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What Is The Difference Between ES5 And ES6?

The software development industry’s most important two scripting languages are ES5 and ES6. Both scripting languages have certain similarities in nature. At the same time, you will find specific differences between ES5 and ES6.

ES (ECMAScript) is the standardized scripting language for JavaScript. The modern browser that supports the current ES version is ES5. But, ES6 tackles more limitations of the core language. Are you curious to know about that? If yes, then keep reading the following section.

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Significant Features Of ES5 And ES6

If you want to know the between ES5 and ES6, you should know about their features in-depth. It helps you to understand more exciting and valuable things.


  • Arrows – This function describes with the help of “=>” syntax.
  • Destructing – It lets binding pattern that is based on the pattern matching.
  • Classes – It is easier to implement over the prototype-based object-oriented pattern.
  • Objects – Object literal is utilized to support the prototype assignments.


The fifth edition of the ECMA Script is ES5, with the following essential features.

  • Strict mode – It assists the JavaScript languages to perform more effectively by applying more checks and then cleaning the existing features properly.
  • Syntactical changes – It includes property keys using reserved words, multiline string literals, and trailing commas.
  • Accessors – It lets the users implement the setting and get off the property by accessing methods.
  • Additional features – The extra features introduced in recent times are metaprogramming, in-built objects, usage of bracket operators.

Benefits And Disadvantages 


ES6 is called ECMAScript 2015 or ECMAScript 6, the newer version of JavaScript introduced in 2016. The standard JavaScript programming language access is ECMAScript. It renders the specification on how JavaScript should work.


  • It is easier to represent the code codes in a cleaner syntactical way.
  • You do not need to use the function keyword to define the function. You can even avoid the return keyword to fetch the computed value.
  • When it comes to implementing ES6, the tail call optimization feature needs to enable.
  • Handle interpolation and string templates are accessed more maturely when implementing the script with the ES6 language.
  • The scripting language helps you to use the shorthand syntax for object literal.


  • Compared to ES5, it lacks a bit in terms of the networking and support perspective.
  • It may look tricky from the learning perspective compared to normal JavaScript.
  • In terms of runtime comparison and browser support, it laps slightly, especially when undergoing heavy object loads.
  • It creates a little bit of confusion over the standard coding practices.



  • It helps users implement the strings’ property access arrays [] features.
  • It supports and then processes the implementation of multiline string literal
  • All the functions and their respective usage can describe with the ES5.
  • You can access the reserved words as the property names
  • The core codes represent in a cleaner syntactical way.


  • The new features available in ES6 are not available in ES5
  • It may look a bit complicated from the learning perspective compared to the normal JavaScript
  • It creates a little bit of confusion over the standard coding practices.

Significant differences between ES5 and ES6

Here, you will find the significant differences between ES5 and ES6. It helps you decide which version suits your project to yield the result you expect.

  • Definition


ECMAScript is the trademarked and popular scripting language specification defined by ECMA International. The sixth edition of the ECMAScript is called ES6. It is a significant enhancement in the JavaScript language. It allows the developers to write the programs for complex applications.


ES5 is the first significant revision to JavaScript. The fifth edition of ES allows you to define the object methods with the syntax, which looks like setting or getting the property. In 2009, ES5 was released after ten years of its previous version. It boasts tons of features such as new methods in the array, “use strict” directive, and JSON support.

  • Template literals

It becomes unnecessary to escape the special characters and then describe consolidation operators using the template literal () “Anu”. In addition, you can define the variable as mentioned below within the template literal s{variable}.


let name = ‘Anu’;

let age = 13;

console.log(`My name is ${name}, I’m ${age} years old .`);

// My name is “Anu” and I ‘m 9years old.


var name = “Anu”;

var age = 12;

console.log (“My name is \” “+ name +” \ “and I ‘m” + age + “years old.”);

// My name is “Anu” and I ‘m 12 years old.

  • Object manipulation 


In ES6, the object manipulation processes more smoothly and effectively than its previous versions because of the presence of speed operators and destructuring.


It offers the same features, but it consumes more time than the ES6.

  • Support


With ES6, you will get access to lots of community support. It is less than that of its previous version, ES5.


ES5 renders a vast range of community support. It helps you to grab more benefits.

  • Performance


ES6 scores higher than ES5 because of its newly implemented features and shorthand storage implementation.


It is the prior version to ES6, and thus it does not have a few essential features. So, the performance level of ES5 is a bit less than that of ES6.

After comparing ES5 and ES6 over a wide range of factors, it is concluded that these two major scripting languages have specific benefits and drawbacks. According to your project need, time of work, and other aspects, you have to choose the right one to reach the desired goal.

If you want to find the best ES scripting language for your project but have confusion between ES6 and ES5, you can contact the experts at JDM Web Technologies.

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