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mini-code-editor #1 
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‎code-editor-react-web-app-project/README.md

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![under_construction](https://user-images.githubusercontent.com/37651620/93677983-a7942e00-facc-11ea-8b6d-b57e73dc73bf.png)
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## It's Live 🎉 Visit here ==> https://mini-code-editor.netlify.app/
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This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
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---
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![code_editor](https://user-images.githubusercontent.com/37651620/93988236-32647980-fda8-11ea-9052-3238ea4a42b2.png)
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<span>Code inside the above image is from <a href="https://codepen.io/nocni_sovac/pen/poyabaB">
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Codepen </a> by Zarko Rvovic (<a href="https://codepen.io/nocni_sovac">@nocni_sovac</a>)
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on <a href="https://codepen.io">CodePen</a>.</span>
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---
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## Available Scripts
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‎code-editor-react-web-app-project/package-lock.json

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‎code-editor-react-web-app-project/package.json

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{
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"name": "code-editor-react-web-app-project",
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"version": "0.1.0",
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"private": true,
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"dependencies": {
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"@testing-library/jest-dom": "^4.2.4",
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"@testing-library/react": "^9.3.2",
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"@testing-library/user-event": "^7.1.2",
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"codemirror": "^5.58.0",
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"react": "^16.13.1",
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"react-codemirror2": "^7.2.1",
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"react-dom": "^16.13.1",
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"react-scripts": "3.4.3"
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},
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"scripts": {
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"start": "react-scripts start",
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"build": "react-scripts build",
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"test": "react-scripts test",
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"eject": "react-scripts eject"
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},
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"eslintConfig": {
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"extends": "react-app"
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},
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"browserslist": {
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"production": [
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">0.2%",
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"not dead",
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"not op_mini all"
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],
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"development": [
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"last 1 chrome version",
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"last 1 firefox version",
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"last 1 safari version"
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]
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}
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}

‎code-editor-react-web-app-project/public/favicon.ico

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‎code-editor-react-web-app-project/public/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="theme-color" content="#000000" />
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<meta
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name="description"
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content="Web site created using create-react-app"
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/>
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<link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
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<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
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<title>Mini code Editor</title>
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</head>
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<body>
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<noscript>You need to enable JavaScript to run this app.</noscript>
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<div id="root"></div>
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</body>
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</html>

‎code-editor-react-web-app-project/public/manifest.json

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{
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"short_name": "React App",
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"name": "Create React App Sample",
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"icons": [
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{
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"src": "favicon.ico",
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"sizes": "64x64 32x32 24x24 16x16",
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"type": "image/x-icon"
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},
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{
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"src": "logo192.png",
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"type": "image/png",
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"sizes": "192x192"
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},
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{
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"src": "logo512.png",
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"type": "image/png",
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"sizes": "512x512"
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}
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],
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"start_url": ".",
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"display": "standalone",
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"theme_color": "#000000",
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"background_color": "#ffffff"
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}

‎code-editor-react-web-app-project/public/robots.txt

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# https://www.robotstxt.org/robotstxt.html
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User-agent: *
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Disallow:

‎code-editor-react-web-app-project/src/components/App.js

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import React, { useState, useEffect } from "react";
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import "../styles/App.css";
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import CodeEditor from "./CodeEditor";
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import useLocalStorage from "../hooks/useLocalStorage";
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function App() {
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const [html, setHtml] = useLocalStorage("html", "");
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const [css, setCss] = useLocalStorage("css", "");
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const [js, setJs] = useLocalStorage("js", "");
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const [srcDoc, setSrcDoc] = useState("");
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useEffect(() => {
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const timeout = setTimeout(() => {}, 20);
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setSrcDoc(`
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<html>${html}</html>
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<style>${css}</style>
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<script>${js}</script>
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`);
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return () => clearTimeout(timeout);
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}, [html, css, js]);
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return (
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<>
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<div className="pane top-pane">
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<CodeEditor
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language="xml"
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displayName="HTML"
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value={html}
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onChange={setHtml}
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/>
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<CodeEditor
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language="css"
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displayName="CSS"
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value={css}
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onChange={setCss}
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/>
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<CodeEditor
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language="javascript"
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displayName="JAVASCRIPT"
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value={js}
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onChange={setJs}
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/>
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</div>
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<div className="pane">
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<iframe
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srcDoc={srcDoc}
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title="output"
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sandbox="allow-scripts"
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frameBorder="0"
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width="100%"
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height="100%"
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/>
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</div>
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</>
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);
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}
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export default App;

‎code-editor-react-web-app-project/src/components/CodeEditor.js

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import React from "react";
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import "codemirror/lib/codemirror.css";
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import "codemirror/theme/material.css";
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import "codemirror/mode/xml/xml";
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import "codemirror/mode/javascript/javascript";
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import "codemirror/mode/css/css";
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import { Controlled as ControlledEditor } from "react-codemirror2";
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export default function Editor(props) {
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const { displayName, language, value, onChange } = props;
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function handleChange(editor, data, value) {
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onChange(value);
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}
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return (
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<div className="code-container">
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<div className="code-editor-title">{displayName}</div>
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<ControlledEditor
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onBeforeChange={handleChange}
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value={value}
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className="editor-mirror-code-wrapper"
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options={{
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lineWrapping: true,
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lint: true,
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mode: language,
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theme: "material",
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lineNumbers: true,
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}}
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/>
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</div>
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);
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}

‎code-editor-react-web-app-project/src/hooks/useLocalStorage.js

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import { useEffect, useState } from "react";
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const PREFIX = "mini-code-editor";
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export default function useLocalStorage(key, initialValue) {
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const prefixedkey = PREFIX + key;
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const [value, setValue] = useState(() => {
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const jsonValue = localStorage.getItem(prefixedkey);
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if (jsonValue != null) return JSON.parse(jsonValue);
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if (typeof initialValue === "function") {
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return initialValue();
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} else {
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return initialValue;
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}
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});
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useEffect(() => {
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localStorage.setItem(prefixedkey, JSON.stringify(value));
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}, [prefixedkey, value]);
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return [value, setValue];
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}

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