Momentum continues to build for the WebAssembly binary format. WebKit, Apple’s open source browser engine used in Safari, now has a full implementation of WebAssembly.
Apple's WebKit implementation of WebAssembly follows Google’s recent decision to opt for WebAssembly for running native code in the browser; as a result, Google dumped its own Portable Native Client (PNaCl) technology. The four browser makers previously had agreed on a design of the initial WebAssembly and binary format. As a result, browsers now can have WebAssembly on by default.