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Browser Compatibility Testing of JAVASCRIPT Promises

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


A promise represents the eventual result of an asynchronous operation. A Promise is a proxy for a value not necessarily known when the promise is created. It allows you to associate handlers with an asynchronous action's eventual success value or failure reason. This lets asynchronous methods return values like synchronous methods: instead of immediately returning the final value, the asynchronous method returns a promise to supply the value at some point in the future.

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online web app testing


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 JAVASCRIPT Promises.

All Browser Versions

Real Time Testing on Chrome browser


Google Chrome

Chrome version 4 to 31 doesn't supports. Chrome version 32 partially supports it. Chrome version 33 to 70 suppports JAVASCRIPT Promises.

Mozilla Firefox

Firefox version 2 to 26 doesn't supports JAVASCRIPT Promises. Firefox version 27 and 28 partially supports it. Firefox version 29 to 63 supports JAVASCRIPT Promises.

Internet Explorer

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


Safari browser version 3.1 to 7 doesn't supports. Safari browser version 8 to 12 supports JAVASCRIPT Promises.

Microsoft Edge

Microsoft Edge browser version 12 to 18 supports JAVASCRIPT Promises property.


Opera version 10.1 to 18 doesn't supports JAVASCRIPT Promises. Opera version 19 partially supports it. Opera version 20 to 53 supports JAVASCRIPT Promises.

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.

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.

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Fastest Way for Cross Browser Testing

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