April 2018 web platform update

Now available in Chrome
Limited availability

Abortable fetch: If you construct a fetch request with an AbortSignal, you can cancel the request. Learn more.
AbortController and AbortSignal: The AbortController and AbortSignal APIs allow you to cancel an ongoing operation, such as a fetch() request. Learn more.
Grid: CSS Grid is a two-dimensional layout system, which lays content out in rows and columns. Learn more.
<link rel="modulepreload">: The rel="modulepreload" attribute for the <link> HTML element indicates that a module script should be fetched, parsed, and compiled preemptively, and stored for later execution. Learn more.

Abortable fetch: If you construct a fetch request with an AbortSignal, you can cancel the request. Learn more.
AbortController and AbortSignal: The AbortController and AbortSignal APIs allow you to cancel an ongoing operation, such as a fetch() request. Learn more.
Grid: CSS Grid is a two-dimensional layout system, which lays content out in rows and columns. Learn more.
<link rel="modulepreload">: The rel="modulepreload" attribute for the <link> HTML element indicates that a module script should be fetched, parsed, and compiled preemptively, and stored for later execution. Learn more.

font-optical-sizing: The font-optical-sizing CSS property sets whether text rendering is optimized for viewing at different sizes. Learn more.
Push messages: The Push API subscribes to and receives server-initiated messages. Subscribers receive pushed messages in the background, even after periods inactive or offline. Learn more.
Resource size: The decodedSize, encodedSize, and transferSize properties of the PerformanceResourceTiming API reports the size of resources loaded. Learn more.

Canvas text baselines: The alphabeticBaseline, hangingBaseline, and ideographicBaseline canvas text metrics measure the distance from the used textBaseline to the respective typographic baseline. Learn more.
Promise finally(): The promise finally() method executes a function when the promise settles (resolves or rejects). Learn more.
Storage access: The document.requestStorageAccess() method allows content in iframes to request storing and reading cookies and other site data, while the document.hasStorageAccess() method checks if such access is granted. Learn more.