Browser Compatibility Testing of async attribute for external scripts

Get Started

Browser Compatibility Testing For CSS text-stroke and text-fill

async attribute for external scripts

The boolean async attribute on script elements allows the external JavaScript file to run when it's available, without delaying page load first.

Sign Up For Free

online web app testing

HTML 5

Test your Web App on LambdaTest

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 async attribute for external scripts.

All Browser Versions

Real Time Testing on Chrome browser

BROWSER SUPPORT FOR async attribute for external scripts

Google Chrome

Chrome 4 to 7 doesn't supports. Chrome 8 to 70 supports async attribute for external scripts property.

Mozilla Firefox

Firefox 2 to 3.5 dosen't supports. Firefox 3.6 to 63 supports async attribute for external scripts property.

Internet Explorer

IE browser version 6 to 9 doesn't support. IE browser version 10 and 11 support async attribute for external scripts.

Safari

Safari browser version 3.1 to 4 doesn't supports. This property is not supported by default but can be enabled by Safari 5 version. Safari browser version 5.1 to 12 supportsasync attribute for external scripts.

Microsoft Edge

Microsoft Edge browser version 12 to 18 doesn't supports async attribute for external scripts.

Opera

Opera version 10.1 and 23 doesn't supports.Opera version 24 and 53 doesn't supports async attribute for external scripts.

Information sourced from
Can I use

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

  • Chrome Browsers
  • Firefox Browsers
  • Edge Browsers
  • Internet Explorer Browsers
  • Opera Browser
  • Safari Browser
  • Yandex Browsers

Other Browser Elements and Properties

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.

Checkout All Elements

BENEFITS

Fastest Way for Cross Browser Testing

Test your website on Firefox

You can test your website for cross browser compatibility across all Firefox browser versions using LambdaTest

Test your website on Chrome

Perform cross browser testing of your website/ webapp across all Chrome browser versions using LambdaTest

Test your website on Safari

Check your website on all Safari browser on Mac and Windows for cross browser compatibility with LambdaTest

Test your website on IE

Perfrom cross browser testing of your website/ web app across all IE verions using LambdaTest

Free Plan With 60 Minutes of Live Testing

Our plans starts with a free plan where you access to all features and free 60 minutes of live testing per month.

Scale As You Go

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.