ES6 tagged template literal example

uppercase-substitute.ts

import * as _ from 'lodash'

const uppercase = (strings, ...values) => {
  const upper = (input) => _.isString(input) ? input.toUpperCase() : input;

  const zipped = _.zipWith(strings, values, (text, variable) => [text, upper(variable)]);
  const flat = _.flattenDeep(zipped);
  return flat.join('');
}


const user = 'John Doe';
const subscription = 'pro';
const expiry = 'tomorrow';
console.log(uppercase`Hi, ${user}, you have ${subscription} package until ${expiry}.`);
// Hi, JOHN DOE, you have PRO package until TOMORROW.