How grunt watch files in sub folders?

Question

My code folders and files are like this, you never know how many sub folders in it: ``` js/sub1/a.js js/sub2/b.js js/sub3/sub31/c.js js/sub4/sub41/sub411/d.js ``` Here is part of the Gruntfile.js: ``` grunt.initConfig({ watch: { src: { files: ['js/*.js'], tasks: [] } } }); ``` Grunt can't watch the changes of my all JavaScript files by using `'js/*.js'`. So how to write the correct file path expression?

Accepted Answer

Per the official documentation on file globbing, to watch for changes for files of a certain file type in the directory path and its subdirectories, you'll want:

```
files: ['js/**/*.js']
```

How grunt watch files in sub folders?

Solution

Problem