From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- files/zh-cn/mozilla/firefox/releases/56/index.html | 129 +++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 files/zh-cn/mozilla/firefox/releases/56/index.html (limited to 'files/zh-cn/mozilla/firefox/releases/56') diff --git a/files/zh-cn/mozilla/firefox/releases/56/index.html b/files/zh-cn/mozilla/firefox/releases/56/index.html new file mode 100644 index 0000000000..e7e2870e37 --- /dev/null +++ b/files/zh-cn/mozilla/firefox/releases/56/index.html @@ -0,0 +1,129 @@ +--- +title: Firefox 56 for developers +slug: Mozilla/Firefox/Releases/56 +translation_of: Mozilla/Firefox/Releases/56 +--- +
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本文介绍了一些在Firefox 56中的一些改进，这些改进会对开发者们产生影响。Firefox 56是当前Firefox的Beta版，预计在2017年9月26日正式发布。

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针对网页开发者们的若干改变

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开发者工具

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  • 在CSS格检查器中显示以负号开始的行号({{bug(1369942)}}).
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HTML

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  • 在打标签的窗体控件中采用labels 属性，比如 {{domxref("HTMLInputElement.labels")}} ({{bug(556743)}}).
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  • 实现了 <link rel="preload">; 更详细的内容，可以参见 Preloading content with rel="preload"  ({{bug(1222633)}}). 需要注意的是，当前的Firefox只支持对可缓存的资源进行预加载。
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CSS

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  • 实现了Mozilla自有的属性 {{cssxref("<color>")}} 值为 -moz-win-accentcolor 以及 -moz-win-accentcolortext (可以参见 {{bug(1344910)}}), 以及专用的媒体查询语句 -moz-windows-accent-color-in-titlebar (参见{{bug(1379938)}}).
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SVG

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无修改.

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JavaScript

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  • The Intl API has been enabled on Firefox for Android ({{bug(1344625)}}).
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APIs

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New APIs

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No changes.

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DOM

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  • On Mac, {{domxref("Document.hidden")}} is now true when the window is behind another non-translucent application {{bug(1236512)}}.
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  • The {{domxref("Gamepad.displayId")}} property has been implemented ({{bug(1375816)}}).
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  • The {{domxref("PerformanceTiming.secureConnectionStart")}} property has been implemented ({{bug(772589)}}).
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  • Firefox used to accept iso-2022-jp-2 sequences silently when an iso-2022-jp {{domxref("TextDecoder.TextDecoder","TextDecoder()")}} was instantiated, however this has now been removed to simplify the API, as no other browsers support it and no pages seem to use it. ({{bug(715833)}}).
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  • The 4ms clamping behaviour of {{domxref("WindowOrWorkerGlobalScope.setTimeout","setTimeout()")}} and {{domxref("WindowOrWorkerGlobalScope.setInterval","setInterval()")}} has been updated to be more in line with other browsers, as described in Timeouts throttled to >=4ms ({{bug(1378586)}}).
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  • The Page Visibility API's {{domxref("Document.onvisibilitychange")}} handler has been added ({{bug("1333912")}}).
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  • The {{domxref("Window.showModalDialog()")}} method has been removed ({{bug(981796)}}).
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DOM events

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  • {{domxref("GlobalEventHandlers.onwheel")}} is now available on {{domxref("HTMLElement")}} — it wasn't before ({{bug(1370550)}}).
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WebRTC

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  • Firefox now supports the {{domxref("RTCPeerConnection")}} properties which let you examine the current and pending configurations of the local and remote ends of the connection, to help manage changes in configuration: {{domxref("RTCPeerConnection.currentLocalDescription", "currentLocalDescription")}}, {{domxref("RTCPeerConnection.pendingLocalDescription", "pendingLocalDescription")}}, {{domxref("RTCPeerConnection.currentRemoteDescription", "currentRemoteDescription")}}, and {{domxref("RTCPeerConnection.pendingRemoteDescription", "pendingRemoteDescription")}}.
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Canvas and WebGL

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  • The {{domxref("CanvasRenderingContext2D.drawImage()")}} method has been updated so that smoothing occurs when downscaling even if imageSmoothingEnabled is false. This is not mandatory as per spec, but follows Chrome's behaviour. See {{bug(1360415)}}.
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  • An {{domxref("SVGImageElement")}} can now be used as a {{domxref("CanvasImageSource")}}, e.g. as the image source in a {{domxref("CanvasRenderingContext2D.drawImage","drawImage()")}} call ({{bug(1382027)}}).
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Security

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No changes.

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Plugins

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No changes.

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Other

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  • Gecko now encodes URLs internally as punycode, to avoid URL encoding problems (see {{bug("945240")}}, also see discussion in {{bug("942074")}}).
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  • Firefox on Windows and Mac OS X can now be made to run in headless mode using the -headless flag (see {{bug(1355150)}} and {{bug(1355147)}}).
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Removals from the web platform

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HTML

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  • The {{htmlelement("isindex")}} element has been removed from the HTML parser, and from form submission ({{bug(1266495)}}).
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  • The {{htmlelement("applet")}} element has been removed ({{bug(1279218)}}).
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APIs

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No changes.

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SVG

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No changes.

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Changes for add-on and Mozilla developers

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WebExtensions

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No changes.

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See also

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Older versions

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{{Firefox_for_developers(55)}}

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