input框处理删除小图标的功能

/**
     * 搜索中的删除小图标功能与按backspace键删内容时事件,用于清空搜索框内的文字;
     * inputId:表单ID名称      如:searchKeys
     */
    _clearSearchInput: function (inputId) {
        if (typeof inputId != "string") {
            return;
        }
        //input焦点
        var input_Focus = $("#" + inputId);
        //console.log(input_Focus);

        var closeIcon = input_Focus.parent().next(".clear_icon");
        var input_timer;

        //搜索框处理;
        input_Focus.bind("blur", function (e) {
            if (input_timer) {
                clearInterval(input_timer);
            }
        }).bind("focus",function (e) {
                //alert("a");
                var that = this;
                input_timer = setInterval(function () {
                    if (that.value == "") {
                        closeIcon.hide();
                    }else{
                        closeIcon.show();
                    }
                }, 200);
            }).bind("keydown", function (e) {
                e = e || window.event;
                if (e.keyCode == 8) {
                    if (this.value == "") {
                        closeIcon.hide();
                    }
                } else {
                    if(this.value == ""){
                        closeIcon.hide();
                    }else{
                        closeIcon.show();
                    }

                }

        }).bind("change", function (e) {
            if ($.trim(input_Focus.val()).length > 0) {
                closeIcon.show();
            }
        });


        //小图标处理;
        closeIcon.bind('tap', function (e) {
            input_Focus.focus().select(0, 0);
            input_Focus.val("");
            $(this).hide();
        });

//        if($.trim(input_Focus.val()).length>0){
//            closeIcon.show();
//        }
    },
原文地址:https://www.cnblogs.com/lcx90/p/4453410.html