Chromium Blog

Chrome 57 Beta: CSS Grid Layout, Improved Add to Home screen, Media Session API

Thursday, February 2, 2017

Unless otherwise noted, changes described below apply to the newest Chrome Beta channel release for Android, Chrome OS, Linux, Mac, and Windows.

CSS Grid Layout
Sites are increasingly being accessed on screens of all sizes, from large LCD TVs to tiny watch faces. Historically, supporting all of these screen sizes required complex combinations of markup and CSS, making code hard to maintain. To give developers more granular control over how elements grow and shrink to fit the current screen size, CSS Grid Layout is now available.

CSS Grid supports a two-dimensional grid-based layout system, optimized for responsive user interface design. Elements within the grid can be specified to span multiple columns or rows. Elements positioned in a CSS grid can also be named, making layout code easier to understand. Screenshot 2025-08-04 20.06.19.png

CSS Grid allows developers to arbitrarily place elements on a grid with full control over element flow, sizing behavior and responsiveness. 珍宝大战高清720p下载中文字幕珍宝大战种子MP
Update (2017/03/09): Improved Add to Home screen is now planned to launch in Chrome 58.
Since early versions of Chrome for Android, users have been able to add sites to their Home screen for fast and convenient access. This feature adds the icons using Android shortcuts, which means that web apps don’t show up throughout Android in the same way as installed native apps.

In this release, when a user adds a Progressive Web App to their Home screen, Chrome will integrate it into Android in a much deeper way. For example, Progressive Web Apps will now appear in the app drawer section of the launcher and in Android Settings, and will be able to receive incoming intents from other apps. Long presses on their notifications will also reveal the normal Android notification management controls rather than the notification management controls for Chrome. Media Session API Media consumption is one of the most common uses for the mobile web. In Chrome for Android, developers can customize the lock screen UI and notifications with media content using the new Media Session API. By providing metadata to the browser about the content being played, developers can create rich lock screen messaging that includes information such as title, artist, album name, and artwork. Additionally , the site is now able to respond to user actions taken on the notification itself, such as seeking or skipping.

Other features in this release

The WebAssembly API has been enabled by default, allowing developers to run near-native code in the browser without a plugin.

When a video enters fullscreen on an Android device, Chrome now automatically locks the screen orientation according to the aspect ratio of the video.

Sites using continuous setTimeout() will now be throttled when using loops to drive out-of-view frame animations, improving performance for users.

The Fetch API Response class now supports the .redirected attribute to help web developers avoid untrustworthy responses and reduce the risk of open redirectors.

The new padStart and padEnd formatting tools enable text padding, facilitating tasks like aligning console output or printing numbers with a fixed number of digits.

Service Worker Navigation Preload is now available as an Origin Trial, allowing developers to parallelize the network request for the main resource alongside service worker startup.

The Payment Request API can be made available inside an iframe by adding the allowpaymentrequest attribute.

PaymentMethodData now supports basic-card, so developers can refer to all card types with a single method identifier, rather than individual data types.

To simplify the migration from HTTP to HTTPS, stored credentials for HTTP forms are now transferred to the HTTPS version of the site, and the Credential Management API now supports filling credentials from matching subdomains.

The caret-color property enables developers to specify the color of the text input cursor.

To preserve consistency with other on<event> attributes, ongotpointercapture and onlostpointercapture are now part of the GlobalEventHandlers mixin.

Support is now available for text-decoration-skip: ink to make underlines skip descenders, the portion of letters that extend below the text's baseline.

New text-decoration properties are now available, allowing developers to specify visual effects such as line color and style.

The PresentationRequest constructor has been modified to accept multiple URLs via a sequence<DOMString>, in addition to the existing constructor that takes a single URL.

The new AudioContext.getOutputTimestamp() method enables developers to synchronize DOMHighResTimeStamp and AudioContext.currentTime values.

AudioBufferSourceNode, OscillatorNode, and ConstantSourceNode now inherit from AudioScheduledSourceNode, consolidating functionality.

The new cancelAndHoldAtTime function cancels future AudioParam events with times greater than or equal to cancelTime, allowing developers to preserve the value of the scheduled time in a direct way.

Developers can now construct WebAudio-specific events such as OfflineAudioCompletionEvent and AudioProcessEvent.

To increase user security, Chrome's XSS Auditor now blocks entire suspicious pages by default, rather than selectively filtering out the suspected reflected XSS on the page.

Deprecations and interoperability improvements

Support for the <keygen> element has been removed, causing it to no longer display any controls nor submit form element data, to align with other browsers.

As previously announced, locally-trusted SHA-1 certificates will now result in a certificate error page unless the EnableSha1ForLocalAnchors enterprise policy has been set.

fieldset.elements now returns an HTMLCollection instead of an HTMLFormControlsCollection to better align with spec.

The <cursor> element has been removed, but but cursor icons can still be set via the cursor CSS property.

A legacy caller has been removed from HTMLEmbedElement and HTMLObjectElement, so the interfaces will now throw exceptions rather than having their instances called as functions.

The usemap attribute now requires case-sensitive matching.

All -webkit- prefixed IndexedDB global aliases have been removed, after their deprecation in M38.

Custom message events and events created by client.postMessage(message, transfer) in a service worker will now use MessageEvent instead of ServiceWorkerMessageEvent, following the HTML MessageEvent spec extension.

Support for webkitClearResourceTimings(), webkitSetResourceTimingBufferSize(), and onwebkitresourcetimingbufferfull has been removed from the Performance interface, in favor of clearResourceTimings(), setResourceTimingBufferSize(), and onresourcetimingbufferfull.

The following -internal CSS selectors are being deprecated: -internal-media-controls-cast-button, -internal-media-controls-overlay-cast-button, and all of the -internal-media-controls-text-track-list selectors.

Support for the obsolete API webkitCancelRequestAnimationFrame has been removed in favor of cancelAnimationFrame.

On Android, wordWrap: break-word and -webkit-line-break: after-white-space will no longer be set on contenteditable containers by default, to preserve consistency between browsers.

The webkit prefix has been removed from AudioContext and OfflineAudioContext.

Posted by Xi Han, Home Screen Heroine

Integrating Progressive Web Apps deeply into Android

Thursday, February 2, 2017

In 2015, we added a new feature to Chrome for Android that allows developers to prompt users to add their site to the Home screen for fast and convenient access. That feature uses an Android shortcut, which means that web apps don’t show up throughout Android in the same way as installed native apps. For example, many developers have asked for their web app to show up in the app drawer section of the launcher. These differences can be confusing for users and prevent the experience from feeling as cohesive as it could.

In the next few weeks we’ll be rolling out a new version of this experience in Chrome beta. With this new version, once a user adds a Progressive Web App to their Home screen, Chrome will integrate it into Android in a much deeper way than before. For example, Progressive Web Apps will now appear in the app drawer section of the launcher and in Android Settings, and will be able to receive incoming intents from other apps. Long presses on their notifications will also reveal the normal Android notification management controls rather than the notification management controls for Chrome.

This new Add to Home screen feature is one more step in our journey to empower developers to build the best possible experience for their users, and we are committed to ensuring the same mechanisms for installing Progressive Web Apps are available to all browsers on Android.

Posted by Yaron Friedman, Add to Home screen aficionado

喝红酒有什么好处	解表化湿是什么意思	天蝎座和什么星座最不配	小白兔是什么意思	舌苔白是什么原因
尿胆原弱阳性什么意思	伤口恢复吃什么好得快	神经性皮炎用什么药膏好	鸡飞狗跳是什么意思	ra是什么病的缩写
什么的青草	脚背疼挂什么科	ideal是什么意思	88岁属什么生肖	otto是什么意思
头晕吃什么食物好	气血两亏是什么意思	曼波是什么意思	长江后浪推前浪是什么意思	十点半是什么时辰

心慌气短吃什么药hcv8jop5ns3r.cn	梦到高考是什么意思hcv8jop1ns6r.cn	osprey是什么牌子hcv8jop3ns6r.cn	什么是经络shenchushe.com	下午3点到4点是什么时辰hcv9jop0ns3r.cn
1.15是什么星座hcv8jop1ns8r.cn	体虚是什么原因引起的hcv9jop4ns3r.cn	心理健康是什么hcv9jop1ns6r.cn	促甲状腺激素偏高是什么意思hcv8jop0ns1r.cn	横眉冷对是什么意思hcv8jop1ns7r.cn
为什么医院不推荐钡餐检查hcv8jop9ns7r.cn	阳气最强的树是什么树hcv9jop5ns2r.cn	adidas是什么牌子dajiketang.com	例假推迟是什么原因引起的hcv8jop6ns2r.cn	窦性心律是什么意思hcv8jop5ns7r.cn
special是什么意思zsyouku.com	膜拜是什么意思hlguo.com	白化病是什么hcv7jop6ns2r.cn	处女座属于什么星象hcv7jop5ns3r.cn	ph值高是什么原因tiangongnft.com

百度

Chromium Blog

Chrome 57 Beta: CSS Grid Layout, Improved Add to Home screen, Media Session API

Integrating Progressive Web Apps deeply into Android

Labels

Archive

Feed