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20 Amazing Flutter Open-Source Projects to Know in 2023 Reference 20 Amazing Flutter Open-Source Projects to Know in 2023

Harmony ArkTS ArkTS是在TypeScript上扩展. UI是声明式, 设置属性和事件链式调用. Decorator @Component 自定义组件, ArkTS卡片 @Entry 入口组件, ArkTS卡片, 一个页面有且只有一个 @State 状态变量 @Builder @Component轻量实现 @BuilderParam @BuilderParam用来装饰指向@Builder方法的变量, 为自定义组件增加特定的功能. 类似slot @Styles @Styles装饰器可以将多条样式设置提炼成一个方法 @Extend @Extend，用于扩展原生组件样式 多态样式 stateSt...

Harmony Introduce UI框架: * 声明式 * 类Web 应用模型: Feature Ability, FA Stage Stage模型应用程序包结构 一个应用可以包含多个Module Module分为”Ability”和”Library” “Ability” - 对应编译后HAP (Harmony Ability Package) “Library” - 对应编译后HAR(Harmony Archive), 或HSP(Harmony Shared Package) 一个Module可以包含多个UIAbility组件 DevEco Studio使用ohpm把应用编译为一个或多个.hap后缀的文件. ...

JS TypeArrays Reference Strict mode

JS Prototype JS 查找属性会依次查看原型, 直到找到或者原型为null为止 # 指定someObject原型 someObject.[[Prototype]] # 读取及设置原型 Object.getPrototypeOf() Object.setPrototypeOf() obj.__proto__ # 非标准 __proto__ syntax Prototype setter A property definition of the form proto: value or “proto”: value does not create a property with the name proto. Instead, if the prov...

JS modules basic-modules index.html main.js modules/ canvas.js square.js Exporting module features export statement can export functions, var, let, const, class. need top-level export { name, draw, reportArea, reportPerimeter }; Importing features into your script import { name, draw, reportArea, reportPerimeter } from "./mo...

JS Memory Management Garbage collection Reference-counting garbage collection no modern JavaScript engine uses reference-counting for garbage collection anymore. Mark-and-sweep algorithm Configuring an engine’s memory model node --max-old-space-size=6000 index.js node --expose-gc --inspect index.js Data structures aiding memory manag...

JS Concurrency Making HTTP requests using fetch() Accessing a user's camera or microphone using getUserMedia() Asking a user to select files using showOpenFilePicker() Promises let promise = new Promise(function(resolve, reject) { resolve("done"); reject(new Error("…")); // ignored setTimeout(() => resolve("…")); // ignored }); ne...