The Angular 18 series (twenty-six) implements lazy search capabilities based on RXJS

Little scum · Posted on 10/28/2024 5:18:59 PM

Requirements: When the text changes, the back-end interface should be called to query the keywords and return data, but often the user has not fully entered the keywords, and the text change event will be triggered many times, which will cause pressure on the back-end interface to frequently request, and there is also a certain pressure on the front-end frequent rendering. How to implement the delayed search function? That is, when the user enters the keyword completely, the backend interface query is called.

To facilitate the presentation, here is the settingDelay by one second, the renderings are as follows:

HTML page code:

Login is visible.

The TS component code is as follows:

Login is visible.

(End)

Little scum · Posted on 5/15/2025 8:44:41 AM

debounceTime() pipeline
The debounceTime pipeline is a built-in pipeline in Angular that can be used to debounce events. To use the debounceTime pipeline, you need to pass the debounce time (in milliseconds) as a parameter
distinctUntilChanged()
distinctUntilChanged is an operator that filters out the same values that are fired consecutively in an Observable. This is useful in situations where you want to prevent the Observable from firing the same value multiple times in a row.

Little scum · Posted on 5/15/2025 9:29:33 AM

AsyncValidatorFn validates latency stabilization

Login is visible.

Reference:The hyperlink login is visible.

Little scum · Posted on 5/15/2025 9:33:52 AM

Little slag Posted on 2025-5-15 09:29
AsyncValidatorFn validates latency stabilization

Reference: https://stackoverflow.com/questions/36919011/how-to-add-debounc ...

[Angular] The Angular 18 series (twenty-six) implements lazy search capabilities based on RXJS

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