sass bootstrap4未应用于我的html文件

sass bootstrap4未应用于我的html文件,sass,bootstrap-4,scss-mixins,Sass,Bootstrap 4,Scss Mixins,我是sass的新手,我有一个html文件,我已经应用了sass <!DOCTYPE HTML> <html> <head> <meta charset="UTF-8"> <link href="sass/app.scss" rel="stylesheet" > </head> <body> hhhhhhhhhhhhhhhhhhhhhhhhhhllllllllllllll </body> </h

我是sass的新手,我有一个html文件,我已经应用了sass

<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<link href="sass/app.scss" rel="stylesheet" >
 </head>
<body>
hhhhhhhhhhhhhhhhhhhhhhhhhhllllllllllllll
</body>
</html>
这些正文scss不会应用于html文件。如有任何帮助,将不胜感激。

app.scss

$primary: #3498db;
 $secondary: #e67e22;
$success: #2eeeff;
$danger: #e74c3c;

@import "../node_modules/bootstrap/scss/bootstrap.scss";

 /*# sourceMappingURL=styles.css.map */
html


SASS未在浏览器中解析。您必须首先将SASS编译为CSS。请看:@Zim,你能注意一下吗
$primary: #3498db;
 $secondary: #e67e22;
$success: #2eeeff;
$danger: #e74c3c;

@import "../node_modules/bootstrap/scss/bootstrap.scss";

 /*# sourceMappingURL=styles.css.map */
 <link href="scss/app.css" rel="stylesheet" />