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HTML Responsive Images Image Delivery with Srcset and Sizes Adding Sizes

Eduardo Vargas
Eduardo Vargas
5,871 Points
Posted by Eduardo Vargas
Eduardo Vargas
5,871 Points

What was the purpose of declaring "max-width: 50% in the CSS when 50VW is being declared in the sizes?

What was the purpose of declaring "max-width: 50% in the CSS when 50VW is being declared in the sizes?

2 Answers

Nikos Papapetrou
Nikos Papapetrou
6,305 Points
Nikos Papapetrou
Nikos Papapetrou
6,305 Points

Percents are relative to the parent element. Assuming you have declared a div to be 80% width and inside the dive you set an image 50%. The 50% is subtract from the 80% percent of the parent element. So 50% is half of the 80% of the div. If you set the image 50vw the image will be relative to the with of the screen.

Timothy Mattingly
Timothy Mattingly
15,934 Points
Timothy Mattingly
Timothy Mattingly
15,934 Points

The CSS setting is saying to place the image in a space that is half the size of its parent div, the wrapper. The 50% vw setting in sizes is telling the browser to find an image in srcset based on a pixel ratio that is half the viewport size.