Stop all active Ajax requests in jQuery + Prevent Wordpress request abuse

index.js

$.xhrPool = {
        pool: [],
        abortAll: function() {
            $.each(this.pool, function(idx, jqXHR) {
                jqXHR.abort();
            });
            this.pool = [];
        },
        add: function(jqXHR) {
            this.pool.push(jqXHR);
        },
        remove: function(jqXHR) {
            let index = this.pool.indexOf(jqXHR);
            if (index > -1) {
                this.pool.splice(index, 1);
            }
        }
    };

    $.ajaxSetup({
        beforeSend: function(jqXHR) {
            $.xhrPool.add(jqXHR);
        },
        complete: function(jqXHR) {
            $.xhrPool.remove(jqXHR);
        }
    });

// Usage

searchInput.on('input', function() {
        clearTimeout(debounceTimeout);

        debounceTimeout = setTimeout(function() {
            const query = searchInput.val().trim();
                
            $.xhrPool.abortAll();

            if (query.length > 2) {
                search(query)
            } else {
                searchResults.empty();
            }
        }, 300);
});

function search(query) {
        
        $.ajax({
            url: header_ajax_search_params.ajaxurl,
            type: 'POST',
            data: {
                action: 'ajax_search',
                _wpnonce: header_ajax_search_params._wpnonce,
                keyword: query
            },
            success: function(data) {
                if (data.length > 0) {
                    const resultsHtml = data.map(function(item) {
                        return `
                                <div class="search-result-item">
                                    <img src="${item.thumbnail}" alt="${item.title}">
                                    <span>${item.title}</span>
                                </div>`;
                    }).join('');

                    searchResults.html(resultsHtml);
                } else {
                    searchResults.hide();
                }
            }
        });
}