npm  -g  install  less

{
"autoCompile": true,
"createCssSourceMaps": false,
"ignorePrefixedFiles": false,
"lessBaseDir": "./",
"lesscCommand": false,
"main_file": false,
"minify": false,
"minName": false,
"outputDir": "./",
"outputFile": "", //[example.css] if left blank uses same name of .less file
"showErrorWithWindow": true,
"autoprefix": false,
"disableVerbose":false,
"silent":false
}