jQuery扩展函数自动补全 autocomplete

\view\javascript\common.js

// Autocomplete */
(function($) {
	$.fn.autocomplete = function(option) {
		return this.each(function() {
			this.timer = null;
			this.items = new Array();

			$.extend(this, option);

			$(this).attr('autocomplete', 'off');

			// Focus
			$(this).on('focus', function() {
				this.request();
			});

			// Blur
			$(this).on('blur', function() {
				setTimeout(function(object) {
					object.hide();
				}, 200, this);
			});

			// Keydown
			$(this).on('keydown', function(event) {
				switch(event.keyCode) {
					case 27: // escape
						this.hide();
						break;
					default:
						this.request();
						break;
				}
			});

			// Click
			this.click = function(event) {
				event.preventDefault();

				value = $(event.target).parent().attr('data-value');

				if (value && this.items[value]) {
					this.select(this.items[value]);
				}
			}

			// Show
			this.show = function() {
				var pos = $(this).position();

				$(this).siblings('ul.dropdown-menu').css({
					top: pos.top + $(this).outerHeight(),
					left: pos.left
				});

				$(this).siblings('ul.dropdown-menu').show();
			}

			// Hide
			this.hide = function() {
				$(this).siblings('ul.dropdown-menu').hide();
			}

			// Request
			this.request = function() {
				clearTimeout(this.timer);

				this.timer = setTimeout(function(object) {
					object.source($(object).val(), $.proxy(object.response, object));
				}, 200, this);
			}

			// Response
			this.response = function(json) {
				html = '';

				if (json.length) {
					for (i = 0; i < json.length; i++) {
						this.items[json[i]['value']] = json[i];
					}

					for (i = 0; i < json.length; i++) {
						if (!json[i]['category']) {
							html += '
+ json[i]['value'] + '">' + json[i]['label'] + '
';
						}
					}

					// Get all the ones with a categories
					var category = new Array();

					for (i = 0; i < json.length; i++) {
						if (json[i]['category']) {
							if (!category[json[i]['category']]) {
								category[json[i]['category']] = new Array();
								category[json[i]['category']]['name'] = json[i]['category'];
								category[json[i]['category']]['item'] = new Array();
							}

							category[json[i]['category']]['item'].push(json[i]);
						}
					}

					for (i in category) {
						html += '
' + category[i]['name'] + '
';

						for (j = 0; j < category[i]['item'].length; j++) {
							html += '
+ category[i]['item'][j]['value'] + '">   ' + category[i]['item'][j]['label'] + '
';
						}
					}
				}

				if (html) {
					this.show();
				} else {
					this.hide();
				}

				$(this).siblings('ul.dropdown-menu').html(html);
			}

			$(this).after('
');
			$(this).siblings('ul.dropdown-menu').delegate('a', 'click', $.proxy(this.click, this));

		});
	}
})(window.jQuery);

<script>
	$("#b2b_sku_show").autocomplete({
        'source': function (request, response) {
            $.ajax({
                url: 'index.php?route=account/mapping_item_code/autocompletesku&sku=' + encodeURIComponent(request),
                dataType: 'json',
                success: function (json) {
                    response($.map(json, function (item) {
                        return {
                            label: item['sku_show'],
                            value: item['sku'],
                            product_id: item['product_id']
                        }
                    }));
                }
            });
        },
        'select': function (item) {
            $("#b2b_sku_show").val(item['label']);
            $("#b2b_sku").val(item['sku']);
            $("#product_id").val(item['product_id']);
        }
    });
</script>

服务端响应：

[{},{},...]

参考文献

[1] https://www.runoob.com/jquery/jquery-plugin-autocomplete.html
[2] https://www.runoob.com/jqueryui/api-autocomplete.html