![experimental webkit features experimental webkit features](https://cdn.macrumors.com/article-new/2018/01/ios12compatibledevices-1.jpg)
The company detailed the WebKit changes in the release in a detailed post to the WebKit blog. Let’s now take a look at the entries that get passed to the callback each time it is invoked. Apple added some 13 new WebKit features in Safari 11.1 and macOS 10.13.4, which shipped last week. What if we want to know when all or most of an element is visible, not just any portion of it? We can specify an intersection threshold when constructing the observer: observer = new IntersectionObserver( callback, ) We’ll get a callback as soon as any portion of the target intersects the viewport, and we’ll get another callback as soon as the target has no intersection with the viewport. We pass the IntersectionObserver constructor the callback function we want it to use. In the example above, we haven’t specified a root element so we’re observing intersections with the viewport. Var observer = new IntersectionObserver( callback) On macOS its easy to reset, but this feature isnt present on iOS :- (. Always too much temptation to experiment, and then regret when something doesnt work. Select ‘Experimental Features’ and turn off all features. Could anyone possibly share the experimental webkit features DEFAULT SETTINGS. Go to the bottom of the page and press ‘Advanced’. Scroll down and press ‘Safari’ to enter the Safari menu. Here’s a simple example to get started: var intersectionCount = 0 In this case, you must turn off all Safari experimental features by following the procedure below. WebKit is a browser engine developed by Apple and primarily used in its Safari web browser, as well as all iOS web browsers. When the intersection of a target and root crosses a specified threshold, the observer invokes a callback. API OverviewĮach IntersectionObserver has a set of target elements and observes the intersection of these targets with a particular root element or with the viewport. In a nutshell: Apple has pushed out an important security fix for iPhones, iPads, Apple Watch, and Macs to address a memory corruption bug with the companys WebKit browser engine.
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The IntersectionObserver API offers a better solution to this problem, and is now available in Safari Technology Preview, macOS 10.14.4 beta, and iOS 12.2 beta. Some explanation: For each property, I state the support: WebKit means that it is available only in browsers that use the WebKit engine (Safari, Chrome, iPhone, iPad, Android), and Gecko indicates the availability in Firefox and the like.Finally, certain properties are part of the official CSS 2.1. However, polling is inefficient, wastes battery life, and doesn’t work for cross-origin content. A common way to solve this problem is using polling, periodically computing the position of an element with respect to the viewport. Or we might want to defer loading an image until it is visible. The element could be an ad or a video whose viewability we want to compute. Web authors often need to know when a particular element on a page becomes visible.