按钮不会更改背景和文本的颜色

Question

I'm apparently doing something wrong with this code. Not sure what but its going really wrong.

I'm wanting it so that when you click a button the colour the background and the text changes font, Currently not happening

<style>
.red { background-color: red; }
.red p { font-style: normal; }

.blue { background-color: blue; }
.blue p { font-style: italic; }

.green { background-color: green; }
.green p { font-style: oblique;}
</style>
<div ng-class={{colorScheme}}>

    <button ng-click="colorScheme = 'red'">ColorScheme Red</button>
    <button ng-click="colorScheme = 'blue'">ColorScheme Blue</button>
    <button ng-click="colorScheme = 'green'">ColorScheme Green</button>

    <p>Awesome content</p>

</div>

Answer 1

Just pass the scope variable to ng-class like

 var app = angular.module('my-app', [], function() {}) app.controller('AppController', function($scope) {}) 

 .red { background-color: red; } .red p { font-style: normal; } .blue { background-color: blue; } .blue p { font-style: italic; } .green { background-color: green; } .green p { font-style: oblique; } 

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="my-app" ng-controller="AppController"> <div ng-class="colorScheme"> <button ng-click="colorScheme = 'red'">ColorScheme Red</button> <button ng-click="colorScheme = 'blue'">ColorScheme Blue</button> <button ng-click="colorScheme = 'green'">ColorScheme Green</button> <p>Awesome content</p> </div> </div> 

Answer 2

If you use ng-class don't put expressions{{}} just use directly the scope object. Because its default directive in angular they didn't expect the expressions {{}}

Otherwise Use class with expression in the way of I am answered

<div class="{{colorScheme}}">

    <button ng-click="colorScheme = 'red'">ColorScheme Red</button>
    <button ng-click="colorScheme = 'blue'">ColorScheme Blue</button>
    <button ng-click="colorScheme = 'green'">ColorScheme Green</button>

    <p>Awesome content</p>

</div>

Answer 3

Since you also tagged JQuery... this works for me:

$("button").click(function(){
    $(this).parent().removeClass().addClass($(this).attr('color'));
});

Here is the JSFiddle demo :)