顯示和隱藏
在 Angular 中的一切，都是基於模型的改變，進而通過標識符反映這些變化到介面上。
ng-show 和 ng-hide 可以做相同的事情。顯示和隱藏是基於你傳遞給他們的運算式而定，即，當運算式為 true 時，ng-show 就顯示，反之隱藏。當運算式為 true 時，ng-hide 就隱藏，反之顯示。這些標識符是通過設定元素的樣式 display:block 顯示和 display:none 隱藏進行工作的。
CSS類和樣式
通過 {{}} 解析來進行資料繫結，從而能夠動態地設定類和樣式。
ng-class 和 ng-style
在大型項目中，上面的方式會使得難以管理，以至於不得不同時閱讀模版和 JavaScript 才能正確地建立 css 。
Angular 提供了 ng-class 和 ng-style 標識符。他們每一個都需要一個運算式。運算式執行的結果可能是下列之一：
選中的行
模版中，我們設定 ng-class 的值為 {selected:$index==selectedRow}，當模型調用selectedRow 時將匹配 ng-repeat 的 $index，進而顯示選中的樣式。同樣我們設定 ng-click 來通知控制器使用者點了哪一行。
src 和 href 建議
建議使用 ng-src 和 ng-href。
<img ng-src="/img/01.png"><a ng-href="www.segmentfault.com">segmentfault</a>
所有源碼
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>angular demo</title> <script src="http://cdn.bootcss.com/angular.js/1.3.0-beta.8/angular.min.js"></script></head><body> <div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController"> <h1>Your demo</h1> <!-- demo 1 --> <div ng-show='menuState.show'>another another another</div> <button ng-click="test2()">切換</button> <hr><!-- demo 2 --> <style type="text/css"> .menu-disabled-true{ opacity:1; color: red; -webkit-transition:all 1000ms linear; -moz-transition:all 1000ms linear; -o-transition:all 1000ms linear; } .menu-disabled-false{ opacity: 0; -webkit-transition:all 1000ms linear; -moz-transition:all 1000ms linear; -o-transition:all 1000ms linear; } </style> <div class="menu-disabled-{{isDisabled}}">adfadfadasda</div> <button ng-click="test()">隱藏</button> <button ng-click="test1()">顯示</button> <button ng-click="test11()">切換</button> <hr><!-- demo 3 --> <style type="text/css"> .error { background-color: red; } .warning { background-color: yellow; } </style> <div ng-class='{error:isError, warning:isWarning}'>{{messageText}}</div> <button ng-click="showError()">error</button> <button ng-click="showWarning()">warning</button> <hr><!-- demo 4 --> <style type="text/css"> .selected{ background-color: lightgreen; } </style> <div ng-repeat="item in items" ng-class='{selected:$index==selectedRow}' ng-click='selectedWhich($index)'> <span>{{item.product_name}}</span> <span>{{item.price | currency}}</span> </div> </div> <script> var shoppingCartModule = angular.module("shoppingCart", []) shoppingCartModule.controller("ShoppingCartController", function ($scope) { // demo 1 $scope.menuState = {'show':true}; $scope.test2 = function () { $scope.menuState.show = !$scope.menuState.show; }; // demo 2 $scope.isDisabled = true; $scope.test = function () { $scope.isDisabled = 'false'; }; $scope.test1 = function () { $scope.isDisabled = 'true'; }; $scope.test11 = function () { $scope.isDisabled = !$scope.isDisabled; }; // demo 3 $scope.isError = false; $scope.isWarning = false; $scope.messageText = 'default, default'; $scope.showError = function () { $scope.messageText = 'This is an error'; $scope.isError = true; $scope.isWarning = false; }; $scope.showWarning = function () { $scope.messageText = 'Just a warning, donot warry'; $scope.isWarning = true; $scope.isError = false; }; // demo 4 $scope.items = [ { product_name: "Product 1", price: 50 }, { product_name: "Product 2", price: 20 }, { product_name: "Product 3", price: 180 } ]; $scope.selectedWhich = function (row) { $scope.selectedRow = row; } } ); </script></body></html>
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