honeymoose
/
angular-cn
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

docs: remove references to CheckAlways and CheckOnce (#42300) 

Fixes #29751

PR Close #42300
This commit is contained in:
David Shevitz 2021-05-25 03:08:26 +00:00 committed by Zach Arend
parent d15a6a3a71
commit 1955dbb048
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
aio/content/guide/glossary.md
View File

@ -156,10 +156,10 @@ The change detector is responsible for updating the view to reflect the current
Similarly, the user can interact with the UI, causing events that change the state of the data model.
These events can trigger change detection.
Using the default ("CheckAlways") change-detection strategy, the change detector goes through the [view hierarchy](#view-tree) on each VM turn to check every [data-bound property](#data-binding) in the template. In the first phase, it compares the current state of the dependent data with the previous state, and collects changes.
Using the default change-detection strategy, the change detector goes through the [view hierarchy](#view-tree) on each VM turn to check every [data-bound property](#data-binding) in the template. In the first phase, it compares the current state of the dependent data with the previous state, and collects changes.
In the second phase, it updates the page DOM to reflect any new data values.
If you set the `OnPush` ("CheckOnce") change-detection strategy, the change detector runs only when [explicitly invoked] (api/core/ChangeDetectorRef), or when it is triggered by an `Input` reference change or event handler. This typically improves performance. For more information, see [Optimize Angular's change detection](https://web.dev/faster-angular-change-detection/).
If you set the `OnPush` change-detection strategy, the change detector runs only when [explicitly invoked] (api/core/ChangeDetectorRef), or when it is triggered by an `Input` reference change or event handler. This typically improves performance. For more information, see [Optimize Angular's change detection](https://web.dev/faster-angular-change-detection/).
{@a class-decorator}

2
aio/content/guide/pipes.md
View File

@ -400,7 +400,7 @@ The asynchronous method sends an HTTP request, and returns an observable that em
As shown in the previous section, you can use the impure `AsyncPipe` to accept an observable as input and subscribe to the input automatically.
You can also create an impure pipe to make and cache an HTTP request.
Impure pipes are called whenever change detection runs for a component, which could be every few milliseconds for `CheckAlways`.
Impure pipes are called whenever change detection runs for a component, which could be as often as every few milliseconds.
To avoid performance problems, call the server only when the requested URL changes, as shown in the following example, and use the pipe to cache the server response.
The tabs show the following: