webpack中webpack.config.js中 less的配置方式两种方式的不同?

Question

{test:/\.less$/,loader:"style-loader!css-loader!less-loader",}1上面是loader下面是use他们的区别是啥呢test里面也不一样/.(less|css)$/,和/\.less$/,{test:/\.(less|css)$/,use:['style-loader','css-loader','less-loader'],}