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Reactjs – How to prevent a React useEffect from running twice in StrictMode development with an external system that has no cleanup method?

Consider the following example: pages/index.js import { useState, useRef, useEffect } from 'react' function complexExternalLibraryFunctionWithoutCleanup(elem, cb) { elem.addEventListener('click', () => { cb() }) } export default function IndexPage() { const [text, setText] = useState('') const [myint, setMyint] = useState(0) const…

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Reactjs – Form onSubmit isn't triggered

"use client"; import React, { useState } from "react"; import { useRouter } from "next/navigation"; import { zodResolver } from "@hookform/resolvers/zod"; import { useForm } from "react-hook-form"; import { z } from "zod"; import { api } from "@/trpc/react"; import…

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