解决IE不支持placeholder

2022-05-14 09:37 218阅读 0赞

一.解决方法

/*
     * jQuery placeholder, fix for IE6,7,8,9
     */
    var JPlaceHolder = {
        //检测
        _check : function(){
            return 'placeholder' in document.createElement('input');
        },
        //初始化
        init : function(){
            if(!this._check()){
                this.fix();
            }
        },
        //修复
        fix : function(){
            jQuery(':input[placeholder]').each(function(index, element) {
    
                var self = $(this), txt = self.attr('placeholder');
                self.wrap($('<div></div>').css({position:'relative', zoom:'1', border:'none', background:'none', padding:'none', margin:'none'}));
                var pos = self.position(), h = self.outerHeight(true), paddingleft = self.css('padding-left');
                var holder="";
                if($(this).val() == ""){
                	holder = $('<span></span>').text(txt).css({position:'absolute', left:pos.left, top:pos.top, height:h, lienHeight:h, paddingLeft:paddingleft, color:'#aaa'}).appendTo(self.parent());
                }else{
                	holder = $('<span></span>').text("").css({position:'absolute', left:pos.left, top:pos.top, height:h, lienHeight:h, paddingLeft:paddingleft, color:'#aaa'}).appendTo(self.parent());
                }
                self.focusin(function(e) {
                    holder.hide();
                }).focusout(function(e) {
                    if(!self.val()){
                        holder.show();
                    }
                });
                holder.click(function(e) {
                    holder.hide();
                    self.focus();
                });
            });
        }
    };
    //执行
    jQuery(function(){
        JPlaceHolder.init();    
    });