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IntersectionObserver - Web APIs | MDN
The IntersectionObserver interface of the Intersection Observer API provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport. The ancestor element or viewport is referred to as the root.

When an IntersectionObserver is created, it's configured to watch for given ratios of visibility within the root. The configuration cannot be changed once the IntersectionObserver is created, so a given observer object is only useful for watching for specific changes in degree of visibility; however, you can watch multiple target elements with the same observer.
web  standard  api  intersection  observer  lazy  load  loading  images 
4 hours ago by pioneerskies
Whatever happened to the Semantic Web? • Two Bit History
Sinclair Target:
<p>the Semantic Web we were promised has yet to be delivered. In 2018, we have “agents” like Siri that can do certain tasks for us. But Siri can only do what it can because engineers at Apple have manually hooked it up to a medley of web services each capable of answering only a narrow category of questions. An important consequence is that, without being large and important enough for Apple to care, you cannot advertise your services directly to Siri from your own website. Unlike the physical therapists that Berners-Lee and his co-authors imagined would be able to hang out their shingles on the web, today we are stuck with giant, centralized repositories of information. Today’s physical therapists must enter information about their practice into Google or Yelp, because those are the only services that the smartphone agents know how to use and the only ones human beings will bother to check. The key difference between our current reality and the promised Semantic future is best captured by this throwaway aside in the excerpt above: “…appointment times (supplied by the agents of individual providers through their Web sites)…”

In fact, over the last decade, the web has not only failed to become the Semantic Web but also threatened to recede as an idea altogether. We now hardly ever talk about “the web” and instead talk about “the internet,” which as of 2016 has become such a common term that newspapers no longer capitalize it. (To be fair, they stopped capitalizing “web” too.) Some might still protest that the web and the internet are two different things, but the distinction gets less clear all the time. The web we have today is slowly becoming a glorified app store, just the easiest way among many to download software that communicates with distant servers using closed protocols and schemas, making it functionally identical to the software ecosystem that existed before the web. How did we get here?</p>
semantic  web  history  internet 
4 hours ago by charlesarthur

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