//用法<input placeholder="" ng-model=''>
.directive('placeholder', function () {return {restrict: 'A',require: '?^ngModel',link: function (scope, element, attr) {alert(110)var scope = scope && scope.$new();var validateClass = attr['validateClass'];if ('placeholder' in document.createElement('input')) {return;}var _class = element.attr('class');var _id = element.attr('id');var _style = element.attr('style');var elName = element[0].tagName;var tip;var copyElement, classFlag;element.attr('placeholder', '');function load() {if (elName === 'INPUT') {classFlag = 'copy' + Math.floor(Math.random() * 1000000);element.after("<input class='copy " + classFlag + " " + validateClass + " " + _class + "' id='" + _id + "' style='color:#999;" + _style + "' value='" + tip + "' />");copyElement = $("." + classFlag);scope.init();} else if (elName === 'TEXTAREA') {classFlag = 'copy' + Math.floor(Math.random() * 1000000);element.after("<textarea rows=" + attr.rows + " class='copy " + classFlag + " " + _class + "' id='" + _id + "' style='color:#999;" + _style + "' /></textarea>");copyElement = $("." + classFlag);copyElement.val(tip);//指令兼容活动页面,此处select无法监听if (CommonFun.getUrlPara() === 'create') {if (scope.ngModel && (scope.ngModel.type === '单行文本' || scope.ngModel.type === '多行文本')) {element.hide();copyElement.hide();}$('select').change(function () {if ($(this).val() === 0 || $(this).val() === 1) {// element.hide();copyElement.hide();} else {copyElement.show();element.hide();copyElement.focus(function () {copyElement.hide();element.show();element.trigger('focus');});element.blur(function () {if (element.val() === "") {copyElement.show();element.hide();}});}});} else {scope.init();}}}//指令兼容活动页面if (scope.ngModel && scope.ngModel.tip !== undefined && scope.ngModel.tip !== null && scope.ngModel.tip !== '' && CommonFun.getUrlPara() !== 'create') {tip = scope.ngModel.tip;} else if (scope.ngModel && scope.ngModel.tip === '') {tip = '';} else {attr.$observe('placeholder', function (newV) {tip = newV;load();});}scope.init = function () {copyElement.show();element.hide();//监听input值状态scope.$watch(function () { return element.val(); }, function (newV) {if (newV !== null && newV !== undefined && newV.trim() !== "") {copyElement.hide();element.show();} else {copyElement.show();element.hide();}});copyElement && copyElement.focus(function () {copyElement.hide();element.show();element.trigger('focus');});element.blur(function () {if (element.val() === "") {copyElement.show();element.hide();}});};}};
})