NativeScript runs JavaScript on a JavaScript VM • JavaScriptCore on iOS • V8 on Android • JavaScriptCore on Windows • Runs on V8 • Runs on JavaScriptCore Gathering Native APIs • NativeScript uses • V8/JavaScript Core have APIs to inject global variables Invoking native APIs • V8/JavaScriptCore have C++ callbacks for JS function calls and property accesses. • The NativeScript runtime

output: JavaScript NativeScript iOS Example JavaScript Runs on V8 JavaScript VM Runs on JavaScriptCore VM NativeScript Module Layer (NML) o Abstractions on native APIs provide unified, cross-platform

@rowdyrabouw 23/120 NativeScript Runtime 4 Runs on JavaScript Virtual Machines 4 V8 (Android) 4 JavaScriptCore (iOS) 4 Executes C++ code to invoke native code 4 Uses reflection to generate metadata 4 Examines

engines Other browsers have their own JavaScript engine: Firefox has Spidermonkey Safari has JavaScriptCore (also called Nitro) Edge was originally based on Chakra but has more recently been rebuilt

API 以及 macOS Cocoa frameworks 的能力，这意味着除了标准的 JavaScript 库外，还可以使用许多很棒 的类与函数。CocoaScript 建立在苹果的 JavaScriptCore 之上，而 JavaScript- Core 是为 Safari 提供支持的 JavaScript 引擎。 因此，当你使用 CocoaScript 编写代码的时候，你就是在写 JavaScript。Co-

GoLightly - A flexible and lightweight virtual machine with runtime- configurable instruction set app JavaScriptCore - This is a wrapper for WebKit's javascript engine for Go. lib RubyGoLightly - An experimental