controller.js

const svgconfig = require("./svg.config");
const svgo = new SVGO(svgconfig);

svg.config.js

module.exports.svgconfig = {
  plugins: [
    {
      cleanupAttrs: true
    },
    {
      removeDoctype: true
    },
    {
      removeXMLProcInst: true
    },
    {
      removeComments: true
    },
    {
      removeMetadata: true
    },
    {
      removeTitle: true
    },
    {
      removeDesc: true
    },
    {
      removeUselessDefs: true
    },
    {
      removeEditorsNSData: true
    },
    {
      removeEmptyAttrs: true
    },
    {
      removeHiddenElems: true
    },
    {
      removeEmptyText: true
    },
    {
      removeEmptyContainers: true
    },
    {
      removeViewBox: false
    },
    {
      convertStyleToAttrs: true
    },
    {
      convertColors: true
    },
    {
      convertTransform: true
    },
    {
      removeUnknownsAndDefaults: true
    },
    {
      removeNonInheritableGroupAttrs: true
    },
    {
      removeUselessStrokeAndFill: true
    },
    {
      removeUnusedNS: true
    },
    {
      cleanupIDs: true
    },
    {
      cleanupNumericValues: true
    },
    {
      sortAttrs: true
    },
    {
      removeAttrs: { attrs: "(stroke|fill)" }
    }
  ]
};