SoFunction
Updated on 2025-03-06

JS input box mailbox automatic prompt function code implementation


/**
* Email automatic prompt plug-in
 * @constructor EmailAutoComplete
* @ options {object} configurable items
 */

 function EmailAutoComplete(options) {

    = {
targetCls       :  '.inputElem',        // Target input element
parentCls        :  '.parentCls',         // Parent class of the current input element
hiddenCls         :  '.hiddenCls',        // Current input hidden domain
searchForm      :  '.jqtransformdone', //form form
hoverBg           :  'hoverBg',                                                                                                                                                                                                                                             �
inputValColor  :  'red',                                                                                                                       �
mailArr          : ["@","@","@","@","@","@","@","@","@","@","@","@","@","@","@","@"], //Email Array
isSelectHide   : true,                                                                                                                        �
callback                                                              �
    };
    = {
onlyFlag                  : true,     // Only render once
        currentIndex        : -1,
        oldIndex            : -1
    };

    (options);
 }

= {

    constructor: EmailAutoComplete,

    init: function(options){
        = $.extend(,options || {});

        var self = this,
            _config = ,
            _cache = ;

        $(_config.targetCls).each(function(index,item){

            $(item).keyup(function(e){
                var target = ,
                    targetVal = $.trim($(this).val()),
                    keycode = ,
                    elemHeight = $(this).outerHeight(),
                    elemWidth = $(this).outerWidth(),
                    parentNode = $(this).closest(_config.parentCls);

                $(parentNode).css({'position':'relative'});
// If the input box value is empty, the drop-down box is hidden
                if(targetVal == '') {
                    $(item).attr({'data-html':''});
// Assign values ​​to the hidden domain
                    $(_config.hiddenCls,parentNode).val('');

                    _cache.currentIndex = -1;
                    _cache.oldIndex = -1;
                    $(".auto-tip",parentNode) && !$(".auto-tip",parentNode).hasClass('hidden') && $(".auto-tip",parentNode).addClass('hidden');
                    self._removeBg(parentNode);
                }else {

                    $(item).attr({'data-html':targetVal});

// Assign values ​​to the hidden domain
                    $(_config.hiddenCls,parentNode).val(targetVal);

                    $(".auto-tip",parentNode) && $(".auto-tip",parentNode).hasClass('hidden') && $(".auto-tip",parentNode).removeClass('hidden');
// Render the content of the drop-down box
                    self._renderHTML({keycode:keycode,e:e,target:target,targetVal:targetVal,height:elemHeight,width:elemWidth,parentNode:parentNode});
                }

               
            });
        });

// Block form form default enter key submission
       $(_config.searchForm).each(function(index,item) {
            $(item).keydown(function(e){
                 var keyCode = ;
                 if(keyCode == 13) {
                     return false;
                 }
            });
       });

// When clicking on the document document, the drop-down box is hidden
       $(document).click(function(e){
          ();
          var target = ,
              tagCls = _config.(/^\./,'');

          if(!$(target).hasClass(tagCls)) {
             $('.auto-tip') && $('.auto-tip').each(function(index,item){
                 !$(item).hasClass('hidden') && $(item).addClass('hidden');
             });
          }
       });
    },
    /*
* Rendering drop-down box prompt content
     * @param cfg{object}
     */
    _renderHTML: function(cfg) {
        var self = this,
            _config = ,
            _cache = ,
            curVal;
        var curIndex = self._keyCode();

        $('.auto-tip',).hasClass('hidden') && $('.auto-tip',).removeClass('hidden');
        if(curIndex > -1){
// Keyboard up and down operation
            self._keyUpAndDown(,,);
        }else {
            if(/@/.test()) {
                curVal = (/@.*/,'');
            }else {
                curVal = ;
            }
            if(_cache.onlyFlag) {
                $().append('<input type="hidden" class="hiddenCls"/>');
                var wrap = '<ul class="auto-tip">';

                for(var i = 0; i < _config.; i++) {

                    wrap += '<li class="p-index'+i+'">'+'<span class="output-num"></span><em class="em" data-html="'+_config.mailArr[i]+'">'+_config.mailArr[i]+'</em></li>';
                }
                wrap += '</ul>';
                _cache.onlyFlag = false;
                $().append(wrap);
                $('.auto-tip',).css({'position':'absolute','top':,'width': - 2 + 'px','left':0,
                    'border':'1px solid #ccc','z-index':10000});
            }

// Add attributes to all li data-html
            $('.auto-tip li',).each(function(index,item){
                $('.output-num',item).html(curVal);
                !$('.output-num',item).hasClass(_config.inputValColor) &&
                $('.output-num',item).addClass(_config.inputValColor);
                var emVal = $.trim($('.em',item).attr('data-html'));
                $(item).attr({'data-html':curVal + '' +emVal});
            });

// Accurately match content
            self._accurateMate({target:,parentNode:});

// When the mouse moves to a certain li
            self._itemHover();

// When clicking on the corresponding item
            self._executeClick();
        }

    },
    /**
* Exactly match a certain item
     */
    _accurateMate: function(cfg) {
        var self = this,
            _config = ,
            _cache = ;

        var curVal = $.trim($(,).attr('data-html')),
            newArrs = [];
        if(/@/.test(curVal)) {

// Get the value before @
            var prefix = (/@.*/, ""),
                suffix = (/.*@/, "");

            $.map(_config.mailArr,function(n){
                var reg = new RegExp(suffix);
                if((n)) {
                    (n);
                }
            });
            if( > 0) {
                $('.auto-tip',).html('');
                $(".auto-tip",) && $(".auto-tip",).hasClass('hidden') &&
                $(".auto-tip",).removeClass('hidden');

                var html = '';
                for(var j = 0, jlen = ; j < jlen; j++) {
                    html += '<li class="p-index'+j+'">'+'<span class="output-num"></span><em class="em" data-html="'+newArrs[j]+'">'+newArrs[j]+'</em></li>';
                }
                $('.auto-tip',).html(html);

// Add attributes to all li data-html
                $('.auto-tip li',).each(function(index,item){
                    $('.output-num',item).html(prefix);
                    !$('.output-num',item).hasClass(_config.inputValColor) &&
                    $('.output-num',item).addClass(_config.inputValColor);

                    var emVal = $.trim($('.em',item).attr('data-html'));

                    $(item).attr('data-html','');
                    $(item).attr({'data-html':prefix + '' +emVal});
                });

// When matching to an item exactly, make the current index equal to the initial value
                _cache.currentIndex = -1;
                _cache.oldIndex = -1;

                $('.auto-tip .output-num',).html(prefix);

// When the mouse moves to a certain li
                self._itemHover();

// When clicking on the corresponding item
                self._executeClick();
            }else {
                $(".auto-tip",) && !$(".auto-tip",).hasClass('hidden') &&
                $(".auto-tip",).addClass('hidden');
                $('.auto-tip',).html('');
            }
        }
    },
    /*
* When the mouse is moved to a certain li
     */
    _itemHover: function(parentNode) {
        var self = this,
            _config = ,
            _cache = ;
        $('.auto-tip li',parentNode).hover(function(index,item) {
            !$(this).hasClass(_config.hoverBg) && $(this).addClass(_config.hoverBg);
        },function() {
            $(this).hasClass(_config.hoverBg) && $(this).removeClass(_config.hoverBg);
        });
    },
    /*
* When the input box value is empty, delete all li items. class hoverBg
     */
    _removeBg: function(parentNode){
        var self = this,
            _config = ;

        $(".auto-tip li",parentNode).each(function(index,item){
            $(item).hasClass(_config.hoverBg) && $(item).removeClass(_config.hoverBg);
        });   
    },
    /**
* Keyboard up and down key operations
     */
     _keyUpAndDown: function(targetVal,e,parentNode) {
        var self = this,
            _cache = ,
            _config = ;

// If the request is successful, data is returned (judged based on the length of the element) Perform the following operations
        if($('.auto-tip' + ' li',parentNode) && $('.auto-tip' + ' li').length > 0) {

            var plen = $('.auto-tip' + ' li',parentNode).length,
                keyCode = ;
                _cache.oldIndex = _cache.currentIndex;
           

// Move up operation
            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-tip .p-index'+_cache.currentIndex,parentNode).hasClass(_config.hoverBg) &&
                    $('.auto-tip .p-index'+_cache.currentIndex,parentNode).addClass(_config.hoverBg).siblings().removeClass(_config.hoverBg);

                    var curAttr = $('.auto-tip' + ' .p-index'+_cache.currentIndex,parentNode).attr('data-html');
                    $(_config.targetCls,parentNode).val(curAttr);

// Assign values ​​to the hidden domain
                    $(_config.hiddenCls,parentNode).val(curAttr);
                }

}else if(keyCode == 40) { //Move down operation
                if(_cache.currentIndex == plen - 1) {
                    _cache.currentIndex = 0;
                }else {
                    _cache.currentIndex++;
                    if(_cache.currentIndex > plen - 1) {
                        _cache.currentIndex = 0;
                    }
                }

                if(_cache.currentIndex !== -1) {

                    !$('.auto-tip .p-index'+_cache.currentIndex,parentNode).hasClass(_config.hoverBg) &&
                    $('.auto-tip .p-index'+_cache.currentIndex,parentNode).addClass(_config.hoverBg).siblings().removeClass(_config.hoverBg);

                    var curAttr = $('.auto-tip' + ' .p-index'+_cache.currentIndex,parentNode).attr('data-html');
                    $(_config.targetCls,parentNode).val(curAttr);
// Assign values ​​to the hidden domain
                    $(_config.hiddenCls,parentNode).val(curAttr);
                }

}else if(keyCode == 13) { //Enter operation
                var curVal = $('.auto-tip' + ' .p-index'+_cache.oldIndex,parentNode).attr('data-html');
                $(_config.targetCls,parentNode).val(curVal);

// Assign values ​​to the hidden domain
                $(_config.hiddenCls,parentNode).val(curVal);

                if(_config.isSelectHide) {
                     !$(".auto-tip",parentNode).hasClass('hidden') && $(".auto-tip",parentNode).addClass('hidden');
                 }
                 _config.callback && $.isFunction(_config.callback) && _config.callback();

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

            }
        }
     },
     _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 = ; i < ilen; i++) {
             if(code == arrs[i]) {
                 return i;
             }
         }
         return -1;
     },
    /**
* When the data is the same, when the corresponding item is clicked, return the data
      */
     _executeClick: function(parentNode) {

         var _self = this,
             _config = _self.config;

         $('.auto-tip' + ' li',parentNode).unbind('click');
         $('.auto-tip' + ' li',parentNode).bind('click',function(e){
              var dataAttr = $(this).attr('data-html');

              $(_config.targetCls,parentNode).val(dataAttr);
              if(_config.isSelectHide) {
                  !$(".auto-tip",parentNode).hasClass('hidden') && $(".auto-tip",parentNode).addClass('hidden');
              }
// Assign value to the hidden domain
              $(_config.hiddenCls,parentNode).val(dataAttr);
              _config.callback && $.isFunction(_config.callback) && _config.callback();

         });
     }
};

// Initialization
$(function() {
    new EmailAutoComplete({});
});