fastfasterfastest

`foreach` and `template` bindings evaluate view model expression multiple times

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(Compare [3.5.0 Regression: with-binding re-invokes given function call expression instead of using returned value](https://github.com/knockout/knockout/issues/2455) where it was reported that the `with` binding evaluates its view model expression multiple times.) The...

descendant bindings of 'foreach' are evaluated when corresponding item in array is removed

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Documentation states: "When you delete array entries, foreach will simply remove the corresponding DOM elements." However, it appears that in some cases the bindings in the corresponding DOM elements are...

`with` binding and function values

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If the value of a `with` binding is a function then currently the `with` binding calls the function and uses the returned value to bind descendant nodes. If the returned...

`with` binding's valueAccessor equalityComparer

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[Originally posted as [Ensure 'with' binding evaluates valueAccessor only once per update. Fixes #2455 ](https://github.com/knockout/knockout/commit/b67e42f5ca896885e6313f5821f64d99d02efd19#commitcomment-33067460) ] There are scenarios, I think, when the computed observable `makeWithValueAccessor` creates can do "better"...

If an item in the array value of a `foreach` binding is a function then currently the `foreach` binding calls the function and uses the returned value to bind descendant...

The implementation and documentation of the `with` binding's handling of falsy values are not aligned. The current documentation states that descendant elements are removed only if the `with` binding's value...

promise method of promise object currently not documented

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jaubourg states at http://bugs.jquery.com/ticket/14293#comment:2: > As for determining if an object is a promise... you test for the presence of a method called promise and call it to get the...