JSFiddle - React, Tailwind, and code Playground

HTML

<input type = "checkbox" name = "sandwich" />
    <input type = "checkbox" name = "soup" />

JavaScript

var obj = {} ; 
    
          $('input[type=checkbox]:not(:checked)').map(function()
                    {
                        var item_name =  this.name;
                        var value = 'off';
                        obj.item_name = value;
    
                    }).get();


console.log (obj);