, improving initial page load performance; however, applying it to above-the-fold iframes can delay the appearance of important visible content, hurting perceived performance
Explanation
Lazy loading is beneficial for off-screen resources to reduce initial load cost, but applying it to content visible immediately on load can counterproductively delay rendering of that content.
Progress
94/100