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.
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
BROWSER SUPPORT FOR
Chrome version 4 to 31 doesn't supports. Chrome version 32 partially supports it. Chrome version 33 to 70 suppports
Firefox version 2 to 26 doesn't supports
IE browser version 6 to 11 doesn't supports
Safari browser version 3.1 to 7 doesn't supports. Safari browser version 8 to 12 supports
Microsoft Edge browser version 12 to 18 supports
Opera version 10.1 to 18 doesn't supports
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.
Fastest Way for Cross Browser Testing
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.
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