Is it possible to change an attribute value from another html file?

Question

So I have a website right now and I want to change the aria-expanded value of an exapandable paragraph in another page when I press an anchor element in the main page. What will I need to change in my main.html so i can somehow change the aria-expanded value on the help.html file?

main.html

<a href="help">
   <h2>Returns Policy</h2>
</a>

help.html

<div class="accordion-item">
       <button id="accordion-button-3" aria-expanded="false"><span
        class="accordion-title">Returns Policy</span><span
        class="icon" aria-hidden="true"></span></button>
        <div class="accordion-content">
            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod 
            tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et 
            leo duis ut. Ut tortor pretium viverra suspendisse potenti.
            </p>
        </div>
</div>

//and this is the script used to expand the paragraph

const items = document.querySelectorAll(".accordion button");

    function toggleAccordion() {
        const itemToggle = this.getAttribute('aria-expanded');

        for (i = 0; i < items.length; i++) {
            items[i].setAttribute('aria-expanded', 'false');
        }

        if (itemToggle == 'false') {
            this.setAttribute('aria-expanded', 'true');
        }
    }

    items.forEach(item => item.addEventListener('click', toggleAccordion));

Answer 1

your button id is "accordion-button-3" so in querySeletorAll you need "#accordion-button-3"

const items = document.querySelectorAll("#accordion-button-3");