我正试图在我的ionic3项目中遵循angular的逐个功能结构。所以我在app文件夹下创建了一个功能文件夹，如下所示：
- src/
- app/
- about/
- about.module.ts
- components／
- about.component.html
- about.component.ts
- about.component.scss
更改about文件夹下的任何文件时，ionic serve会触发重建过程，但构建的文件不会改变任何内容：
> ionic-app-scripts serve
[10:50:52] ionic-app-scripts 2.1.3
[10:50:52] watch started ...
[10:50:52] build dev started ...
[10:50:52] clean started ...
[10:50:52] clean finished in 3 ms
[10:50:52] copy started ...
[10:50:52] transpile started ...
[10:50:57] transpile finished in 4.74 s
[10:50:57] preprocess started ...
[10:50:57] deeplinks started ...
[10:50:57] deeplinks finished in 181 ms
[10:50:57] preprocess finished in 183 ms
[10:50:57] webpack started ...
[10:50:57] copy finished in 5.14 s
[10:51:08] webpack finished in 10.82 s
[10:51:08] sass started ...
[10:51:10] sass finished in 2.06 s
[10:51:10] postprocess started ...
[10:51:10] postprocess finished in 5 ms
[10:51:10] lint started ...
[10:51:10] build dev finished in 17.86 s
[10:51:10] watch ready in 17.95 s
[10:51:10] dev server running: http://localhost:8100/
// -----> change any files under about folder
[10:51:16] lint finished in 5.90 s
[10:52:51] build started ...
[10:52:51] template update started ...
[10:52:51] template update finished in 5 ms
[10:52:51] deeplinks update started ...
[10:52:53] deeplinks update finished in 1.59 s
[10:52:53] build finished in 1.60 s
目前，我必须在每次更改时重新运行ionic serve。
如何使这项工作？