Function useEffect

useEffect(callback: EffectCallback, dependencies: string[]): void

A function that triggers a callback event if a state dependency changes.

Parameters

callback: EffectCallback
the callback event to trigger.
dependencies: string[]
the names of the state values to watch.

Returns void

Example

class GooglePOM {
     protected setSearchQuery;
     protected getSearchQuery;

     constructor(page: Page) {
         [this.getSearchQuery, this.setSearchQuery] = useState("searchQuery", "");
         useEffect(() => {
             console.log("The search query has changed!");
         }, ["searchQuery"]);
     }
}