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ES6 classes are syntactical sugar to provide a much simpler and clearer syntax to create objects and deal with inheritance.
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Google Chrome

Chrome browser version 4 to Chrome browser version 41 doesn't supports. Chrome browser version 42 to Chrome browser version 48 partially supports it and partial support in Chrome refers to supporting an older version of the specification. Chrome browser version 61 to Chrome browser version 70 suppports JAVASCRIPT ES6 classes.

Mozilla Firefox

Mozilla Firefox browser version 2 to Mozilla Firefox browser version 44 doesn't supports JAVASCRIPT ES6 classes. Mozilla Firefox browser version 45 to Mozilla Firefox browser version 63 supports JAVASCRIPT ES6 classes.

Internet Explorer

Internet Explorer browser version 6 to 11 doesn't supports JAVASCRIPT ES6 classes.


Safari browser version 3.1 to Safari browser version 8 doesn't supports. Safari browser version 10.1 partially supports it. Safari browser version 9 to 12 supports JAVASCRIPT ES6 classes.

Microsoft Edge

Microsoft Edge browser version 12 to Microsoft Edge browser version 18 supports JAVASCRIPT ES6 classes property.


Opera browser version 10.1 to Opera browser version 28 doesn't supports JAVASCRIPT ES6 classes Opera browser version 29 to Opera browser version 35 partially supports it and partial support in Opera refers to supporting an older version of the specification. Opera version 48 to 53 supports JAVASCRIPT ES6 classes.

Information sourced from

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

  • Google Chrome
  • Mozilla
  • Edge
  • IE
  • opera
  • Safari
  • Yandex

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