你可以使用 ng-class

<span ng-class="{red: past == 'yes', black: past == 'no'}">{{somedue.date}}</span>

将应用红色或黑色类的位置.您可以通过 CSS 设置样式，使颜色变为红色/黑色.

where the classes red or black will be applied. You can style those via CSS to make the color red / black.

示例:http://jsfiddle.net/TheSharpieOne/NHS73/

您的示例中的数据结构很奇怪，我的示例中已对其进行了修改以展示 ng-class.

Your data structure was odd in your example, it has been modified in mine to showcase ng-class.

另外:您可以使用 true/false 而不需要对 'yes'/'no 进行字符串比较'.

Also: You could use true / false and not need to do a string comparison to 'yes'/'no'.