JSFiddle - React, Tailwind, and code Playground

HTML

<select id="myselect">
    <option value="5">bbb</option>
    <option value="13">aaa</option>
    <option value="1">ccc</option>
</select>

JavaScript

function sortOptions() {
    var options = document.getElementById('myselect').options;
    var optionsArray = [];
    for (var i = 0; i < options.length; i++) {
        optionsArray.push(options[i]);
    }
    optionsArray = optionsArray.sort(function (a, b) {
        console.log(a.innerHTML + ', ' + b.innerHTML);
        return a.innerHTML.charCodeAt(0) - b.innerHTML.charCodeAt(0);

    });
    for (var i = 0; i <= options.length; i++) {
        console.log(optionsArray[i]);
        options[i] = optionsArray[i];
    }
    options[0].selected = true;
}

sortOptions();