css - javascript image cropping/resizing -

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OK, it is not certain what is technically called or how it is done.

But how will you make big images - go about getting landscapes and pictures and shaping them, so that they really fit the dimensions of a particular divis without losing aspect ratio?

You can use to create image scale and cover the entire element at the same time Are there. Just note that you need to set the image as a background image: 

  background-image: url (...); Background size: cover;

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