I just want to append text to an object

Question

Now for every item that has the string "shirt", I want to replace shirt to "Shirts are not available

const inventory = [
        { line_item_id: "55412", item: "Shirt small", description: "" },
        { line_item_id: "55342", item: "shirt big full", description: "" },
        { line_item_id: "1124",  item: "Pant Small",description: "",},
    ];

I want it to look like this

const inventory = [
    { line_item_id: "55412", item: "Shirts are not available small", description: "" },
    { line_item_id: "55342", item: "Shirts are not available big full", description: "" },
    { line_item_id: "1124",  item: "Pant Small",description: "",},
];

I have used the map function, but it does not including rows that weren’t modified

My code

  const test = convertedToJson.map((convertedToJson) => {
        if (!!convertedToJson.item.match(/Shirt/i)) {
            return convertedToJson.item + "Shirts are not available  ";
        }
    });
    console.log(test);

"My output"

const inventory = [
       'Shirts are not available small'
        'Shirts are not available big full'
    ];

Answer 1

const convertedInventory = inventory.map((it) => {
  const reg = new RegExp(/Shirt/i);
  if (it.item.match(reg)) {
    return {
      ...it,
      item: it.item.replace(reg, 'Shirts are not available')
    }
  }
  return it;
})