JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <select id="itemslist1" onchange="changeInfo(this)">
            <option value="0">Select</option>
            <option value="1">item1</option>
            <option value="2">item2</option>
    </select>
    
    <select id="itemslist2" onchange="changeInfo(this)">
            <option value="0">Select</option>
            <option value="1">item1</option>
            <option value="2">item2</option>
    </select>
    <br/>
    Info 1:
    <div id="info1"></div>
    Info 2:
    <div id="info2"></div>
</body>

JavaScript

function changeInfo(el) {
    var info, node;
    if (el.id == "itemslist1") {
        info = [ 
            "some text",       // option 0
            "something else",  // option 1
            "..."              // option 2
        ];
        node = document.getElementById('info1');
    }
    else if (el.id == "itemslist2") {
        info = [ 
            "second info div",           // option 0
            "hello world",               // option 1
            "Star Trek trumps Star Wars" // option 2
        ]; 
        node = document.getElementById('info2');        
    }
    else return;

    var val = el.options[el.selectedIndex].value;
    node.innerHTML = info[val];
}