BASELINE NowYouCanUse.com
Web Platform Baseline Status Breakdown Total Features: 1219
Widely Available 655 (53.73%)
Newly Available 120 (9.84%)
Limited 444 (36.43%)
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Status: All Widely Available
Categories: All CSS (3) HTML elements (3) JavaScript (2) Multi-column (2) Borders and outlines (1)
Clipboard (1) Fetch (1) Forms (1) Gamepad (1) Grid (1) HTML (1) Internationalization (1) Performance (1) Security (1) Selection (1) Strings (1) Units (1) WebAssembly (1) WebGL extensions (1)
Years: All 2026 2025 2024 2022 2021 2020 2017 2016 2015
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Showing 2 of 2 features

2017

2 features
• April 2017

Async functions

JavaScript
Widely Available

The async and await keywords allow you to use the asynchronous, promise-based behavior of a function without using promise chains.

Chrome 55
Firefox 52
Safari 10.1
Edge 15
Baseline Date: Apr 5, 2017
• March 2017

Exponentiation operator

JavaScript
Widely Available

The exponentiation (**) operator returns the result of raising the first operand to the power of the second operand.

Chrome 52
Firefox 52
Safari 10.1
Edge 14
Baseline Date: Mar 27, 2017