Javascript ngClass 不工作？
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ngClass not working?
提问by Rohan
I am new to AngularJS and I understand that the ngClass directive can be used to insert classes dynamically into elements like:
我是 AngularJS 的新手，我知道 ngClass 指令可用于将类动态插入到元素中，例如：
<input ng-class="{some-class: condition, another-class: anotherCondition}">
And angular will automatically evaluate which conditions are true and will insert those particular classes in the element.
angular 会自动评估哪些条件为真，并将这些特定的类插入到元素中。
Now I am trying to do something like:
现在我正在尝试做类似的事情：
<div class="form-group" ng-class="{has-success: form.email.$valid}">
Since I have bootstrap, it will automatically color the label and the input green if the email is valid. But it doesn't work and I am getting this particular error in the console:
由于我有引导程序，如果电子邮件有效，它会自动将标签和输入着色为绿色。但它不起作用，我在控制台中收到此特定错误：
Error: [$parse:syntax] http://errors.angularjs.org/1.2.27/$parse/syntax?p0=-&p1=is%20unexpected%2C%20expecting%20%5B%3A%5D&p2=5&p3=%7Bhas-success%3A%20form.email.%24valid%7D&p4=-success%3A%20form.email.%24valid%7D
z/<@http://ajax.googleapis.com/ajax/libs/angularjs/1.2.27/angular.min.js:6:450
and so on....
等等....
What am I doing wrong? Is it a syntax issue?
我究竟做错了什么？是语法问题吗？
回答by tymeJV
Theres a dash in your class name, so use single quotes!
你的类名中有一个破折号，所以使用单引号！
ng-class="{'has-success': form.email.$valid}"
回答by PSL
It is clearly a parser error, you have invalid syntax due to the presence of -in the property name @ {has-success: form.email.$valid}. You would need to wrap them in quotes.
这显然是一个解析器错误，由于-属性名称 @ 中的存在，您的语法无效{has-success: form.email.$valid}。您需要将它们用引号括起来。
Try:-
尝试：-
<div class="form-group" ng-class="{'has-success': form.email.$valid}">
回答by Sashini Hettiarachchi
If you use '-' in the class name you should cover the class name using single quotes.
如果在类名中使用“-”，则应使用单引号将类名括起来。
[ngClass] = "{'some-class': condition}"
otherwise can be use
否则可以使用
[ngClass] = "{someClass : condition}"
回答by Zohab Ali
This worked for me
这对我有用
[ngClass] = "{ 'color-red': isRed}"
