打开 .coffee 文件，然后转到 视图 - >语法 - >打开所有与当前扩展名为... - > CoffeeScript 。现在，任何时候打开CoffeeScript文件都应该具有正确的语法高亮。

Open a .coffee file, then go to View -> Syntax -> Open all with current extension as... -> CoffeeScript. Now, any time you open a CoffeeScript file it should have the correct syntax highlighting.