October 2017
Intermediate to advanced
370 pages
8h 57m
English
Content preview from AMP: Building Accelerated Mobile Pages
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Placeholders
An element with the placeholder attribute acts as a placeholder for its parent. Placeholders are displayed immediately for an element, before the element has been downloaded or initialized. When the actual element is ready, the placeholder is hidden, and the element content is displayed.
Thus, placeholders can be used to stand in place of a slower-to-load element. You might use this, for instance, to display a fast-loading, low-resolution image in place of a video or high-resolution image. The latter is the same trick that sites such as Medium (medium.com) and Facebook use to deliver a quick page-loading experience. They show a small, low-resolution image that has been blown up to the size of the actual banner image. The user ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.