A first look at some basic styles of AngularJS_AngularJS
Show and hide
Everything in Angular is based on changes to the model, and these changes are reflected on the interface through identifiers.
ng-show and ng-hide can do the same thing. Showing and hiding are based on the expression you pass to them, that is, when the expression is true, ng-show displays it, otherwise it hides it. When the expression is true, ng-hide is hidden, otherwise it is displayed. These identifiers work by styling the element with display:block to display and display:none to hide it.
CSS classes and styles
Data binding is performed through {{}} parsing, allowing classes and styles to be set dynamically.
ng-class and ng-style
In large projects, the above approach can become unmanageable, so much so that you have to read both templates and JavaScript to create the css correctly.
Angular provides ng-class and ng-style identifiers. Each of them requires an expression. The result of expression execution may be one of the following:
- A string representing a space-delimited class name.
- An array of class names
- A mapping of class names to Boolean values
Selected row
In the template, we set the value of ng-class to {selected:$index==selectedRow}. When the model calls selectedRow, it will match the $index of ng-repeat and display the selected style. Similarly we set up ng-click to notify the controller which row the user clicked.
src and href suggestions
It is recommended to use ng-src and ng-href.
<img ng-src="/img/01.png"> <a ng-href="www.segmentfault.com">segmentfault</a>
All source code
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>angular demo</title>
<script src="http://cdn.bootcss.com/angular.js/1.3.0-beta.8/angular.min.js"></script>
</head>
<body>
<div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController">
<h1>Your demo</h1>
<!-- demo 1 -->
<div ng-show='menuState.show'>another another another</div>
<button ng-click="test2()">切换</button>
<hr><!-- demo 2 -->
<style type="text/css">
.menu-disabled-true{
opacity:1;
color: red;
-webkit-transition:all 1000ms linear;
-moz-transition:all 1000ms linear;
-o-transition:all 1000ms linear;
}
.menu-disabled-false{
opacity: 0;
-webkit-transition:all 1000ms linear;
-moz-transition:all 1000ms linear;
-o-transition:all 1000ms linear;
}
</style>
<div class="menu-disabled-{{isDisabled}}">adfadfadasda</div>
<button ng-click="test()">隐藏</button>
<button ng-click="test1()">显示</button>
<button ng-click="test11()">切换</button>
<hr><!-- demo 3 -->
<style type="text/css">
.error {
background-color: red;
}
.warning {
background-color: yellow;
}
</style>
<div ng-class='{error:isError, warning:isWarning}'>{{messageText}}</div>
<button ng-click="showError()">error</button>
<button ng-click="showWarning()">warning</button>
<hr><!-- demo 4 -->
<style type="text/css">
.selected{
background-color: lightgreen;
}
</style>
<div ng-repeat="item in items" ng-class='{selected:$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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