安裝

shell> npm install -g js-beautify

shell> js-beautify foo.js
shell> js-beautify -s 2 foo.js # indent-size
shell> js-beautify -b collapse-preserve-inline foo.js 
shell> js-beautify -o foo.js foo.js

shell> js-beautify -s 2 --type html

shell> js-beautify -s 2 -b collapse-preserve-inline foo.js

參考網站：

• js-beautify