JSFiddle - React, Tailwind, and code Playground

HTML

<ul data-bind='foreach: list'>
    <li>
        <input data-bind='value: $parent.list[$index()]' />
    </li>
</ul>

<ul data-bind='foreach: list'>
    <li>
        <input data-bind='text: $data'></input>
    </li>
</ul>

JavaScript

vm = {
    list: [
        ko.observable('123'),
        ko.observable('456'),
        ko.observable('456'),
        ko.observable('456'),
        ko.observable('456'),
        ko.observable('456')
        ]
};

ko.applyBindings(vm);