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What else do you get with popover? Let's take the example further. By that, we mean you can close the popover with a close signal, such as clicking outside the popover, keyboard-navigating to another element, or pressing the Esc key. You get "Light Dismiss" out of the box.For more on the top layer, check out this article. You can also see which elements are currently in the top layer through DevTools. It could be deep down nested in the DOM, with clipping ancestors. You don’t have to manage z-index or worry about where your popover is in the DOM. That means it gets promoted above the document in the viewport. When it appears, it gets promoted to the top layer.That gets handled by the popovertoggletarget attribute. You don’t have to write any JavaScript to make it appear.You don’t have to put the popover element into a container or anything-it's hidden by default.See the Pen Pen qBowZXP by web-dot-dev on Codepen The goal being to cover all those common scenarios, saving developers from having to make yet another decision so they can focus on building their experiences. The Popover API aims to cater for many scenarios including tooltips. It also requires research to find an offering that provides everything you need. This requires an extra dependency and more decisions for developers. Hide it by removing the popover element from the DOM.
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Lastly, there is a polyfill under development for the API.
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There is an Origin Trial too for developers that would like to test this out in a production environment. Then enable the "Experimental web platform features" flag. To enable that flag, open Chrome Canary and visit chrome://flags. Where can you use the built-in Popover API now? It's supported in Chrome Canary behind the "Experimental web platform features" flag at the time of writing.
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You can check out the full spec for pop-ups on the OpenUI site. Not require JavaScript for most common behaviors (light dismiss, singleton, stacking, and so on).Make it easy to display an element and its descendants above the rest of the document.
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The built-in Popover API has a variety of goals, all with the same overarching goal of making it easy for developers to build this pattern.
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