In particular, you can use the background-size property to resize background images. You can also resize background images using CSS. thumbnail if you want the class applied to all elements that use that class. Feel free to change img.thumbnail to just. You would need to use something like video.thumbnail in your stylesheet for video thumbnails. This prevents you from inadvertently applying the class to the wrong element in the event that another element uses a class of the same name.įor example, if a video element had class="thumbnail", the above class won't be applied to it. By doing this, I'm specifying that only img elements that use the thumbnail class will have those styles applied. What I mean is, I've used img.thumbnail in the CSS. You might notice that I've prefixed the class name with img. Therefore, images with that class will be sized using those explicit dimensions instead. However, it also sets a class for thumbnails (called thumbnail) which explicitly sets their width and height.
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