Asda: Adds button that hides out of stock groceries

asda-out-of-stock.js

// ==UserScript==
// @name         Asda removes out of stock groceries
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Makes online shopping easier
// @author       You
// @match        https://groceries.asda.com/search/*
// @grant        none
// ==/UserScript==

(function() {

    function hideOutOfStock() {
        jQuery('.co-item').each((i, v) => {
            if ($('.unavailable-banner__product-status', v).length) {
                $(v).hide();
            }
        });
    }

    const $newHideBtn = $('<button>Hide out of stock items</button>');

    $newHideBtn
      .on('click', hideOutOfStock)
      .css({
          'position': 'sticky',
          'top': '20px',
          'left': '20px',
          'z-index': '10000'
      });

    $('body').prepend($newHideBtn);

})();