📃 October 2019 release notes

Widely available

The following features are now widely available:

• Async functions: The async and await keywords allow you to use the asynchronous, promise-based behavior of a function without using promise chains.
• Composition events: The compositionstart, compositionupdate, and compositionend events fire when an input method editor adds characters that might not be commonly available on keyboards. Examples of these characters are emoji, logograms in Asian languages, or input from speech recognition processors.
• Custom properties: Custom properties are CSS properties prefixed with -- that set values you can reuse with the var() function. For example, you can set a --key-color property to reuse as border-color: var(--key-color). Also known as CSS variables.
• font-feature-settings: The font-feature-settings CSS property sets low-level OpenType feature tags for a font. When possible, use font-variant instead.
• Outlines: The outline-color, outline-style, and outline-width and outline-offset CSS properties style a line around an element, outside of the border.
• String padStart() and padEnd(): The padStart() and padEnd() methods of strings return a string lengthened to a minimum number of characters by adding characters to the start or end of the string.
• Text stroke and fill (compatibility prefixes): The -webkit-text-stroke-width and -webkit-text-stroke-color CSS properties set the thickness and color of text outlines. The -webkit-text-fill-color sets the color within text character outlines. Both default to the text color.
• WEBGL_debug_renderer_info WebGL extension: The WEBGL_debug_renderer_info extension for WebGL 1.0 and 2.0 contexts exposes information about the graphics driver for debugging purposes.