This commit represents rewrite of the NgClass directive to address
severe performance problem (excessive DOM mutation). The modified
algorithm removes all the known performance clifs and has number of
desirable properties:
- it is shorter and (arguably) easier to follow;
- drops usage of existing differs thus limiting dependencies on other
part of the code without increasing size of the directive;
- doesn't degrade any other performance metrics.
Fixes#25518
PR Close#48433
With strict template type checking, a null/undefined value will raise an
error. However the implementation is completely fine with it, and it
would be pointless to "fix" it at the callsite and convert to e.g. an
empty string. Allow all of the "supported types" to be passed in
directly to ngClass.
Fixes#39280
PR Close#46906
This commit updates the directives presents in the `CommonModule` and annotates them with the `standalone: true` flag. With that flag, the directives can now be imported individually, as well as imported via the `CommonModule`.
PR Close#46469
NOTE: This change must be reverted with previous deletes so that it code remains in build-able state.
This change deletes old styling code and replaces it with a simplified styling algorithm.
The mental model for the new algorithm is:
- Create a linked list of styling bindings in the order of priority. All styling bindings ere executed in compiled order and than a linked list of bindings is created in priority order.
- Flush the style bindings at the end of `advance()` instruction. This implies that there are two flush events. One at the end of template `advance` instruction in the template. Second one at the end of `hostBindings` `advance` instruction when processing host bindings (if any).
- Each binding instructions effectively updates the string to represent the string at that location. Because most of the bindings are additive, this is a cheap strategy in most cases. In rare cases the strategy requires removing tokens from the styling up to this point. (We expect that to be rare case)S Because, the bindings are presorted in the order of priority, it is safe to resume the processing of the concatenated string from the last change binding.
PR Close#34616
Since I was learning the codebase and had a hard time understanding what was going on I've done a
bunch of changes in one commit that under normal circumstances should have been split into several
commits. Because this code is likely going to be overwritten with Misko's changes I'm not going to
spend the time with trying to split this up.
Overall I've done the following:
- I processed review feedback from #34307
- I did a bunch of renaming to make the code easier to understand
- I refactored some internal functions that were either inefficient or hard to read
- I also updated lots of type signatures to correct them and to remove many casts in the code
PR Close#34307
Prior to this change, in Ivy mode ngStyle/ngClass would accidentally emit value changes for static
(string-based) values even if the value itself had not changed. This patch ensures that
the style/class diffing code is more strict and when it signals ngClass/ngStyle that there has been
a value change.
Fixes#34336, #34444
PR Close#34307
All errors for existing fields have been detected and suppressed with a
`!` assertion.
Issue/24571 is tracking proper clean up of those instances.
One-line change required in ivy/compilation.ts, because it appears that
the new syntax causes tsickle emitted node to no longer track their
original sourceFiles.
PR Close#24572
Pawel Kozlowski