预建主题不起作用。我将此添加到我的 styles.css
@import "~@angular/material/prebuilt-themes/deeppurple-amber.css";
还尝试将其添加到 index.html
<link href="node_modules/@angular/material/prebuilt-themes/indigo-pink.css" rel="stylesheet">
但我在浏览器中收到此错误：
Refused to apply style from 'http://localhost:4200/node_modules/@angular/material/prebuilt-themes/indigo-pink.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.
我正在使用 Angular 12。