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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Sku 多维属性状态判断</title>
    <script src="http://misc.360buyimg.com/jdf/lib/jquery-1.6.4.js"></script>
    <style>
        body {
            font-size: 12px;
        }
        dt {
            width: 100px;
            text-align: right;
        }
        dl {
            clear: both;
            overflow:hidden;
        }
        dl.hl {
            background:#ddd;
        }
        dt, dd {
            float:left;
            height: 40px;
            line-height: 40px;
            margin-left: 10px;
        }
        button {
            font-size: 14px;
            font-weight: bold;
            padding: 4px 4px;
        }
        .disabled {
            color:#999;
            border: 1px dashed #666;
        }
        .active {
            color: red;
        }
    </style>
</head>
<body>

<p>
    <textarea id="data_area" cols="100" rows="10">
[
   { "颜色": "红", "尺码": "大", "型号": "A", "skuId": "3158055" },
   { "颜色": "白", "尺码": "大", "型号": "A", "skuId": "3158054" },
   { "颜色": "白", "尺码": "中", "型号": "B", "skuId": "3133859" },
   { "颜色": "蓝", "尺码": "小", "型号": "C", "skuId": "3516833" }
]
    </textarea>
</p>
<p>
    <input onclick="updateData()" type="button" value="更新数据">
</p>

<hr>

<div id="app"></div>

<hr>

<div id="msg"></div>

<script>
var data = JSON.parse($('#data_area').val())

var res = {}

var spliter = '\u2299'
var r = {}
var keys = []
var selectedCache = []

/**
 * 计算组合数据
 */
function combineAttr(data, keys) {
    var allKeys = []
    var result = {}

    for (var i = 0; i < data.length; i++) {
        var item = data[i]
        var values = []

        for (var j = 0; j < keys.length; j++) {
            var key = keys[j]
            if (!result[key]) result[key] = []
            if (result[key].indexOf(item[key]) < 0) result[key].push(item[key])
            values.push(item[key])
        }
        allKeys.push({
            path: values.join(spliter),
            sku: item['skuId']
        })
    }
    return {
        result: result,
        items: allKeys
    }
}

/**
 * 渲染 DOM 结构
 */
function render(data) {
    var output = ''
    for (var i = 0; i < keys.length; i++) {
        var key = keys[i];
        var items = data[key]

        output += '<dl data-type="'+ key +'" data-idx="'+ i +'">'
        output += '<dt>'+ key +':</dt>'
        output += '<dd>'
        for (var j = 0; j < items.length; j++) {
            var item = items[j]
            var cName = j == 0 ? 'active' : ''
            if (j == 0) { selectedCache.push(item) }
            output += '<button data-title="'+ item +'" class="'+ cName +'" value="'+ item +'">'+ item +'</button> '
        }
        output += '</dd>'
        output += '</dl>'
    }
    output += '</dl>'

    $('#app').html(output)
}

function getAllKeys(arr) {
    var result = []
    for (var i = 0; i < arr.length; i++) { result.push(arr[i].path) }
    return result
}

/**
 * 取得集合的所有子集「幂集」
 arr = [1,2,3]

     i = 0, ps = [[]]:
         j = 0; j < ps.length => j < 1:
             i=0, j=0 ps.push(ps[0].concat(arr[0])) => ps.push([].concat(1)) => [1]
                      ps = [[], [1]]

     i = 1, ps = [[], [1]] :
         j = 0; j < ps.length => j < 2
             i=1, j=0 ps.push(ps[0].concat(arr[1])) => ps.push([].concat(2))  => [2]
             i=1, j=1 ps.push(ps[1].concat(arr[1])) => ps.push([1].concat(2)) => [1,2]
                      ps = [[], [1], [2], [1,2]]

     i = 2, ps = [[], [1], [2], [1,2]]
         j = 0; j < ps.length => j < 4
             i=2, j=0 ps.push(ps[0].concat(arr[2])) => ps.push([3])    => [3]
             i=2, j=1 ps.push(ps[1].concat(arr[2])) => ps.push([1, 3]) => [1, 3]
             i=2, j=2 ps.push(ps[2].concat(arr[2])) => ps.push([2, 3]) => [2, 3]
             i=2, j=3 ps.push(ps[3].concat(arr[2])) => ps.push([2, 3]) => [1, 2, 3]
                      ps = [[], [1], [2], [1,2], [3], [1, 3], [2, 3], [1, 2, 3]]
 */
function powerset(arr) {
    var ps = [[]];
    for (var i=0; i < arr.length; i++) {
        for (var j = 0, len = ps.length; j < len; j++) {
            ps.push(ps[j].concat(arr[i]));
        }
    }
    return ps;
}
/**
 * 生成所有子集是否可选、库存状态 map
 */
function buildResult(items) {
    var allKeys = getAllKeys(items)

    for (var i = 0; i < allKeys.length; i++) {
        var curr = allKeys[i]
        var sku = items[i].sku
        var values = curr.split(spliter)

        // var allSets = getAllSets(values)
        var allSets = powerset(values)

        // 每个组合的子集
        for (var j = 0; j < allSets.length; j++) {
            var set = allSets[j]
            var key = set.join(spliter)

            if (res[key]) {
                res[key].skus.push(sku)
            } else {
                res[key] = {
                    skus: [sku]
                }
            }
        }
    }
}

function trimSpliter(str, spliter) {
    // ⊙abc⊙ => abc
    // ⊙a⊙⊙b⊙c⊙ => a⊙b⊙c
    var reLeft        = new RegExp('^' + spliter + '+', 'g');
    var reRight       = new RegExp(spliter + '+$', 'g');
    var reSpliter = new RegExp(spliter + '+', 'g');
    return str.replace(reLeft, '')
        .replace(reRight, '')
        .replace(reSpliter, spliter)
}

/**
 * 获取当前选中的属性
 */
function getSelectedItem() {
    var result = []
    $('dl[data-type]').each(function () {
        var $selected = $(this).find('.active')
        if ($selected.length) {
            result.push($selected.val())
        } else {
            result.push('')
        }
    })

    return result
}

/**
 * 更新所有属性状态
 */
function updateStatus(selected) {
    for (var i = 0; i < keys.length; i++) {
        var key = keys[i];
        var data = r.result[key]
        var hasActive = !!selected[i]
        var copy = selected.slice()

        for (var j = 0; j < data.length; j++) {
            var item = data[j]
            if (selected[i] == item) continue
            copy[i] = item

            var curr = trimSpliter(copy.join(spliter), spliter)
            var $item = $('dl').filter('[data-type="'+ key +'"]').find('[value="'+ item +'"]')

            var titleStr = '['+ copy.join('-') +']'

            if (res[curr]) {
                $item.removeClass('disabled')
                setTitle($item.get(0))
            } else {
                $item.addClass('disabled').attr('title', titleStr + ' 无此属性搭配')
            }
        }
    }
}

/**
 * 正常属性点击
 */
function handleNormalClick($this) {
    $this.siblings().removeClass('active')
    $this.addClass('active')
}

/**
 * 无效属性点击
 */
function handleDisableClick($this) {
    var $currAttr = $this.parents('dl').eq(0)
    var idx = $currAttr.data('idx')
    var type = $currAttr.data('type')
    var value = $this.val()

    $this.removeClass('disabled')
    selectedCache[idx] = value

    console.log(selectedCache)
    // 清空高亮行的已选属性状态(因为更新的时候默认会跳过已选状态)
    $('dl').not($currAttr).find('button').removeClass('active')
    updateStatus(getSelectedItem())
    
    /**
     * 恢复原来已选属性
     * 遍历所有非当前属性行
     *   1. 与 selectedCache 对比
     *   2. 如果要恢复的属性存在(非 disable)且 和当前*未高亮行*已选择属性的*可组合*),高亮原来已选择的属性且更新
     *   3. 否则什么也不做
     */
    for (var i = 0; i < keys.length; i++) {
        var item = keys[i]
        var $curr = $('dl[data-type="'+ item +'"]')
        if (item == type) continue

        var $lastSelected = $curr.find('button[value="'+ selectedCache[i] +'"]')

        // 缓存的已选属性没有 disabled (可以被选择)
        if (!$lastSelected.hasClass('disabled')) {
            $lastSelected.addClass('active')
          	updateStatus(getSelectedItem())
        }
    }

}

/**
 * 高亮当前属性区
 */
function highLighAttr() {
    for (var i = 0; i < keys.length; i++) {
        var key = keys[i]
        var $curr = $('dl[data-type="'+ key +'"]')
        if ($curr.find('.active').length < 1) {
            $curr.addClass('hl')
        } else {
            $curr.removeClass('hl')
        }
    }
}

function bindEvent() {
    $('#app').undelegate().delegate('button', 'click', function (e) {
        var $this = $(this)

        var isActive = $this.hasClass('.active')
        var isDisable = $this.hasClass('disabled')

        if (!isActive) {
            handleNormalClick($this)

            if (isDisable) {
                handleDisableClick($this)
            } else {
                selectedCache[$this.parents('dl').eq(0).data('idx')] = $this.val()
            }
            updateStatus(getSelectedItem())
            highLighAttr()
            showResult()
        }
    })

    $('button').each(function () {
        var value = $(this).val()

        if (!res[value] && !$(this).hasClass('active')) {
            $(this).addClass('disabled')
        }
    })
}

function showResult() {
    var result = getSelectedItem()
    var s = []

    for (var i = 0; i < result.length; i++) {
        var item = result[i];
        if (!!item) {
            s.push(item)
        }
    }

    if (s.length == keys.length) {
        var curr = res[s.join(spliter)]

        if (curr) {
            s = s.concat(curr.skus)
        }
        $('#msg').html('已选择:' + s.join('\u3000-\u3000'))
    }
}

function updateData() {
    data = JSON.parse($('#data_area').val())
    init(data)
}

function setTitle(el) {
    var title = $(el).data('title');
    if (title) $(el).attr('title', title);
}
function setAllTitle() {
    $('#app').find('button').each(setTitle)
}

function init(data) {
    res = {}
    r = {}
    keys = []
    selectedCache = []

    for (var attr_key in data[0]) {
        if (!data[0].hasOwnProperty(attr_key)) continue;
        if (attr_key != 'skuId') keys.push(attr_key)
    }
    setAllTitle();

    r = combineAttr(data, keys)

    render(r.result)

    buildResult(r.items)

    updateStatus(getSelectedItem())
    showResult()

    bindEvent()
}

init(data)


</script>

</body>
</html>
            
          
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