How grunt watch files in sub folders?

Question

My codes folders and files 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?

Answer 1

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']