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Web specifications support in Opera Presto 2.10

Last update

April 23, 2012

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Overview

Web specifications added since Opera Presto 2.9

• core-integration-points 225 through 231
• core-integration-points 232 through 236
• core-integration-points 237 through 244
• core-integration-points 245 through 250
• core-integration-points 251 through 261
• core-integration-points 262 through 266
• core-integration-points 267 through 271
• core-integration-points 272 through 278
• core-integration-points 279 through 294

Opera Presto web specification support pages

Overview

Opera Presto rendering engine

This document and its associated support tables apply specifically to the Opera Presto 2.10 rendering engine. It incorporates Opera Presto web specification support with the latest Core Milestone and integration point. Changes and additions occurring since Opera Presto 2.9 are identified with their specific Core Milestone integration points. Please see the following Core Milestone integration points added since Opera Presto 2.9 topic.

Opera desktop, device, and mobile products

Opera products use and depend upon various parts of the Opera Presto rendering engine and its web specification features. It is important to note that while the latest Opera Presto rendering engine has incorporated new web specification features, they may not have been added to the latest released versions of Opera products.

The Opera user agent string

Opera products will identify which Opera Presto version and core-integration-point they are using in their user agent string. Depending on your Opera product, the Opera user agent string is placed in the "About Opera" page, found by typing opera:about in the address bar, or by clicking "Help > About Opera" in the Menu.

Example:

Opera/9.80 (Windows NT 5.1; U; Edition Next; en) Presto/2.10.238 Version/12.xx

This example user agent string describes the Opera Presto 2.10 (Presto/2.10) rendering engine, incorporating core-integration-point 238 (.238).

A high-level overview of current web specifications support in Opera products is available on opera.com at: Web specifications support in Opera products: an overview.

Opera articles

For further reference, and where applicable, Opera web specification support table documents now contain hyperlinks to Opera technical articles written by leading subject matter experts. These are sourced from Opera's extensive developer website, dev.opera.com.

Web specifications added since Opera Presto 2.9

Important note

The following web specification items integrated into the Opera Presto rendering engine are identified with their (Presto/2.10.xxx) core-integration-point numbers. This identifies which web specifications are included with Opera product versions, as shown in their user agent strings. Please see the preceding description in The Opera user agent string topic, to associate Opera product versions with the Opera Presto core-integration-points they contain.

Implemented in core-integration-points 225 through 231

CSS4

• Added support for applying the image-rendering property to HTML content, including <img>, <canvas>, <video poster>, background-image, and (-o-)border-image. (Presto/2.10.225)
• The supported values of the image-rendering property are:
  • auto
  • optimizeSpeed
  • optimizeQuality
  • -o-crisp-edges
• See: CSS Image Values and Replaced Content Module Level 4.

Geolocation

• Implemented Google's new geolocation JSON API. (Presto/2.10.227)

Implemented in core-integration-points 232 through 236

XMLHttpRequest Level 2

• Enabled Cross-Origin Resource Sharing (CORS) for XMLHttpRequest. (Presto/2.10.232)
  • XMLHttpRequest may now perform cross-origin requests
  • Credentialed requests allowed using .withCredentials
  • XMLHttpRequest implements EventTarget
  • XMLHttpRequest implements onerror events
  • Anonymous requests, AnonXMLHttpRequest
• See: Cross-Origin Resource Sharing
• See: XMLHttpRequest

HTML5

• Added support for the dirname attribute of the input element. (Presto/2.10.233)
• See: Common input element attributes

Implemented in core-integration-points 237 through 244

XMLHttpRequest, postMessage

• Added support for passing various forms of structured data: (Presto/2.10.238)
  • Sending File objects in {window|worker}.postMessage
  • Sending Blob objects in XMLHttpRequests
  • Sending FormData objects in XMLHttpRequests
• See: Posting messages
• See: Safe passing of structured data
• See: The send() method

SSL

• Implemented new features: (Presto/2.10.239)
  • See HTTP Strict Transport Security (HSTS)
  • See Transport Layer Security (TLS) False Start

Implemented in core-integration-points 245 through 250

XMLHttpRequest

• Completed support for progress events in XMLHttpRequest, for upload, download, and timeout updates: (Presto/2.10.246)
  • The upload attribute
  • The loadstart event (and other progress events)
  • The timeout attribute

WebIDL

• Bugfix: Added support for Event constants on the prototype object. (Presto/2.10.247)
• See: Web IDL

Implemented in core-integration-points 251 through 261

WebRTC 1.0

• getUserMedia introduced in Labs release (Presto/2.10.254)
  • See: Labs - Camera build
  • See: Core-integration-point 260 for more information on implementation

Privacy

• Added support for the Do-Not-Track HTTP header (DNT). (Presto/2.10.255)
• See: Tracking Preference Expression (DNT)

XMLHttpRequest

• Added support for XMLHttpRequest responseType="json". (Presto/2.10.256)
• See: The responseType attribute

DeviceOrientation

• Implemented full support for DeviceOrientation. (Presto/2.10.258)
• See: DeviceOrientation Event Specification

WebRTC 1.0

• Implemented the getUserMedia options object argument. (Presto/2.10.258)
  • getUserMedia prompts the user for permission to use their webcam or other video or audio input
  • The options argument is an object of type MediaStreamOptions with boolean properties audio and video
  • See: WebRTC 1.0: Real-time Communication Between Browsers
• Added support for the ended event on LocalMediaStream. (Presto/2.10.260)
  • See: WebRTC 1.0: Real-time Communication Between Browsers
• Added support for getUserMedia API. (Presto/2.10.260)
  • Support for single camera video
  • Implementation of LocalMediaStream components:
    • The stop() method
    • The ended event
  • Support for direct assignment of LocalMediaStream objects to the HTMLVideoElement's src property
  • See: WebRTC 1.0: Real-time Communication Between Browsers

Implemented in core-integration-points 262 through 266

Media Queries

• Improved error handling for CSS Media Queries and added support for DPCM unit for resolution. (Presto/2.10.264)
  • See: Media Queries

Implemented in core-integration-points 267 through 271

WebIDL

• Fixed behavior to satisfy WebIDL specification. (Presto/2.10.269)
  • Previously, a DOMException.NO_MODIFICATION_ALLOWED_ERR was raised on attempted updates of read-only host properties. Now:
    • In EcmaScript non-strict mode, the update will be silently ignored.
    • In strict mode, a TypeError will be thrown.
  • See: Web IDL

HTML5 - Drag and Drop

• Implemented HTML5 drag and drop. (Presto/2.10.270)
  • Added support for the following attributes, on HTML and SVG elements:
    • ondragstart
    • ondrag
    • ondragover
    • ondragenter
    • ondragleave
    • ondrop
    • ondragend
    • dropzone
    • draggable
  • Added support for the following DOM interfaces:
    • DragEvent
    • DataTransfer
    • DataTransferItem
    • DataTransferItemsList
  • See: HTML - Drag and Drop

HTML5 - Embedded Content

• Improved streaming for <video> (Presto/2.10.271)
  • <video> will now use a new kind of cache for streaming resources and limit the bandwidth to (approximately) the bandwidth of the video while playing. This is reflected in the buffered attribute.
  • Content-Type will now be ignored for <video>, instead sniffing as per MIME sniffing
  • Cache invalidation for <video> was improved, so live streams should be able to recover from a network error. Previously no new data could be read after a network error.

Implemented in core-integration-points 272 through 278

W3C Text Encoding

• Byte order mark (BOM) now overrides encoding specified in HTTP header. (Presto/2.10.273)
  • See: The byte-order mark (BOM) in HTML

CSS3 - Animations and Transitions

• Added support for CSS3 Animations and updated support for CSS Transitions. (Presto/2.10.274)
  • All of the animations listed here are supported with the -o- prefix: CSS Animations
  • See: Opera CSS3 Transitions

FreeType

• Enabled bytecode hinting for any products using FreeType, this is effective for both webfonts and platform fonts. (Presto/2.10.276)

DOM Events

• Modified document and script implementations. (Presto/2.10.277)
  • Aligns support for document/script readystatechange events with HTML5.
    • See: Semantics, structure, and APIs of HTML documents
  • Hides window.event, attachEvent, and detachEvent from visibility.
    • See: W3C DOM Events

Implemented in core-integration-points 279 through 294

Paged Overflow

• Paged Overflow functionality implemented. (Presto/2.10.286)
  • See: Paged Overflow

WebGL

• Improved conformance to WebGL specification conformance tests. (Presto/2.10.289)
  • See: WebGL Specification

Clipboard API

• Added the following support for Clipboard API (Presto/2.10.292)
  • Implemented copy, cut, and paste events for text/plain and text/html content.
  • Implemented support for copy, cut, and paste arguments to document.execCommand(), if allowed by site-specific preference.
  • See: Clipboard API and events

Opera web specification support pages

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