A first look at some basic styles of AngularJS

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A first look at some basic styles of AngularJS_AngularJS

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May 16, 2016 pm 03:48 PM

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  src="/static/imghwm/default1.png"  data-src="/img/01.png"  class="lazy"  ng- alt="A first look at some basic styles of AngularJS_AngularJS" >
<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 id="Your-demo">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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