knockout/knockout v3.5.0-rc2

3.5.0 Release Candidate 2

on GitHub

This release includes a number of fixes for regressions in the previous 3.5.0 release candidate. Given the time since the RC, we also decided to include a few small improvements.

• Fix to maintain an element's focus when it's moved by the foreach binding.
• Fix changes to style binding to correctly append px.
• Fix regression to ko.contextFor when used after ko.applyBindingsToNode.
• Revert changes in ko.utils to use native array methods.
• Remove global createChildContextWithAs option and add noChildContext binding option. The default behavior for as matches previous releases.
• Fix the interaction of descendantsComplete and if/ifnot/with bindings.
• Add an option for if/ifnot/with bindings: completeOn: "render" will have the binding wait to trigger descendantsComplete until it is rendered.
• Throw an error for unbalanced virtual elements.
• ko.applyBindings throws an error if a non-Node is given as the second parameter.
• Support an options objects as a parameter to createChildContext.
• Support a custom rate-limit function as the method parameter to the rateLimit extender.
• Support setting custom CSS properties with the style binding.
• Optimize how many elements are moved by foreach.
• Update TypeScript declarations.

We decided to keep the more standard return value for ko.utils.arrayFirst, which now returns undefined instead of null when no item matches.