thivi

export default function App() {
  const [press, setPress] = useState(false);
  const [pressed, setPressed] = useState(false);

  useEffect(() => {
    setPressed(true);
  }, [press]);
  
  return (
    <div className="App">

thivi

import React, { useState, useEffect } from "react";
import "./styles.css";

export default function App() {
  const [press, setPress] = useState(false);
  const [pressed, setPressed] = useState(false);

  let initialRender=true;
  useEffect(() => {
    if(initialRender){

thivi

import React, { useState, useRef, useEffect } from "react";
import "./styles.css";

export default function App() {
  const [press, setPress] = useState(false);
  const [pressed, setPressed] = useState(false);

  const initialRender = useRef(true);

  useEffect(() => {

thivi

import { useEffect, EffectCallback, DependencyList, useRef } from "react";

/**
 * This hook gets called only when the dependencies change but not during initial render.
 *
 * @param {EffectCallback} effect The `useEffect` callback function.
 * @param {DependencyList} deps An array of dependencies.
 *
 * @example
 * ```

thivi

<script type=”text/javascript”>  
	var authorizationCode = "<%=request.getParameter(\"code\")%>"  
</script> 

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<jsp:scriptlet>

	session.setAttribute("authCode",request.getParameter("code")); 
	session.setAttribute("sessionState", request.getParameter("session_state")); 

</jsp:scriptlet>

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<% 

String authCode = (String) session.getAttribute("authCode"); 
String sessionState = (String) session.getAttribute("sessionState"); 


if(authCode == null) { 
	authCode = ""; 
} 

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const sample = (function(){ 
	let _privateVariable= “This is private”; 
	
	return { 
		SetPrivateVariable:(value)=>{
			_privateVariable=value; 
		} 
	} 
})(); 

thivi

const pureSetRequestHeader = XMLHttpRequest.prototype.setRequestHeader; 

XMLHttpRequest.prototype.setRequestHeader = function(key, value) { 
	console.log(value); 
	pureSetRequestHeader.call(this, key, value); 
};

thivi

export default function App() {

  const [ counter, setCounter ] = useState(0);

  useEffect(()=>{
    setInterval(()=>{
      setCounter(counter + 1);
    }, 1000);
  }, []);