Browser Compatibility Testing of JAVASCRIPT Async functions

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

JAVASCRIPT Async functions

Async function make it possible to treat functions returning Promise objects as if they were synchronous.

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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 JAVASCRIPT Async functions.

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Real Time Testing on Chrome browser


Google Chrome

Chrome version 4 to 54 doesn't supports. Chrome version 55 to 70 suppports JAVASCRIPT Async functions.

Mozilla Firefox

Firefox version 2 to 51 doesn't supports JAVASCRIPT Async functions. Firefox version 52 to 63 supports JAVASCRIPT Async functions.

Internet Explorer

IE browser version 6 to 11 doesn't supports JAVASCRIPT Async functions.


Safari browser version 3.1 to 10 doesn't supports. Safari browser version 11 to 12 supports JAVASCRIPT Async functions.

Microsoft Edge

Microsoft Edge browser version 12 to 14 doesn't supports. Microsoft Edge browser version 15 to 18 supports JAVASCRIPT Async functions property.


Opera version 10.1 to 41 doesn't supports JAVASCRIPT Async functions. Opera version 42 to 53 supports JAVASCRIPT Async functions.

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.

Mark as a Bug

While performing cross browser testing on latest and oldest Chrome browser versions with LambdaTest, you can also mark your bug directly from LambdaTest to any bug management tool like: JIRA, Asana, Trello or move it to Github, Gitlab or also communicate over Slack.

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