String Formatter Javascript OR JavaScript String Format Or Interpolation

string formatter javascript is the process of inserting variables into a string. Using {} brackets within backticks “, Using + operator and By creating a format function.

string formatter javascript

Contents

js format string

Simple String.format() in javascript

String.prototype.format = function() {
  a = this;
  for (k in arguments) {
    a = a.replace("{" + k + "}", arguments[k])
  }
  return a
}

Usage of js format string

console.log("Welcome, {0}!".format("Pakainfo"))

1. Format String Using Backticks

javascript format string

let name = "Rakesh";
let age = 30;
let lunch = "dabeli";

// String formating using backticks
let data_content = `${name} is ${age} years old and favourites ${lunch}`;

console.log(data_content); // Rakesh is 30 years old and favourites dabeli

Format String Using Plus Operator

let name = "Rakesh";
let age = 30;
let lunch = "dabeli";

// String formating using plus operator
let data_content = name + ' is ' + age + ' years old and favourites ' + lunch;

console.log(data_content); // Rakesh is 30 years old and favourites dabeli

Don’t Miss : Javascript Converting Strings To Number Example

Javascript String Format Example

Example: Assign value

// assigning value
var ranks = 65;
var status = `Rakesh => ${ranks >= 60 ? "Pass" : "Fail"}`;
console.log(status); // Rakesh => Pass

Example: JavaScript expression

// JavaScript expression
var numbers = [13, 2, 32, 54, 5];
var biggest = `The biggest number is ${Math.max(...numbers)}`;
console.log(biggest); // The biggest number is 54

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string formatter javascript OR JavaScript String Format or Interpolation