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useEffect for React Native

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Javasper answered on May 29, 2020 Popularity 9/10 Helpfulness 3/10

answer useEffect for React Native

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useEffect for React Native

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export default function App() {
  const [text, setText] = useState('dfdfdfdfdfd');
  useEffect(()=>{

alert("I pop up when component is rendered!");

  })
  /***/

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript react-native use-effect

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Contributed on Sep 13 2022

Javasper

0 Answers Avg Quality 2/10

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react useEffect

Comment

import React, { useEffect } from 'react';

export const App: React.FC = () => {
  
  useEffect(() => {
        
  }, [/*Here can enter some value to call again the content inside useEffect*/])
  
  return (
    <div>Use Effect!</div>
  );
}

Popularity 10/10 Helpfulness 4/10 Language typescript

Source: Grepper

Tags: typescript t

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Contributed on May 29 2020

DonsWayo

0 Answers Avg Quality 2/10

useeffect react example

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import React, { useEffect, useState } from "react";
import ReactDOM from "react-dom";

function Reddit() {
  // Initialize state to hold the posts
  const [posts, setPosts] = useState([]);

  // effect functions can't be async, so declare the
  // async function inside the effect, then call it
  useEffect(() => {
    async function fetchData() {
      // Call fetch as usual
      const res = await fetch(
        "https://www.reddit.com/r/reactjs.json"
      );

      // Pull out the data as usual
      const json = await res.json();

      // Save the posts into state
      // (look at the Network tab to see why the path is like this)
      setPosts(json.data.children.map(c => c.data));
    }

    fetchData();
  }); // <-- we didn't pass a value. what do you think will happen?

  // Render as usual
  return (
    <ul>
      {posts.map(post => (
        <li key={post.id}>{post.title}</li>
      ))}
    </ul>
  );
}

ReactDOM.render(
  <Reddit />,
  document.querySelector("#root")
);

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: daveceddia.com

Tags: javascript j

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Contributed on Jan 04 2022

Akmal

0 Answers Avg Quality 2/10

useeffect react

Comment

import React, { useState, useEffect } from 'react'

export default function App() {
  const [count, setCount] = useState(0)
  const color = count % 5 === 0 ? 'red' : 'blue'

  useEffect(() => {
    document.body.style.backgroundColor = color
  }, [color])

  return (
    <button
      onClick={() => {
        setCount(count + 1)
      }}
    >
      Click HERE to increment: {count}
    </button>
  )
}

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: www.react.express

Tags: hook

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Contributed on Nov 08 2022

Mehedi Islam Ripon

0 Answers Avg Quality 2/10

useeffect react

Comment

import React, { useState, useEffect } from 'react';
function Example() {
  const [count, setCount] = useState(0);

  // Similar to componentDidMount and componentDidUpdate:  
  useEffect(() => {    
  	// Update the document title using the browser API    
  	document.title = `You clicked ${count} times`;  
  });
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}
Source:reactjs.org
3
React useEffect, useState

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 30 2022

Tough Tuatara

0 Answers Avg Quality 2/10

useeffect react

Comment

import { useEffect } from 'react';
import { createConnection } from './chat.js';

function ChatRoom({ roomId }) {
  const [serverUrl, setServerUrl] = useState('https://localhost:1234');

  useEffect(() => {
    const connection = createConnection(serverUrl, roomId);
    connection.connect();
    return () => {
      connection.disconnect();
    };
  }, [serverUrl, roomId]);
  // ...
}

Popularity 7/10 Helpfulness 2/10 Language javascript

Source: react.dev

Tags: javascript use-effect u

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Contributed on Feb 01 2024

Imran Khan

0 Answers Avg Quality 2/10

react useEffect

Comment

useEffect(() => {
  const dialog = dialogRef.current;
  dialog.showModal();
  return () => dialog.close();
}, []);

Popularity 6/10 Helpfulness 2/10 Language javascript

Source: react.dev

Tags: javascript use-effect

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Contributed on Jan 29 2024

Shahed

0 Answers Avg Quality 2/10

when to use useEffect

Comment

What does useEffect do? By using this Hook, you tell React that 
your component needs to do something after render. 
React will remember the function you passed (we’ll refer to it 
as our “effect”), and call it later after performing the DOM updates.

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: Grepper

Tags: use-effect u

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Contributed on Aug 27 2022

ABDELLATIF ANAFLOUS

0 Answers Avg Quality 2/10

useeffect react

Comment

useEffect is a hook for encapsulating code that has 'side effects,' and is like a combination of componentDidMount , componentDidUpdate , and componentWillUnmount . Previously, functional components didn't have access to the component life cycle, but with useEffect you can tap into it.23.1.2019

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 30 2022

Tough Tuatara

0 Answers Avg Quality 2/10

useEffect react

Comment

function FriendStatusWithCounter(props) {
  const [count, setCount] = useState(0);
  useEffect(() => {    document.title = `You clicked ${count} times`;
  });

  const [isOnline, setIsOnline] = useState(null);
  useEffect(() => {    function handleStatusChange(status) {
      setIsOnline(status.isOnline);
    }

    ChatAPI.subscribeToFriendStatus(props.friend.id, handleStatusChange);
    return () => {
      ChatAPI.unsubscribeFromFriendStatus(props.friend.id, handleStatusChange);
    };
  });
  // ...
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: reactjs.org

Tags: javascript j

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Contributed on Jun 25 2021

Annoying Ant

0 Answers Avg Quality 2/10

useEffect for React Native

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