Declares a variable with block level scope.
With LambdaTest you can test your website on 2000+ browser and OS combinations for cross browser compatibility issues and ensure that your webpage fallbacks are working fine on browsers that do not support
Chrome browser version 4 to Chrome browser version 18 doesn't supports it. Chrome browser version 19 to Chrome browser version 40 is not supported by default but can be enabled. Chrome version 41 to 48 partially supports it and partial support for Chrome refers ot supporting an older version of the web browser. Chrome browser version 49 to 70 supports
Mozilla Firefox browser version 2 to Mozilla Firefox browser version 43 is not supported by default but can be enabled. Mozilla Firefox browser version 44 to Mozilla Firefox browser version 63 supports
Internet Explorer browser version 6 to Internet Explorer browser version 10 doesn't supports. Internet Explorer browser version 11 partially supports
Safari browser version 3.1 to Safari browser version 9.1 doesn't supports. Safari browser version 10 and Safari browser version 10.1 partially supports it and partial support for Safari refers ot supporting an older version of the web browser. Safari browser version 11 to Safari browser version 12 suppoprts
Microsoft Edge browser version 12 to Microsoft Edge browser version 18 supports
Opera browser version 10.1 and Opera browser version 12.1 doesn't supports
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
All websites and webapps use collections of a lot of browser technologies and elements. Not all of these elements are supported by all browsers and browser versions. At LambdaTest you can test your website on all browsers and browser versions and easily debug browser compatibility issues in real time.
You can test your website for cross browser compatibility across all Firefox browser versions using LambdaTest
Perform cross browser testing of your website/ webapp across all Chrome browser versions using LambdaTest
Check your website on all Safari browser on Mac and Windows for cross browser compatibility with LambdaTest
Perfrom cross browser testing of your website/ web app across all IE verions using LambdaTest
Our plans starts with a free plan where you access to all features and free 60 minutes of live testing per month.
Need support for a larger team? We have very flexible plans and if they don’t suffice, leave us a message here, and we would help you out.