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ASP.NET Core 3 and React
book

ASP.NET Core 3 and React

by Carl Rippon
December 2019
Intermediate to advanced
598 pages
12h 21m
English
Packt Publishing
Content preview from ASP.NET Core 3 and React

Using useEffect to execute logic

So, how do we execute logic when a function-based component is rendered? Well, we can use a useEffect hook in React, which is what we are going to do in the following steps:

  1. Let's add an import statement to import the useEffect function from React into HomePage.tsx:
import { useEffect } from 'react';
  1. We need to change HomePage so that it has an explicit return statement since we want to write some JavaScript logic in the component, as well as return JSX:
export const HomePage = () => {  return (    <Page>      ...    </Page>  );};
  1. Now, we can call the useEffect hook before we return the JSX:
export const HomePage = () => {  useEffect(() => { console.log('first rendered'); }, []);  return (    ...  );};
The useEffect
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Publisher Resources

ISBN: 9781789950229