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JS仿百度搜索自動提示框匹配查詢功能

2019-11-20 21:37:32
字體:
供稿:網(wǎng)友

1. 添加動態(tài)加載css文件 不需要引入css css全部在JS動態(tài)生成。
2. 不需要額外的標(biāo)簽 只需要一個input輸入框 并且默認(rèn)指定一個class類名為 "inputElem" 當(dāng)然也可以自己配置參數(shù) 還需要一個當(dāng)前父級容器增加一個默認(rèn)類名 parentCls(也可以自己配置),因為輸入框匹配值后需要一個隱藏域 所以需要隱藏域增加一個class "hiddenCls" 當(dāng)然也支持自己配置參數(shù)。

如下代碼:

復(fù)制代碼 代碼如下:

<div class="parentCls">
        <div style="width:200px;height:26px;border:1px solid #ccc;">
            <input type="text" class="inputElem" style="width:200px;height:26px;line-height:26px;"/>
        </div>
        <input type="hidden" class="hiddenCls"/>
    </div>


    <div class="parentCls">
        <div style="width:200px;height:26px;border:1px solid #ccc;">
            <input type="text" class="inputElem" style="width:200px;height:26px;line-height:26px;"/>
        </div>
        <input type="hidden" class="hiddenCls"/>
    </div>

3. 支持頁面上有多個輸入框。

4. 支持鼠標(biāo)點擊和 鍵盤 上移和下移鍵操作 類似于百度輸入框。
頁面上所有的標(biāo)簽都是動態(tài)的生成的,不需要額外的標(biāo)簽。如上面的 只需要input標(biāo)簽 其他的div標(biāo)簽不依賴 只需要父級元素增加class "parentCls"(當(dāng)然可以自己配置類名),
及要傳給后臺開發(fā)人員的隱藏域輸入框 增加一個class "hiddenCls" 當(dāng)然也可以自動配置參數(shù)。

我的模糊查詢匹配的需求是這樣的:
1. 每keyup時候 點擊或者鍵盤上移下移操作 輸入框填充用戶名/工號 隱藏域填充工號 發(fā)請求 服務(wù)器返回數(shù)據(jù) 渲染出來。當(dāng)然 隱藏域填充工號 值是form表單提交時候 后臺要拿到提交過來的工號 所以需要這么一個隱藏域。
2. 當(dāng)用戶直接在輸入框輸入值時候 并沒有鍵盤上移下移 或者 點擊下拉框某一項時候 當(dāng)鼠標(biāo)失去焦點時候(blur) 當(dāng)前輸入框值為空 隱藏域值為空,這樣做的目的 是為了防止上次form提交過后的數(shù)據(jù)仍然保存在隱藏域里面 當(dāng)用戶重新輸入的時候 用戶也并沒有操作鍵盤上下移操作或者點擊操作 再點擊提交按鈕時(失去焦點),那么值為空 隱藏域值為空 這樣防止搜索出來不是用戶輸入的那個東東。
3. 當(dāng)用戶點擊某一項時候 或者 上移下移時候 輸入框動態(tài)的生成值 且輸入框值現(xiàn)在不能重新輸入 只有當(dāng)點擊輸入框x的時候 才可以重新輸入。
4. 已經(jīng)遺留輸入框可以多選的接口 目前還未完善輸入框多選的操作。
5. 禁止ctrl+v 或者右鍵 粘貼操作。

下面HTML代碼如下:

復(fù)制代碼 代碼如下:

<div class="parentCls">
        <div style="width:200px;height:26px;border:1px solid #ccc;">
            <input type="text" class="inputElem" style="width:200px;height:26px;line-height:26px;"/>
        </div>
        <input type="hidden" class="hiddenCls"/>
    </div>


    <div class="parentCls">
        <div style="width:200px;height:26px;border:1px solid #ccc;">
            <input type="text" class="inputElem" style="width:200px;height:26px;line-height:26px;"/>
        </div>
        <input type="hidden" class="hiddenCls"/>
    </div>

    <input type="button" value="提交"/>

JS代碼如下:

復(fù)制代碼 代碼如下:

/**
 * JS 模糊查詢
 * @author tugenhua
 * @date 2013-11-19
 * @param 1.當(dāng)前的input add targetCls
 * 2. 隱藏域里面統(tǒng)一增加同類名 叫 hiddenCls
 * 3. 在各個父級元素上 添加類名 parentCls
 */

 function AutoComplete (options) {
     this.config = {
        targetCls          : '.inputElem',          // 輸入框目標(biāo)元素
        parentCls          : '.parentCls',          // 父級類
        hiddenCls          : '.hiddenCls',          // 隱藏域input
        searchForm         :'.jqtransformdone',     //form表單
        hoverBg            : 'hoverBg',             // 鼠標(biāo)移上去的背景
        outBg              : 'outBg',               // 鼠標(biāo)移下拉的背景
        isSelectHide       : true,                 // 點擊下拉框 是否隱藏
        url                : '',                    // url接口
        height             : 0,                     // 默認(rèn)為0 不設(shè)置的話 那么高度自適應(yīng)
        manySelect         : false,                 // 輸入框是否多選 默認(rèn)false 單選
        renderHTMLCallback : null,                  // keyup時 渲染數(shù)據(jù)后的回調(diào)函數(shù)
        callback           : null,                  // 點擊某一項 提供回調(diào)
        closedCallback     : null                   // 點擊輸入框某一項x按鈕時 回調(diào)函數(shù)
     };

     this.cache = {
        currentIndex        : -1,
        oldIndex            : -1,
        inputArrs           : []                 // 多選時候 輸入框值放到數(shù)組里面去
     };
     this.init(options);
 }

 AutoComplete.prototype = {

    constructor: AutoComplete,
    init: function(options) {

        this.config = $.extend(this.config, options || {});
        var self = this,
            _config = self.config,
            _cache = self.cache;

         // 鼠標(biāo)點擊輸入框時候
          $(_config.targetCls).each(function(index,item) {

              /*
               *  禁止 ctrl+v 和 黏貼事件
               */
              $(item).unbind('paste');
              $(item).bind('paste',function(e){
                  e.preventDefault();
                  var target = e.target,
                      targetParent = $(target).closest(_config.parentCls);
                  $(this).val('');
                  $(_config.hiddenCls,targetParent) && $(_config.hiddenCls,targetParent).val('');
              });

              $(item).keyup(function(e){
                  _cache.inputArrs = [];
                  var targetVal = $.trim($(this).val()),
                      keyCode = e.keyCode,
                      elemHeight = $(this).outerHeight(),
                      elemWidth = $(this).outerWidth();

                  // 如果輸入框值為空的話 那么隱藏域的value清空掉
                  if(targetVal == '') {
                       var curParents = $(this).closest(_config.parentCls);
                       $(_config.hiddenCls,curParents).val('');
                  }
                  var targetParent = $(this).parent();
                  $(targetParent).css({'position':'relative'});

                  if($('.auto-tips',targetParent).length == 0) {
                      // 初始化時候 動態(tài)創(chuàng)建下拉框容器
                     $(targetParent).append($('<div class="auto-tips hidden"></div>'));
                     $('.auto-tips',targetParent).css({'position':'absolute','top':elemHeight,'left':'0px','z-index':999,'width':elemWidth,'border':'1px solid #ccc'});
                  }

                 
                  var curIndex = self._keyCode(keyCode);
                  if(curIndex > -1){
                          self._keyUpAndDown(targetVal,e,targetParent);
                    }else {
                         if(targetVal != '') {
                            self._doPostAction(targetVal,targetParent);
                         }

                    }
              });

              // 失去焦點時 如果沒有點擊 或者上下移時候 直接輸入 那么當(dāng)前輸入框值情況 隱藏域值情況
              $(item).blur(function(e){
                  var target = e.target,
                      targetParent = $(target).closest(_config.parentCls);
                  if($(this).attr('up') || $(this).attr('down')) {
                     return;
                  }else {
                     $(this).val('');
                     $(_config.hiddenCls,targetParent).val('');
                  }
              });

          });

          // 阻止form表單默認(rèn)enter鍵提交
          $(_config.searchForm).each(function(index,item) {
               $(item).keydown(function(e){
                    var keyCode = e.keyCode;
                    if(keyCode == 13) {
                        return false;
                    }
               });
          });

          // 點擊文檔
          $(document).click(function(e){
             e.stopPropagation();
             var target = e.target,
                 tagParent = $(target).parent(),
                 attr = $(target,tagParent).closest('.auto-tips');

             var tagCls = _config.targetCls.replace(/^/./,'');

             if(attr.length > 0 || $(target,tagParent).hasClass(tagCls)) {
                return;
             }else {
                $('.auto-tips').each(function(index,item){
                    !$(item,tagParent).hasClass('hidden') && $(item,tagParent).addClass('hidden');
                });

             }
          });

          var stylesheet = '.auto-tips { margin: 0 1px; list-style: none;height:auto !important;padding: 0px;position:absolute; border:1px solid #ccc; top:27px; left:0; z-index:999; width:100%;background:#fff !important;}' +
                           '.auto-tips p {overflow: hidden;margin: 1px 0;padding: 5px 5px;border-bottom: 1px solid #e7e7e7;color: #666;text-decoration: none;line-height: 23px;white-space: nowrap;cursor: pointer;zoom: 1;}' +
                           '.auto-tips p img{ vertical-align:middle;float:left;}' +
                           '.create-input{line-height:26px,padding-left:3px;}' +
                           '.create-input span{margin-top:1px;height:24px;float:left;}' +
                           '.create-input span i,.auto-tips span a{font-style:normal;float:left;cursor:default;}' +
                           '.create-input span a{padding:0 8px 0 3px;cursor:pointer;}' +
                           '.auto-tips p.hoverBg {background-color: #669cb6;color: #fff;cursor: pointer;}' +
                           '.hidden {display:none;}';

          this._addStyleSheet(stylesheet);

    },
    /**
     * 鍵盤上下鍵操作
     */
    _keyUpAndDown: function(targetVal,e,targetParent) {
        var self = this,
            _cache = self.cache,
            _config = self.config;

        // 如果請求成功后 返回了數(shù)據(jù)(根據(jù)元素的長度來判斷) 執(zhí)行以下操作
        if($('.auto-tips p',targetParent) && $('.auto-tips p',targetParent).length > 0) {

            var plen = $('.auto-tips p',targetParent).length,
                keyCode = e.keyCode;
                _cache.oldIndex = _cache.currentIndex;

            // 上移操作
            if(keyCode == 38) {
                if(_cache.currentIndex == -1) {
                    _cache.currentIndex = plen - 1;
                }else {
                    _cache.currentIndex = _cache.currentIndex - 1;
                    if(_cache.currentIndex < 0) {
                        _cache.currentIndex = plen - 1;
                    }
                }
                if(_cache.currentIndex !== -1) {

                    !$('.auto-tips .p-index'+_cache.currentIndex,targetParent).hasClass(_config.hoverBg) &&
                    $('.auto-tips .p-index'+_cache.currentIndex,targetParent).addClass(_config.hoverBg).siblings().removeClass(_config.hoverBg);
                    var curAttr = $('.auto-tips .p-index'+_cache.currentIndex,targetParent).attr('data-html'),
                        embId = $('.auto-tips .p-index'+_cache.currentIndex,targetParent).attr('embId');

                    // 判斷是否是多選操作 多選操作 暫留接口
                    if(_config.manySelect) {
                        _cache.inputArrs.push(curAttr);
                        _cache.inputArrs = self._unique(_cache.inputArrs);
                        self._manySelect(targetParent);
                    }else {
                        $(_config.targetCls,targetParent).val(curAttr);
                        // 上移操作增加一個屬性 當(dāng)失去焦點時候 判斷有沒有這個屬性
                        if(!$(_config.targetCls,targetParent).attr('up')){
                            $(_config.targetCls,targetParent).attr('up','true');
                        }
                       

                        var pCls = $(_config.targetCls,targetParent).closest(_config.parentCls);
                        $(_config.hiddenCls,pCls).val(embId);

                        self._createDiv(targetParent,curAttr);
                        self._closed(targetParent);
                        // hover
                        self._hover(targetParent);
                    }

                }

            }else if(keyCode == 40) { //下移操作
                if(_cache.currentIndex == plen - 1) {
                    _cache.currentIndex = 0;
                }else {
                    _cache.currentIndex++;
                    if(_cache.currentIndex > plen - 1) {
                        _cache.currentIndex = 0;
                    }
                }
                if(_cache.currentIndex !== -1) {

                    !$('.auto-tips .p-index'+_cache.currentIndex,targetParent).hasClass(_config.hoverBg) &&
                    $('.auto-tips .p-index'+_cache.currentIndex,targetParent).addClass(_config.hoverBg).siblings().removeClass(_config.hoverBg);
                    var curAttr = $('.auto-tips .p-index'+_cache.currentIndex,targetParent).attr('data-html'),
                        embId = $('.auto-tips .p-index'+_cache.currentIndex,targetParent).attr('embId');

                   
                    // 判斷是否是多選操作 多選操作 暫留接口
                    if(_config.manySelect) {
                        _cache.inputArrs.push(curAttr);
                        _cache.inputArrs = self._unique(_cache.inputArrs);
                        self._manySelect(targetParent);
                    }else {
                        $(_config.targetCls,targetParent).val(curAttr);

                        // 下移操作增加一個屬性 當(dāng)失去焦點時候 判斷有沒有這個屬性
                        if(!$(_config.targetCls,targetParent).attr('down')){
                            $(_config.targetCls,targetParent).attr('down','true');
                        }

                        var pCls = $(_config.targetCls,targetParent).closest(_config.parentCls);
                        $(_config.hiddenCls,pCls).val(embId);
                        self._createDiv(targetParent,curAttr);
                        self._closed(targetParent);
                        // hover
                        self._hover(targetParent);
                    }

                }
            }else if(keyCode == 13) { //回車操作
                var curVal = $('.auto-tips .p-index'+_cache.oldIndex,targetParent).attr('data-html');
                $(_config.targetCls,targetParent).val(curVal);
                if(_config.isSelectHide) {
                    !$(".auto-tips",targetParent).hasClass('hidden') && $(".auto-tips",targetParent).addClass('hidden');
                }

                _cache.currentIndex = -1;
                _cache.oldIndex = -1;

            }
        }
    },
    // 鍵碼判斷
    _keyCode: function(code) {
        var arrs = ['17','18','38','40','37','39','33','34','35','46','36','13','45','44','145','19','20','9'];
        for(var i = 0, ilen = arrs.length; i < ilen; i++) {
            if(code == arrs[i]) {
                return i;
            }
        }
        return -1;
    },
    _doPostAction: function(targetVal,targetParent) {

        var  self = this,
             _cache = self.cache,
             _config = self.config,
             url = _config.url;

        // 假如返回的數(shù)據(jù)如下:
        var results = [{lastName:'tugenhua',emplId:'E0987',image:''},{lastName:'tugenhua',emplId:'E0988',image:''},{lastName:'tugenhua',emplId:'E0989',image:''}];
        self._renderHTML(results,targetParent);
        self._executeClick(results,targetParent);
       /** $.get(url+"?keyword="+targetVal+"×tamp="+new Date().getTime(),function(data){
            var ret = $.parseJSON(data.content),
                results = ret.results;
            if(results.length > 0) {
                self._renderHTML(results,targetParent);
                self._executeClick(results,targetParent);
            }else {
                !$('.auto-tips',targetParent).hasClass('hidden') && $('.auto-tips',targetParent).addClass("hidden");
                $('.auto-tips',targetParent).html('');

            }
        });**/

    },
    _renderHTML: function(ret,targetParent) {
        var self = this,
            _config = self.config,
            _cache = self.cache,
            html = '';

        for(var i = 0, ilen = ret.length; i < ilen; i+=1) {
            html += '<p  data-html = "'+ret[i].lastName+'('+ret[i].emplId+')" embId="'+ret[i].emplId+'" class="p-index'+i+'">' +
                       '<img src="'+ret[i].image+'" style="margin-right:5px;" height="25" width="25" title="" alt="">' +
                       '<span>'+ret[i].lastName+'('+ret[i].emplId+')</span>' +
                    '</p>';
        }
        // 渲染值到下拉框里面去
        $('.auto-tips',targetParent).html(html);
         $('.auto-tips',targetParent).hasClass('hidden') && $('.auto-tips',targetParent).removeClass('hidden');
        $('.auto-tips p:last',targetParent).css({"border-bottom":'none'});

        _config.renderHTMLCallback && $.isFunction(_config.renderHTMLCallback) && _config.renderHTMLCallback();

        // 出現(xiàn)滾動條 計算p的長度 * 一項p的高度 是否大于 設(shè)置的高度 如是的話 出現(xiàn)滾動條 反之
        var plen = $('.auto-tips p',targetParent).length,
            pheight = $('.auto-tips p',targetParent).height();

        if(_config.height > 0) {
            if(plen*pheight > _config.height) {
                $('.auto-tips',targetParent).css({'height':_config.height,'overflow':'auto'});
            }else {
                $('.auto-tips',targetParent).css({'height':'auto','overflow':'auto'});
            }
        }
    },
    /**
      * 當(dāng)數(shù)據(jù)相同的時 點擊對應(yīng)的項時 返回數(shù)據(jù)
      */
    _executeClick: function(ret,targetParent) {
        var self = this,
            _config = self.config,
            _cache = self.cache;
         $('.auto-tips p',targetParent).unbind('click');
         $('.auto-tips p',targetParent).bind('click',function(e){
              var dataAttr = $(this).attr('data-html'),
                  embId = $(this).attr('embId');

              // 判斷是否多選
              if(_config.manySelect) {
                  _cache.inputArrs.push(dataAttr);
                  _cache.inputArrs = self._unique(_cache.inputArrs);
                  self._manySelect(targetParent);
              }else {
                 $(_config.targetCls,targetParent).val(dataAttr);
                 var parentCls = $(_config.targetCls,targetParent).closest(_config.parentCls),
                     hiddenCls = $(_config.hiddenCls,parentCls);
                 $(hiddenCls).val(embId);
                 self._createDiv(targetParent,dataAttr);

                 // hover
                 self._hover(targetParent);

                 !$(_config.targetCls,targetParent).hasClass('hidden') && $(_config.targetCls,targetParent).addClass('hidden');
              }
              self._closed(targetParent);
              if(_config.isSelectHide) {
                  !$('.auto-tips',targetParent).hasClass('hidden') && $('.auto-tips',targetParent).addClass('hidden');
              }
              _config.callback && $.isFunction(_config.callback) && _config.callback();
         });

         // 鼠標(biāo)移上效果
         $('.auto-tips p',targetParent).hover(function(e){
             !$(this,targetParent).hasClass(_config.hoverBg) &&
             $(this,targetParent).addClass(_config.hoverBg).siblings().removeClass(_config.hoverBg);
         });
    },
    _hover: function(targetParent){
        $('.create-input span',targetParent).hover(function(){
            $(this).css({"background":'#ccc','padding-left':'0px'});
        },function(){
             $(this).css({"background":''});
        });
    },
    // 動態(tài)的創(chuàng)建div標(biāo)簽 遮住input輸入框
    _createDiv: function(targetParent,dataAttr){
         var self = this,
             _config = self.config;
         var iscreate = $('.create-input',targetParent);

         // 確保只創(chuàng)建一次div
         if(iscreate.length > 0) {
            $('.create-input',targetParent).remove();
         }
         $(targetParent).prepend($('<div class="create-input"><span><i></i></span></div>'));
         $('.create-input span i',targetParent).html(dataAttr);
         $(_config.targetCls,targetParent).val(dataAttr);
         $('.create-input span',targetParent).append('<a class="alink">X</a>');
         $('.alink',targetParent).css({'float':'left','background':'none'});
    },
    // X 關(guān)閉事件
    _closed: function(targetParent){
         var self = this,
             _config = self.config;
         /*
          * 點擊X 關(guān)閉按鈕
          * 判斷當(dāng)前輸入框有沒有up和down屬性 有的話 刪除掉 否則 什么都不做
          */
          $('.alink',targetParent).click(function(){
             $('.create-input',targetParent) && $('.create-input',targetParent).remove();
             $(_config.targetCls,targetParent) && $(_config.targetCls,targetParent).hasClass('hidden') &&
             $(_config.targetCls,targetParent).removeClass('hidden');
             $(_config.targetCls,targetParent).val('');
             //清空隱藏域的值
             var curParent = $(_config.targetCls,targetParent).closest(_config.parentCls);
             $(_config.hiddenCls,curParent).val('');

             var targetInput = $(_config.targetCls,targetParent);
             if($(targetInput).attr('up') || $(targetInput).attr('down')) {
                 $(targetInput).attr('up') && $(targetInput).removeAttr('up');
                 $(targetInput).attr('down') && $(targetInput).removeAttr('down');
             }
             _config.closedCallback && $.isFunction(_config.closedCallback) && _config.closedCallback();
          });
    },
    /*
     * 數(shù)組去重復(fù)
     */
    _unique: function(arrs) {
        var obj = {},
            newArrs = [];
        for(var i = 0, ilen = arrs.length; i < ilen; i++) {
            if(obj[arrs[i]] != 1) {
                newArrs.push(arrs[i]);
                obj[arrs[i]] = 1;
            }
        }
        return newArrs;
    },
    /*
     * 輸入框多選操作
     */
    _manySelect: function(targetParent) {
        var self = this,
            _config = self.config,
            _cache = self.cache;
        if(_cache.inputArrs.length > 0) {
            $(_config.targetCls,targetParent).val(_cache.inputArrs.join(','));
        }
    },
    /*
     * 判斷是否是string
     */
     _isString: function(str) {
        return Object.prototype.toString.apply(str) === '[object String]';
     },
    /*
     * JS 動態(tài)添加css樣式
     */
    _addStyleSheet: function(refWin, cssText, id){

        var self = this;
        if(self._isString(refWin)) {
            id = cssText;
            cssText = refWin;
            refWin = window;
        }
        refWin = $(refWin);
        var doc = document;
        var elem;

        if (id && (id = id.replace('#', ''))) {
            elem = $('#' + id, doc);
        }

        // 僅添加一次,不重復(fù)添加
        if (elem) {
            return;
        }
       //elem = $('<style></style>'); 不能這樣創(chuàng)建 IE8有bug
        elem =  document.createElement("style");
        // 先添加到 DOM 樹中,再給 cssText 賦值,否則 css hack 會失效
        $('head', doc).append(elem);

        if (elem.styleSheet) { // IE
            elem.styleSheet.cssText = cssText;
        } else { // W3C
            elem.appendChild(doc.createTextNode(cssText));
        }
    },
    /*
     * 銷毀操作 釋放內(nèi)存
     */
    destory: function() {
        var self = this,
            _config = self.config,
            _cache = self.cache;
        _cache.ret  = [];
        _cache.currentIndex = 0;
        _cache.oldIndex = 0;
        _cache.inputArrs = [];
        _config.targetCls = null;
    }
 };
 // 初始化
 $(function(){
    var auto = new AutoComplete({
       // url: '/rocky/commonservice/user/find.json'
    });
 });

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