Opera Software ASA

Web specifications support in Opera Presto 2.9

Last update

December 6, 2011

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Overview

Web specifications added since Opera Presto 2.8

• core-integration-points 163 through 167
• core-integration-points 168 through 174
• core-integration-points 175 through 181
• core-integration-points 182 through 186
• core-integration-points 187 through 192
• core-integration-points 193 through 201
• core-integration-points 202 through 202
• core-integration-points 203 through 205
• core-integration-points 206 through 211
• core-integration-points 212 through 224

Opera Presto web specification support pages

Overview

Opera Presto rendering engine

This document and its associated support tables apply specifically to the Opera Presto 2.9 rendering engine. It incorporates Opera Presto web specification support with the latest Core Milestone and integration point. Changes and additions occurring since Opera Presto 2.8 are identified with their specific Core Milestone integration points. Please see the following Core Milestone integration points added since Opera Presto 2.8 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/2.9.163 Version/11.xx

This example user agent string describes the Opera Presto 2.9 (Presto/2.9) rendering engine, incorporating core-integration-point 163 (.163).

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 2.8

Important note

The following web specification items integrated into the Opera Presto rendering engine are identified with their (Presto/2.9.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 163 through 167

HTML5

• Support is added for the input element indeterminate attribute for checkboxes. This is used to change the appearance of checkbox controls. (Presto/2.9.165)
  • See: HTML5 Section 4.10.7: The input element.

Implemented in core-integration-points 168 through 174

CSS3

• Removed support for CSS3 generated content on replaced elements. (Presto/2.9.172)
• This aligns Opera's behavior with the current specification and the competition.
• See: CSS3 Image Values/Replaced Content support in Opera Presto 2.9
• See: W3C CSS3 Generated and Replaced Content Module Section 12: Replaced content

Implemented in core-integration-points 175 through 181

HTML5

• The following attributes of the <video> element have been implemented: (Presto/2.9.177)
  • See: The preload attribute
  • See: The buffered attribute
  • See: The seekable attribute

Internationalized Domain Names for Applications (IDNA) protocol of the Internet Engineering Task Force (IETF)

• The new IDNA specification has been implemented. (Presto/2.9.176)
  • See: RFC 5890
  • See: RFC 5891
  • See: RFC 5892
  • See: RFC 5893
  • See: RFC 5894

Implemented in core-integration-points 182 through 186

HTML5

• Implemented the DOM API for HTML5 Microdata. (Presto/2.9.185)
  • See: HTML Microdata

Implemented in core-integration-points 187 through 192

HTML5

• Implemented support for registerProtocolHandler() and registerContentHandler() methods. (Presto/2.9.187)
  • See: Custom scheme and content handlers

SVG

• Initialize DOM objects properly for SVG attributes that have lacuna values, as defined in SVG 1.1 Second Edition. (Presto/2.9.189)
  • See: SVG DOM object initialization

Implemented in core-integration-points 193 through 201

ECMAScript

• Implemented full support for ECMAScript 5.1. (Presto/2.9.199)
  • See: ECMAScript Language Specification

Implemented in core-integration-points 202 through 202

XMLHttpRequest Level 2

• Implemented support for "Khronos Typed Arrays" and XMLHttpRequest Level 2 support for receiving ArrayBuffers. (Presto/2.9.202)
  • See: Typed Array Specification

Implemented in core-integration-points 203 through 205

Unicode

• Updated to Unicode 6.0.0 specification. (Presto/2.9.203)
  • See: Unicode 6.0.0

HTML5

• Implemented support for the muted attribute on media elements. (Presto/2.9.205)
  • See: The muted attribute of the audio and video elements.

Implemented in core-integration-points 206 through 211

CSS3, SVG

• Implemented support for font-relative length rem in CSS and SVG. (Presto/2.9.208)
  • See: CSS Values and Units Module Level 3
  • See: Interface SVGLength

WebGL

• Added support for the WebGL canvas context. (Presto/2.9.210)
  • See: the WebGL Specification
  • Removed support for the old 3D and 2D-game canvas contexts
  • Changed canvas image drawing to be in line with the specification

Implemented in core-integration-points 212 through 224

HTML5

• Removed support for <basefont>. (Presto/2.9.217)
  • See: Obsolete features

CSS3

• Implemented full support for radial-gradient and repeating-radial-gradient. (Presto/2.9.219)
  • See: CSS Image Values and Replaced Content Module Level 3

HTML5

• Implemented full support for the part of the HTML5 specification entitled "Parsing HTML documents". (Presto/2.9.220)
  • See: Parsing HTML documents

Opera web specification support pages

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