What’s new in Chromium 58 and Opera 45
IndexedDB 2.0 is now supported in Opera, making it simpler to work with large data sets in the browser. IDB 2.0 features new schema management, bulk action methods, and more standardized handling of failures.
The structure of a site’s database has large performance impacts and can be difficult to change. To simplify updates, object stores and indexes can now be renamed in-place after a refactoring. Sites can also use more natural keys without worrying about a performance penalty thanks to binary keys, which allow compact representations for custom keys.
For more information about what IndexedDB 2.0 brings, check out Bevis Tseng’s summary.
An improvement to iframe navigation
Third-party content, such as advertising, that automatically redirects the page can annoy users and create security issues. Because of this, developers are able to put third-party content inside sandboxed
iframes to prevent this behavior. However, in some cases this type of content needs to navigate the top-level page when clicked, like a standard advertisement.
To address this, Opera 45 now supports the new
iframe sandbox keyword allow-top-navigation-by-user-activation. This keyword gives sandboxed
iframes the ability to navigate the top-level page when triggered by user interaction, while still blocking auto-redirects.
Selection API changes
removeRange(), a new function, developers can now programmatically remove a specified text Range.
- When accessing properties like
selectionEnd, Opera will now return
nullwhen it would have thrown an
- Rather than silently clamping offset values that were too large,
setBaseAndExtent()now throws an
IndexSizeError DOMExceptionto better align with spec.
- Rather than silently failing for
InvalidNodeTypeError DOMExceptionto better align with spec.
- To improve interoperability,
Selection.addRange()now ignores an additional range if it overlaps with an existing range, rather than merging the two ranges.
- To better align with spec,
getRangeAt()now always returns a new
Rangewith position normalization.
Other features in this release
- Opera adds in-form warnings for sensitive fields when the top-level page is not HTTPS. Whenever you start filling in your password or credit card number on a page, which is not HTTPS, the warning will appear.
SharedWorkerscan now be created using
data:URLs. Note that such workers will have an opaque origin.
PointerEvents.getCoalescedEvents()allows developers to access all input events since the last time a
PointerEventwas delivered, making it easier for drawing apps to create smoother curves using a precise history of points.
- Developers can now customize Opera’s native media controls such as the
remoteplaybackbuttons using the new ControlsList API.
- Sites can now access the approximate range of colors supported by Opera and output devices using the
display: flow-rootis now supported. An effect of flow-root is that it envelops floats, and can be used as a replacement for the clearfix hack.
SVGMatrixhave been transferred to new interfaces outside of Geometry.
PointerEvent.tangentialPressureand PointerEvent.twist attributes are now supported on Opera for Mac to provide more information to stylus devices and painting apps.
- The WebAudio API’s new playback
AudioContextLatencyCategoryenables the developer to easily make conscious tradeoffs between latency, power, and CPU efficiency.
Deprecated and removed features
Apple-tab-spanhave been deprecated as they are non-standard CSS classes.
usemapattributes now use case-sensitive matching rather than compatibility caseless to better align with spec.
- Sites must now use HTTPS when requesting notification permissions or creating non-persistent local notifications with the Notifications API, in accordance with Chromium’s policy around powerful features.
- Encrypted Media Extensions transmitted over non-secure origins has been deprecated per Chromium’s policy around powerful features and in compliance with the spec.
- To better align with spec,
cancelBubbleis now considered an alias to
stopPropagation()when set to true, and does not do anything when set to false.
removeRegion(), have been removed from the WebVTT spec and are therefore being removed from Opera.
- Top-level navigations to
data:URLs have been deprecated to further protect users from spoofing and phishing attempts.
- An instance of
HTMLObjectElementcan no longer be called as a function, since the legacy caller has been removed.
- Pre-standard ChaCha20-Poly1305 ciphers have been removed following the standardization of these algorithms at the IETF as RFC 7539 and RFC 7905, and the subsequent shipping of the standard versions in Opera 28.
- The AudioBuffer constructor now accepts the
sampleRatemember of an
AudioBufferOptionsdictionary instead of a
contextargument, simplifying the interface and emphasizing that
AudioBufferscan be shared between
- The synchronous
FileReaderSyncAPI has been deprecated in service workers, as the service worker spec requires all types of synchronous requests to be initiated outside of a service worker.
- The abbr and acronym elements now have a dotted underline by default to align with the HTML standard.
motion-rotationCSS properties have been removed in favor of the new versions:
AudioSourceNodeinterface has been removed as it was not part of the WebAudio spec.
webkitdropzoneattribute has been removed as it was not widely adopted.
If you’re interested in experimenting with features that are in the pipeline for future versions of Opera, we recommend following our Opera Developer stream.