A custom function in EcmaScript to insert the template literals (variables) in the given template string using tagged template. It is helpful in keeping all the templates separately.

fit-in.js

function fitIn(template, ...values) {
  // console.log(template, values);
  let result = [];
  for (let i = 0; i < template.length; i++) {
    result.push(template[i]);
    if (i < values.length) {
      result.push(values[i]);
    }
  }
  return result.join("");
}

const firstName = "Abhishek",
  lastName = "Kumar";
const result = fitIn`Hello ${firstName} ${lastName}!`;

console.log(result);