Combobox

思路：

控件封装首先应该考虑到兼容任何web框架，这样可以达到重复使用的效果。这里使用jquery方式来实现控件主体部分。

全局事件管理：

(function (global, $, factory) {
    global = factory.call(global, $);
})(window, $, function ($) {
    var DUI = {};
    window.DUI = window.$$ = DUI;
    window.$$.Event = function (props) {
        if (!(this instanceof $$.Event))
            return new $$.Event(props);
        this.oldValue = null;
        this.newValue = null;
        this.element = null;
        this.params = {};
        $.extend(this, props);
    };

    window.$$.trigger = function (type, el, args) {
        var event = $.Event(type, args);
        el.trigger(event, args);
    };
})

jquery主体实现：

  /*
     combobox UI
     */
    var uuid = -1;
    var __Combobox__ = function (ops) {
        this.__eventNameSpave__ = ".combobox-event";
        this.__ComboboxC__ = {
            root: $('body'),
            inputId: 'ui-combobox-input-',
            dorpdownId: 'ui-combobox-dropdown-',
            popupId: 'ui-combobox-popup-',
            placeHolderId: 'ui-combobox-placeholder-',
            listboxId: 'ui-combobox-listboxId-',
            items: [],
            popupOpend: false,
            oldValue: {},
            newValue: {},
            selectedIndex: -1,
            selectedItem: {}
        };
        this.__delay__ = 200;
        this.__$Dom__ = {};
        this.__filterSelectionResultIndex__ = [];
        this.__extends__(ops, this.__ComboboxC__);
        this.__element__ = this.__ComboboxC__.root;
        this.__initId__().__init__().__load__();
    }

    __Combobox__.prototype = {
        __initId__: function () {
            this.__uuId = ++uuid;
            this.__ComboboxC__.inputId += uuid;
            this.__ComboboxC__.dorpdownId += uuid;
            this.__ComboboxC__.popupId += uuid;
            this.__ComboboxC__.placeHolderId += uuid;
            this.__ComboboxC__.listboxId += uuid;
            return this;
        },
        __init__: function () {
            this.__element__.css('width', this.__ComboboxC__.width + 'px')
                .css('height', this.__ComboboxC__.height + 'px')
                .addClass('ui-combobox');
            this.__createCombobox__()
                .__createDropDown__()
                .__createPopup__()
                .__initDom__()
                .__bindEvent__();
            return this;
        },
        __createCombobox__: function () {
            var h = -1, fragement = [];
            fragement[++h] = "<input id='" + this.__ComboboxC__.inputId + "' class="ui-combobox-input" />";
            fragement[++h] = "<div class="ui-combobox-placeholder">";
            fragement[++h] = "<div id='>" + this.__ComboboxC__.placeHolderId + "<' /div>";
            fragement[++h] = "</div>";
            this.__element__.append(fragement.join(''));
            return this;
        },
        __createDropDown__: function () {
            var h = -1, fragement = [];
            fragement[++h] = "<div id=" + this.__ComboboxC__.dorpdownId + " class="ui-combobox-dropdown-container">";
            fragement[++h] = "<div class="ui-dorpdown-icon"></div>";
            fragement[++h] = "</div>";
            this.__element__.append(fragement.join(''));
            return this;
        },
        __createPopup__: function () {
            var h = -1, fragement = [];
            fragement[++h] = "<div class="ui-combobox-popup" id=" + this.__ComboboxC__.popupId + ">";
            fragement[++h] = "<div class="ui-combobox-listbox">";
            fragement[++h] = "<div class="ui-combobox-listbox-container" id=" + this.__ComboboxC__.listboxId + ">";
            fragement[++h] = "</div>";
            fragement[++h] = "</div>";
            fragement[++h] = "</div>";
            $('body').append(fragement.join(''));
            return this;
        },
        __initDom__: function () {
            this.__$Dom__.$listbox = $('#' + this.__ComboboxC__.listboxId);
            this.__$Dom__.$input = $('#' + this.__ComboboxC__.inputId);
            this.__$Dom__.$popup = $('#' + this.__ComboboxC__.popupId);
            return this;
        },
        __load__: function () {
            this.__seSelectionItems__().__setSelectionEvent__();
            this.__$Dom__.$popup.hide();
        },
        setOptions: function (key, ops) {
            var self = this,
                clr = {
                    setStyle: self.__setSytle__.bind(this),
                    setItems: self.__setItems__.bind(this),
                    setSelectedItem: self.__setSelectedItem__.bind(this)
                };
            clr[key](ops);
        },
        __setSytle__: function (ops) {
            this.__$Dom__.$popup.css('width', ops.popupWidth)
                .css('height', ops.popupHeight)
                .css('max-width', ops.popupMaxWidth)
                .css('max-height', ops.popupMaxHeight)
            return this;
        },

        __setItems__: function (ops) {
            this.__ComboboxC__.items = ops.items;
            this.__seSelectionItems__()
                .__setSelectionEvent__()
                .__setSelectedItem__(ops.selectedItem);
        },
        __seSelectionItems__: function () {
            var tempItems = this.__ComboboxC__.items;
            var i = 0, len = tempItems.length, fragement = [];
            this.__$Dom__.$listbox.empty();
            for (; i < len; i++) {
                fragement.push("<div class="ui-combobox-selection-container">");
                fragement.push("<div role='option' class="ui-combobox-selection" id=ui-combobox-selection-select-option-" + i + ">");
                fragement.push(tempItems[i].name);
                fragement.push("</div>");
                fragement.push("</div>");
            }
            this.__$Dom__.$listbox.append(fragement.join(''));
            return this;
        },
        __setSelectedItem__: function (selectedItem) {
            var self = this,
                clr = {
                    object: function () {
                        return selectedItem.name;
                    },
                    string: function () {
                        return selectedItem;
                    },
                    undefined: function () {
                        return self.__ComboboxC__.items[0];
                    }
                }, selectedText = "";
            selectedText = clr[typeof selectedItem]();
            for (var i = 0; i < this.__ComboboxC__.items.length; i++) {
                if (this.__ComboboxC__.items[i].name == selectedText) {
                    this.__ComboboxC__.selectedIndex = i;
                }
            }
            this.__$Dom__.$selections.removeClass('ui-combobox-selection-selected');
            if (this.__ComboboxC__.selectedIndex != -1) {
                var inputValue = this.__ComboboxC__.items[this.__ComboboxC__.selectedIndex].name;
                this.__$Dom__.$input[0].value = inputValue;
                this.__$Dom__.$selections[this.__ComboboxC__.selectedIndex].classList.add('ui-combobox-selection-selected');
                this.__ComboboxC__.newValue = this.__ComboboxC__.items[this.__ComboboxC__.selectedIndex];
            } else {
                this.__$Dom__.$input[0].value = '';
                this.__$Dom__.$selections[0].classList.add('ui-combobox-selection-selected');
                this.__ComboboxC__.newValue = null;
            }
            this.__hide__();
            return this;
        },

        __bindEvent__: function () {
            var self = this;
            this.__$Dom__.$input.on('mousedown' + this.__eventNameSpave__, function (e) {
                self.__hideShow__();
            }).on('focus' + this.__eventNameSpave__, function (e) {
                self.__element__.addClass('ui-combobox-focused');
            }).on('blur' + this.__eventNameSpave__, function (e) {
                self.__element__.removeClass('ui-combobox-focused');
                self.__hide__();
            }).on('mouseover' + this.__eventNameSpave__, function () {
                self.__element__.addClass('ui-combobox-mouseover');
            }).on('mouseleave' + this.__eventNameSpave__, function () {
                self.__element__.removeClass('ui-combobox-mouseover');
            }).on('keyup', + this.__eventNameSpave__, this.__onInputkeyDown__.bind(this));

            this.__debounceHandler__ = this.__debounce__(this.__filterSelection__.bind(this));

            this.__$Dom__.$listbox.on('mousedown' + this.__eventNameSpave__, function (e) {
                e.stopPropagation();
                e.preventDefault();
            });
            $('#' + this.__ComboboxC__.dorpdownId).on('click' + this.__eventNameSpave__, function (e) {
                self.__hideShow__();
            });

        },

        __setSelectionEvent__: function () {
            var self = this;
            this.__$Dom__.$selections = $('#' + this.__ComboboxC__.listboxId + ' .ui-combobox-selection');
            this.__$Dom__.$selections.on('click' + this.__eventNameSpave__, function (e) {
                var text = e.currentTarget.textContent;
                self.__setSelectedItem__(text);
                $$.trigger("selectionChanged", self.__element__, $$.Event({
                    element: self.__element__,
                    oldValue: self.__ComboboxC__.oldValue,
                    newValue: self.__ComboboxC__.newValue
                }))
                self.__ComboboxC__.oldValue = self.__ComboboxC__.newValue;
            });
            return this;
        },

        __onInputkeyDown__: function (e) {
            var self = e.data,
                keyCode = e.which;
            this.__debounceHandler__(e.target.value);
        },

        __debounce__: function (fn) {
            var
                timer,
                self = this;
            return function (e) {
                clearTimeout(timer);
                timer = setTimeout(function () {
                    fn.apply(self, [e])
                }, self.__delay__);
            }
        },

        __filterSelection__: function (e) {
            console.log(e);
            var condition = this.__getCondition__();
            var i = 0,
                len = this.__ComboboxC__.items.length,
                items = this.__ComboboxC__.items;
            for (var i = 0; i < len; i++) {
                var name = this.__getInputValue__(items[i]);
                if (name.indexOf(condition) > -1) {
                    this.__filterSelectionResultIndex__.push(i);
                }
            };
            this.__updateFilteredSelections__();
            this.__filterSelectionResultIndex__.length = 0;
        },
        __getCondition__: function () {
            var value = '';
            value = this.__$Dom__.$input.val().toLowerCase();
            return value;
        },

        __getInputValue__: function (item) {
            return item['name'];
        },

        __updateFilteredSelections__: function () {
            var items = this.__ComboboxC__.items,
                i = 0,
                len = items.length;
            for (; i < len; i++) {
                if (this.__filterSelectionResultIndex__.includes(i)) {
                    $(this.__$Dom__.$listbox.children()[i]).show();
                } else {
                    $(this.__$Dom__.$listbox.children()[i]).hide();
                }
            }
            this.__show__();
        },

        __hideShow__: function () {
            this.__ComboboxC__.popupOpend = !this.__ComboboxC__.popupOpend;
            if (this.__ComboboxC__.popupOpend)
                this.__show__();
            else
                this.__hide__();
        },

        __hide__: function () {
            this.__ComboboxC__.popupOpend = false;
            this.__$Dom__.$popup.hide();
        },

        __show__: function () {
            this.__ComboboxC__.popupOpend = true;
            this.__$Dom__.$popup.show();
            this.__setPopupPosition__();
            this.__$Dom__.$selections.removeClass('ui-combobox-selection-selected');
            if (this.__filterSelectionResultIndex__.length == 0 && this.__$Dom__.$selections.length == this.__ComboboxC__.items.length) {
                if (this.__ComboboxC__.selectedIndex == -1)
                    $(this.__$Dom__.$selections[0]).addClass('ui-combobox-selection-selected');
                else
                    $(this.__$Dom__.$selections[this.__ComboboxC__.selectedIndex]).addClass('ui-combobox-selection-selected');
                return;
            }
            if (this.__filterSelectionResultIndex__.includes(this.__ComboboxC__.selectedIndex)) {
                $(this.__$Dom__.$selections[this.__ComboboxC__.selectedIndex]).addClass('ui-combobox-selection-selected');
                return;
            } else {
                $(this.__$Dom__.$selections[this.__filterSelectionResultIndex__[0]]).addClass('ui-combobox-selection-selected');
                return;
            }
            console.log('no select items.');
        },

        __setPopupPosition__: function () {
            var self = this;
            this.__$Dom__.$popup
                .css({ top: 0 })
                .position({
                    my: "left top",
                    at: "left bottom",
                    of: self.__element__,
                    collision: "flip"
                })
        },

        __extends__: function (ops, target) {
            for (var i in ops) {
                if (typeof ops[i] !== undefined) target[i] = ops[i];
            }
        }
    }

react外层包装：

import ReactWidget from './react-widget';
class Combobox extends ReactWidget {
    constructor(props) {
        super(props);
        this.element = {};
        this.state = {
            items: []
        };
    }

    componentWillReceiveProps(newPorps) {
        if (newPorps.items.length !== 0)
            this.element.setOptions('setItems', {
                items: newPorps.items
            })
        if (newPorps.selectedItem != null)
            this.element.setOptions('setSelectedItem', newPorps.selectedItem)
    }

    componentDidMount() {
        this.element = new aui.Combobox({
            root: $(ReactDOM.findDOMNode(this)),
            items: this.props.items
        });
        $(ReactDOM.findDOMNode(this)).on('selectionChanged', this.selectionChangedHandler.bind(this));
    }

    selectionChangedHandler(e, args) {
        this.props.selectionChanged(e, args);
    }

    render() {
        return <div></div>
    }
}

window.$$.Combobox = Combobox;

样式：

section {
    border-bottom: 1px solid #FF9900;
    padding: 5px;
}

/*
    icon
*/
.ui-dorpdown-icon {
    height: auto;
    width: 20px;

    &:after {
        content: '25BC'
    }
}

/*
    dialog 
*/
button {
    border: 1px solid #9D9D9D;
    background-color: #fff;
    height: auto;
    padding: 5px 20px;
    border-radius: 5px;
    color: #9D9D9D;
    font-weight: inherit;
    font-style: inherit;
    font-family: inherit;
    cursor: pointer;

    &:hover {
        background: #9D9D9D;
        color: #fff;
    }
}

.ui-backdrop {
    POSITION: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(34, 34, 34, 0.5);
    z-index: 99;
}

.dialog {
    position: fixed;
    z-index: 100;
    top: 50%;
    left: 50%;
    right: 0;
    bottom: 0;
    border: 1px solid #ff9900;
    border-radius: 5px;
    text-align: center;
    background: #ffffff;

    .dialog-title {
        width: auto;
        height: 40px;
        line-height: 40px;
        background-color: #ff9900;
        font-weight: bold;
        color: #ffffff;
    }

    .dialog-content {
        padding: 10px;
    }

    .dialog-footer {
        position: absolute;
        bottom: 0px;
        background-color: #ff9900;
        width: 100%;
        height: auto;
        padding: 2px 0;
    }
}

/* 
    banner 
*/
.banner {
    position: relative;
    width: 100%;
    height: 400px;

    .banner-indicators {
        position: absolute;
        bottom: 20px;
        z-index: 10;
        width: 60%;
        padding-left: 0;
        list-style: none;
        text-align: center;
        width: 25%;
        left: 42%;

        .banner-indicators-item {
            list-style: none;
            float: left;
            width: 50px;
            padding: 5px 0;
            margin: 0 2px;
            opacity: 0.5;
            border: 0;
            background-color: #fff;
            height: auto;
            border-radius: 5px;
            margin-right: 50px;
            cursor: pointer;
        }

        .active {
            background-image: -webkit-linear-gradient(left, #9D9D9D, #000000 25%, #4F4F4F 50%, #000000 75%, #9D9D9D 100%);
            -webkit-text-fill-color: transparent;
            -webkit-animation: indicators-animation 2s infinite linear;
        }

        @-webkit-keyframes indicators-animation {
            0% {
                background: #9D9D9D;
                border: 3px solid #ffffff;
            }

            50% {
                background: #000000;
                border: 3px solid #9D9D9D;
            }

            100% {
                background: #9D9D9D;
                border: 3px solid #ffffff;
            }
        }
    }

    .banner-inner {
        width: 100%;
        height: 100%;
        overflow: hidden;

        .banner-content {
            width: 300%;
            height: 100%;
            transform: translate3d(-66.66666666%, 0, 0);
            transition: transform 0.6s ease-in-out;
            -webkit-transition: -webkit-transform 0.6s ease-in-out;

            .banner-item {
                display: inline-block;
                position: relative;
                width: 33.333333333%;
                height: 100%;
                background-repeat: no-repeat;
                background-size: cover;

                &:nth-child(1) {
                    background-image: url('./Image/banner0.jpg');
                }

                &:nth-child(2) {
                    background-image: url('./Image/banner1.jpg');
                }

                &:nth-child(3) {
                    background-image: url('./Image/banner2.jpg');
                }

                .banner-item-inner {
                    .title {
                        visibility: hidden;
                        transform: translate3d(-15%, 350%, 0);
                        transition: transform 0.3s ease-in-out;
                        -webkit-transition: -webkit-transform 0.3s ease-in-out;
                    }

                    .description {
                        visibility: hidden;
                        transform: translate3d(100%, 300%, 0);
                        transition: transform 0.3s ease-in-out;
                        -webkit-transition: -webkit-transform 0.3s ease-in-out;
                    }
                }

                .active {
                    .title {
                        visibility: visible;
                        transform: translate3d(30%, 350%, 0);
                    }

                    .description {
                        visibility: visible;
                        transform: translate3d(60%, 300%, 0);
                    }
                }

                .banner-item-inner {
                    p {
                        font-size: 40px;
                        font-weight: bold;
                        color: #fff;
                        font-style: italic;
                    }
                }
            }
        }
    }
}

.ui-combobox {
    position: relative;
    width: 200px;
    min-width: 50px;
    height: 30px;
    line-height: 30px;
    background-color: #fff;
    border: 1px solid #bbb;
    outline: 0;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;

    .ui-combobox-input {
        position: absolute;
        width: 100%;
        height: 100%;
        margin: 0 auto;
        outline: 0;
        overflow: hidden;
        resize: none;
        border: none;
        background: #fff;
        cursor: default;
        padding: 1px 30px 1px 5px;
        -moz-box-sizing: border-box;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
    }

    .ui-combobox-dropdown-container {
        position: absolute;
        height: 100%;
        right: 0;
        top: 0;
        border-left: 1px solid transparent;
        cursor: default;
    }

    .ui-combobox-placeholder {
        position: absolute;
        display: table;
        table-layout: fixed;
        height: 100%;
        top: 0;
        left: 5px;
        -moz-box-sizing: border-box;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
        color: #aaa;
    }
}

.ui-combobox-focused {
    border-color: #49d;
}

.ui-combobox-mouseover {
    border-color: #49d;
}

.ui-combobox-popup-shown {
    border-color: #49d;
}

.ui-combobox-popup {
    position: absolute;
    width: 198px;
    height: auto;
    background-color: #ffffff;
    border: 1px solid #bbb;
    box-sizing: content-box;

    .ui-combobox-listbox {
        height: auto;
        max-height: 300px;
        min-height: 22px;
        list-style: none;
        overflow: auto;
        background-color: #ffffff;
        box-sizing: border-box;

        .ui-combobox-listbox-container {
            display: table;
            width: 100%;

            .ui-combobox-selection-container {
                display: table-row;

                &:hover {
                    background-color: #F0F0F0;
                }

                .ui-combobox-selection {
                    display: table-cell;
                    border: 1px solid #ffffff;
                    outline: 0;
                    white-space: nowrap;
                    padding: 13px 0 13px 5px;
                    line-height: 1px;
                    cursor: default;
                }

                .ui-combobox-selection-selected {
                    background-color: #bbb;
                }
            }
        }
    }
}

/*
    loading
*/

.ui-loading {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 99999;
    display: block;
    text-align: center;

    &::before {
        content: '';
        height: 100%;
        width: 0;
        vertical-align: middle;
        display: inline-block;
    }

    .ui-loading-dialog {
        position: relative;
        vertical-align: middle;
        display: inline-block;

        .ui-loading-circle {
            position: relative;
            height: 60px;
            width: 60px;
            border-radius: 50%;
            background-color: #9D9D9D;

            &::before {
                height: 4px;
                width: 100%;
                left: 0;
                top: 28px;
                z-index: 1;
                position: absolute;
                content: "";
                background: #fff;
            }

            &::after {
                width: 4px;
                height: 100%;
                top: 0;
                right: 28px;
                position: absolute;
                content: "";
                background: #ffffff;
            }

            .left {
                position: absolute;
                height: 100%;
                width: 50%;
                overflow: hidden;
                left: 0;
            }

            .right {
                position: absolute;
                overflow: hidden;
                height: 100%;
                width: 50%;
                left: 50%;
            }

            .center {
                position: absolute;
                top: 6px;
                left: 6px;
                height: 48px;
                width: 48px;
                background: #fff;
                border-radius: 50%;
            }

            .anim {
                position: absolute;
                left: 100%;
                top: 0;
                height: 100%;
                width: 100%;
                border-radius: 999px;
                background-color: #ff9900;
                -webkit-animation: aui-circle-loading-left 2s infinite;
                animation: aui-circle-loading-left 2s infinite;
                -webkit-transform-origin: 0 50% 0;
                transform-origin: 0 50% 0;
                -webkit-animation-duration: 2s;
                -webkit-animation-timing-function: linear;
                animation-duration: 2s;
                animation-timing-function: linear;
            }


            .right .anim {
                -webkit-animation-name: aui-circle-loading-right;
                animation-name: aui-circle-loading-right;
            }

            .left .anim {
                border-bottom-left-radius: 0;
                border-top-left-radius: 0;
            }

            .right .anim {
                border-bottom-right-radius: 0;
                border-top-right-radius: 0;
                left: -100%;
                -webkit-transform-origin: 100% 50% 0;
                transform-origin: 100% 50% 0;
            }
        }
    }
}

@keyframes aui-circle-loading-left {
    0% {
        transform: rotate(0deg)
    }

    25% {
        transform: rotate(0deg)
    }

    50% {
        transform: rotate(180deg)
    }

    75% {
        transform: rotate(180deg)
    }

    100% {
        transform: rotate(360deg)
    }
}


@keyframes aui-circle-loading-right {
    0% {
        transform: rotate(0deg)
    }

    25% {
        transform: rotate(180deg)
    }

    50% {
        transform: rotate(180deg)
    }

    75% {
        transform: rotate(360deg)
    }

    100% {
        transform: rotate(360deg)
    }
}

效果：