How to Use Tagged Literals and Booleans in Object-Oriented JavaScript?

Estimated read time 1 min read

Here’s how to use tagged literals and booleans in object-oriented JavaScript:

  1. Tagged Literals: Tagged literals are special function calls that are executed when a template literal is used.


// Define a tagged literal function
function currency(strings, ...values) {
  let result = "";
  for (let i = 0; i < strings.length; i++) {
    result += strings[i];
    if (i < values.length) {
      result += `$${values[i].toFixed(2)}`;
  return result;

// Use the tagged literal
let price = 19.99;
let message = currency`The price is ${price}.`;
  1. Booleans: Booleans are a data type in JavaScript that have only two values: true or false.


let isValid = true;
if (isValid) {
  console.log("The input is valid.");
} else {
  console.log("The input is invalid.");

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