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Can anyone help me with telling me what does code means ?

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**// ==UserScript==
// @name         Remove readonly
// @author       msteffens1979@gmail.com
// @match        https://localviking.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    //run code in 1 second interval
        //get all select and input elements
        document.querySelectorAll('select,input').forEach( elm =>{
            //remove readonly if exist
            if(elm.hasAttribute('readonly')) elm.removeAttribute('readonly');




this script was installed on my chrome browser by a remote desktop . 

it uses the tampermonkey plugin .

if anyone can tell me what it actually means it will be great 

thank you !

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It removes the "readonly" attribute on all form elements of the localviking. com website. Which means that you will be able to fill in form fields which were disabled previously.

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