Show and Hide
Everything in the angular is based on the changes in the model, which in turn reflect these changes to the interface through identifiers.
Ng-show and Ng-hide can do the same thing. Display and hide are based on the expression you pass to them, that is, when the expression is true, the ng-show is displayed, otherwise it is hidden. When the expression is true, the ng-hide is hidden and otherwise displayed. These identifiers work by setting the style of the element display:block display and Display:none hidden.
CSS classes and styles
Data binding through {}} parsing, which enables you to set classes and styles dynamically.
Ng-class and Ng-style
In large projects, the above approach makes it difficult to manage so that you have to read templates and JavaScript at the same time to create CSS correctly.
Angular provides the ng-class and Ng-style identifiers. Each of them needs an expression. The result of an expression execution may be one of the following:
The selected row
In the template, we set the Ng-class value to {selected: $index ==selectedrow}, which matches the Ng-repeat $index when the model calls Selectedrow, and then displays the selected style. Again, we set up Ng-click to inform the controller which line the user has ordered.
src and href suggestions
It is recommended to use NG-SRC and ng-href.
<img ng-src="/img/01.png"> <a ng-href="www.segmentfault.com">segmentfault</a>
All source
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>angular demo</title>
<script src="http://cdn.bootcss.com/angular.js/1.3.0-beta.8/angular.min.js"></script>
</head>
<body>
<div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController">
<h1>Your demo</h1>
<!-- demo 1 -->
<div ng-show='menuState.show'>another another another</div>
<button ng-click="test2()">切换</button>
<hr><!-- demo 2 -->
<style type="text/css">
.menu-disabled-true{
opacity:1;
color: red;
-webkit-transition:all 1000ms linear;
-moz-transition:all 1000ms linear;
-o-transition:all 1000ms linear;
}
.menu-disabled-false{
opacity: 0;
-webkit-transition:all 1000ms linear;
-moz-transition:all 1000ms linear;
-o-transition:all 1000ms linear;
}
</style>
<div class="menu-disabled-{{isDisabled}}">adfadfadasda</div>
<button ng-click="test()">隐藏</button>
<button ng-click="test1()">显示</button>
<button ng-click="test11()">切换</button>
<hr><!-- demo 3 -->
<style type="text/css">
.error {
background-color: red;
}
.warning {
background-color: yellow;
}
</style>
<div ng-class='{error:isError, warning:isWarning}'>{{messageText}}</div>
<button ng-click="showError()">error</button>
<button ng-click="showWarning()">warning</button>
<hr><!-- demo 4 -->
<style type="text/css">
.selected{
background-color: lightgreen;
}
</style>
<div ng-repeat="item in items" ng-class='{selected:$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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