JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">

<div>
 <span>
   <input type="text" id="item1" value="AA"/>
 </span>
</div>

<div>
 <span>
   <input type="text" id="item2" value="BB"/>
 </span>
</div>

<div>
 <span>
   <input type="text" id="item3" value="CC"/>
 </span>
</div>

</div>

JavaScript

var ids = $("input[id^='item']").map(function(i,e){
    return e.id;
});

var ids = $("input[id^='item']").map(function(i,e){
    return $(e).val();
});

console.log(ids);