3 Javascript : async constructor pattern 434 How can I invoke asynchronous code within a constructor? 0 Promises => Async/Await...Does this have any benefits? 0 Is creating a new promise with a async function call bad practice? 1 async constructor in nodejs 3 Async/Aw...
}// factory for common, extensible class - that's the reason for the constructor parameter// it can be more sophisticated and accept also params for constructor and pass them there// also, the timeout is just an example, it will wait for about 10s (1000 x 10ms iterationsfunctionfactory(...
class Storage { constructor() { this.cachePromise = caches.open('avatars'); } async getAvatar(name) { const cache = await this.cachePromise; return cache.match(`/avatars/${name}.jpg`); } } const storage = new Storage(); storage.getAvatar('jake').then(…); // 箭头函数 const foo ...
javascript复制代码classApiClient{constructor(){this.value=null;}asyncfirstMethod(){this.value=awaitfetch('/first-url').then(r=>r.json());returnthis;}asyncsecondMethod(){this.value=awaitfetch('/second-url').then(r=>r.json());returnthis;}}// 使用方式constclient=newApiClient()...
在JavaScript中,类的构造器(constructor)不能是异步的。但可以通过工厂函数模式来实现类实例的异步初始化。 class Example { constructor(data) { this.data = data; } static async create() { const data = await fetchData(); // 异步获取数据
在JavaScript中,类的构造器(constructor)不能是异步的。但可以通过工厂函数模式来实现类实例的异步初始化。 classExample { constructor(data) {this.data =data; }staticasynccreate() {constdata =awaitfetchData();//异步获取数据returnnewExample(data); ...
classSleep{constructor(timeout){this.timeout=timeout;}then(resolve,reject){conststartTime=Date.now();setTimeout(()=>resolve(Date.now()-startTime),this.timeout);}}(async()=>{constsleepTime=awaitnewSleep(1000);console.log(sleepTime);})();// 1000 ...
constructor(){ this.cachePromise=caches.open('avatars'); } async getAvatar(name){ const cache=awaitthis.cachePromise; returncache.match(`/avatars/${name}.jpg`); } } const storage=newStorage(); storage.getAvatar('jake').then(…); ...
constructor(start, stop) {this.value =start;this.stop =stop; } [Symbol.iterator]() {returnthis; } next() {varvalue =this.value;if(value <this.stop) {this.value++;return{done:false, value: value}; }return{done:true, value: undefined}; ...
深入理解JavaScript中Ajax（上），认识Ajax这一篇就够了！http 传输协议 http(s) 协议规定了, 只能由...