how to run scss in npm code example

Example 1: node-sass run

npm install node-sass
node-sass ./styles.scss -o ./styles.css

Example 2: scss npm

var sass = require('node-sass');
sass.render({
  file: scss_filename,
  [, options..]
}, function(err, result) { /*...*/ });
// OR
var result = sass.renderSync({
  data: scss_content
  [, options..]
});