How to convert multiline vars into separate let/const declarations

Readme.md

You can convert js-code like this:

var a = '1',
    b,
    c = '2';

into

const a = '1';
let b;
const c = '2';

just install npm-package jscodeshift and run:
jscodeshift -t transform.js <file_to_transform>

transform.js

module.exports = function(fileInfo, api, options) {
  const j = api.jscodeshift;
  return j(fileInfo.source)
    .find(j.VariableDeclaration)
    .replaceWith(path => {
      return path.value.declarations.map(declaration => {
        let var_dec;
        if (path.value.kind === 'var') {
          var_dec = declaration.init ? 'const' : 'let';
        } else {
          var_dec = path.value.kind;
        }
        return j.variableDeclaration(var_dec, [declaration]);
      });
    })
    .toSource();
};