(' this is null or not defined'); } var O = Object(this); var len = O.length >>> 0; if (typeof callback !== "function") { throw new TypeError(callback + ' is not a function'); } if (arguments.length > 1) { T = thisArg; } k = 0; while (k < len) { var k...
__lookupSetter__(property: PropertyKey): Function | void; __proto__: Object | null; // required a way setting of prototype - will not in IE10-, it's for modern engines like Deno static assign(target: Object, ...sources: Array<Object>): Object; static create(prototype: Object | nu...
我们直接看源码中createReactiveObject函数部分 function createReactiveObject( target: Target, isReadonly: boolean, baseHandlers: ProxyHandler<any>, collectionHandlers: ProxyHandler<any>, proxyMap: WeakMap<Target, any> ) { // 如果目标不是对象,直接返回原始值 if (!isObject(target)) { return target;...
MicroTask: process.nextTick, Promises, Object.observe, MutationObserver 通俗来说,MacroTasks 和 MicroTasks 最大的区别在它们会被放置在不同的任务调度队列中。 每一次事件循环中,主进程都会先执行一个MacroTask 任务,这个任务就来自于所谓的MacroTask Queue队列;当该 MacroTask 执行完后,Event loop 会立马调用 Mi...
TypeScript 2.3 引入了一个新的--downlevelIteration标志,为以 ES3 和 ES5 目标添加了对 ES6 迭代协议的完全支持。for...of循环现在可以用正确的语义进行向下编译。
注:Promise.all 方法的参数可以不是数组,但是必须是一个Iterator接口对象,且返回promise实例,否则报错:error:TypeError: [object Promise] is not iterable! let p1 =new Promise(function(resolve,reject){ resolve(1); }); let p2 = new Promise(function(resolve,reject){ ...
308 Object.getPrototypeOf() ECMAScript 5, JavaScript, Method, Object Object.getPrototypeOf() 方法返回指定对象的原型(内部[[Prototype]]属性的值)。 309 Object.is() ECMAScript 2015, JavaScript, 判断, 对象, 方法, 相等 Object.is() 方法判断两个值是否是相同的值。 310 Object.isExtensible() Object....
t know the values and the end state we iterate over. Instead, we get promises that eventually resolve to the usual{ value: any, done: boolean }object. We also get the for-await-of loop to help us with looping over async iterators. That is just like the for-of loop is for ...
constpartitionKey:string='gear-surf-surfboards';constfilter:string= odata`PartitionKey eq '${partitionKey}'`constqueryOptions: TableEntityQueryOptions = { filter: filter }constentities: PagedAsyncIterableIterator<TableEntityResult<Product>, TableEntityResultPage<Product>> = table.listEntities<Product>(...
next()); }); }; Object.defineProperty(exports, "__esModule", { value: true }); function main() { return __awaiter(this, void 0, void 0, function* () { let xx = { branch: false }; if (xx.branch) { console.log("zms1"); } else { console.log("zms2"); } }); } ...